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How to build a 3 pill Linear amplifier for 10 & 11 Meter
 
09:25
This video shows you how to build a 3 pill amplifier typically used on CB radios, but can be used on 10 & 11 meters alike. This amplifier is similar to Fatboy, Davemad & xforce. I have other amplifier How too video's as well. This amplifier uses 1 SD-1446 to driver 2 2sc2879's. You can substitute the SD-1446 for a 2sc2290 if you like, which is a common variant. (Proper adjustment for impedance matching must be made) DISCLAIMER: The use of linear amplifiers on the 11 meter, or CB, is against FCC regulations. I do not condone the use of such a device on Citizens Band, or in any other way that would be deemed illegal. I am posting this for education purposes. It is perfectly legal to build as long as it is used on the correct band by a licensed Ham operator, or as long as it is operated into a Dummy load and not transmitted Live. By viewing this video you agree that you and only your self is accountable for use of this information. This is from a collection of amplifier plans released by PFS technology and originally called power plate amplifiers. Rick Wilson was the owner and designer of these plans. This was during the late 90's. At some point after that someone had taken a copy of these plans and stripped out whatever PFS logo's they could from the PDF's and photos. Any manuals or photoframes they could not remove these logos, they simply discarded. They then took these stripped down amp plans and started selling them on their own. These plans are still around the Internet in various places. They are missing a lot of plans, and stop at a class c 16 pill amplifier. As well after the 1x4 design, you will be laking the full manual and any further explanations as well as limited photoframes. I have posted the following slide show for EDUCATIONAL purposes. I will be posting information from the “AMPPLANS” that have continued to circulate the Internet. I will not however post any from the full plans since they have not been linked in order to protect Rick Wilson's intellectual property. They only reason I will post these is because they have been widely distributed.
Просмотров: 9545 dr07828
How to build a 1 pill linear amplifier (modulator)
 
08:45
This video shows you how to build a 1 pill amplifier typically used on CB radios, but can be used on 10 & 11 meters alike. This amplifier is similar to Fatboy, Davemad & xforce. I have other amplifier How too video's as well. This amplifier uses 1 2sc2879, but works best with a 2sc2290, and can also work the an SD1446. DISCLAIMER: The use of linear amplifiers on the 11 meter, or CB, is against FCC regulations. I do not condone the use of such a device on Citizens Band, or in any other way that would be deemed illegal. I am posting this for education purposes. It is perfectly legal to build as long as it is used on the correct band by a licensed Ham operator, or as long as it is operated into a Dummy load and not transmitted Live. By viewing this video you agree that you and only your self is accountable for use of this information. This is from a collection of amplifier plans released by PFS technology and originally called power plate amplifiers. Rick Wilson was the owner and designer of these plans. This was during the late 90's. At some point after that someone had taken a copy of these plans and stripped out whatever PFS logo's they could from the PDF's and photos. Any manuals or photoframes they could not remove these logos, they simply discarded. They then took these stripped down amp plans and started selling them on their own. These plans are still around the Internet in various places. They are missing a lot of plans, and stop at a class c 16 pill amplifier. As well after the 1x4 design, you will be laking the full manual and any further explanations as well as limited photoframes. I have posted the following slide show for EDUCATIONAL purposes. I will be posting information from the “AMPPLANS” that have continued to circulate the Internet. I will not however post any from the full plans since they have not been linked in order to protect Rick Wilson's intellectual property. They only reason I will post these is because they have been widely distributed.
Просмотров: 7470 dr07828
How to build a 2 pill linear amplifier for use on 10 & 11 meters.
 
11:07
This video shows you how to build a 2 pill amplifier typically used on CB radios, but can be used on 10 & 11 meters alike. This amplifier is similar to Fatboy, Davemad & xforce. I have other amplifier How too video's as well. This amplifier uses 2 2sc2879's. DISCLAIMER: The use of linear amplifiers on the 11 meter, or CB, is against FCC regulations. I do not condone the use of such a device on Citizens Band, or in any other way that would be deemed illegal. I am posting this for education purposes. It is perfectly legal to build as long as it is used on the correct band by a licensed Ham operator, or as long as it is operated into a Dummy load and not transmitted Live. By viewing this video you agree that you and only your self is accountable for use of this information. This is from a collection of amplifier plans released by PFS technology and originally called power plate amplifiers. Rick Wilson was the owner and designer of these plans. This was during the late 90's. At some point after that someone had taken a copy of these plans and stripped out whatever PFS logo's they could from the PDF's and photos. Any manuals or photoframes they could not remove these logos, they simply discarded. They then took these stripped down amp plans and started selling them on their own. These plans are still around the Internet in various places. They are missing a lot of plans, and stop at a class c 16 pill amplifier. As well after the 1x4 design, you will be laking the full manual and any further explanations as well as limited photoframes. I have posted the following slide show for EDUCATIONAL purposes. I will be posting information from the “AMPPLANS” that have continued to circulate the Internet. I will not however post any from the full plans since they have not been linked in order to protect Rick Wilson's intellectual property. They only reason I will post these is because they have been widely distributed.
Просмотров: 8356 dr07828
Eimac 3-400Z Grounded Grid Linear Amplifier Build For Amateur Radio
 
14:29
My first build using the 3-500Z triode. I am very impressed with the RF power the tube can deliver to the output. This amplifier only has a tuned input circuit for the 20 meter amateur band in this video. I plan on installing tuned circuits for all five HF bands later. Thanks for watching.
Просмотров: 8792 ElPaso TubeAmps
How to build a 6 pill amplifier for 10 & 11 meters.
 
07:06
This video shows you how to build a 6 pill amplifier typically used on CB radios, but can be used on 10 & 11 meters alike. This amplifier is similar to Fatboy, Davemad & xforce. I have other amplifier How too video's as well. This amplifier uses 6 2sc2879's. DISCLAIMER: The use of linear amplifiers on the 11 meter, or CB, is against FCC regulations. I do not condone the use of such a device on Citizens Band, or in any other way that would be deemed illegal. I am posting this for education purposes. It is perfectly legal to build as long as it is used on the correct band by a licensed Ham operator, or as long as it is operated into a Dummy load and not transmitted Live. By viewing this video you agree that you and only your self is accountable for use of this information. This is from a collection of amplifier plans released by PFS technology and originally called power plate amplifiers. Rick Wilson was the owner and designer of these plans. This was during the late 90's. At some point after that someone had taken a copy of these plans and stripped out whatever PFS logo's they could from the PDF's and photos. Any manuals or photoframes they could not remove these logos, they simply discarded. They then took these stripped down amp plans and started selling them on their own. These plans are still around the Internet in various places. They are missing a lot of plans, and stop at a class c 16 pill amplifier. As well after the 1x4 design, you will be laking the full manual and any further explanations as well as limited photoframes. I have posted the following slide show for EDUCATIONAL purposes. I will be posting information from the “AMPPLANS” that have continued to circulate the Internet. I will not however post any from the full plans since they have not been linked in order to protect Rick Wilson's intellectual property. They only reason I will post these is because they have been widely distributed.
Просмотров: 3925 dr07828
Prepping Tip: How Improve Your Ham Radio Or Scanner Antenna
 
08:02
A simple scanner can give you as a prepper, a whole lot of info about what is going on around you. This is a simple and almost free way to improve your scanner antenna for better reception
Просмотров: 15787 Iridium242
Homebrew 80/40m SSB/CW Rig - #9a RF Power Amplifier Ideas
 
12:55
Video looking at the the initial plan for the RF power amplifier. It's based on the IRF510 push-pull amplifier from Mike Kosser WA3EBY. I'll get this stage up and running first using a sig gen, then look to design the driver.
Просмотров: 545 Charlie Morris
How to repair weak distorted channel Realistic SA 1000 home stereo amplifier D-Lab
 
15:53
Purchased the little jewel of an amp on ebay. Seller was honest, stating that it had a bad channel, true. I was impressed of it's great cosmetic condition and thought, what a super Youtube presentation. So, here it is! After verifying the fault, it reminded me of vintage tube amp repairs, so I decided to change out all of the main amp caps, hopefully remedying the issue without troubleshooting! It worked! I was happy and a bit shocked. Now I see some similarities between early solid state vrs tube circuits. I plan to feature more of these shoot from the hip approaches.
Просмотров: 9635 D-lab Electronics
Homebrew 40m CW Rig - #5b Class E Amp Design
 
17:10
Video looking at the paper design of the Class E amplifier using the principles and equation presented by Nathan Sokal. The aim is to use BS170 MOSFETs for the active device. The video also looks at the plan to build a homebrew CW crystal filter using the approach presented by Wes Hayeard in the July 1987 QST magazine. Apologies for the sound and picture quality. I couldn't use the normal camera.
Просмотров: 399 Charlie Morris
How to Build an 11 - 10 meter liner amplifier. 4 pill
 
20:31
This is a video side show of how to build a liner amplifier for use on 10 and 11 meters. These plans show how to build an amplifier very similar to Davemade, Fatboy and Xforce. You can follow the slides and build one of these amps. The amplifer in the design is a 4 pill amplifier, but using this basic design you can build any number of pills amplifier. You can purchase parts from the following websites. http://www.icamanufacturing.com/ http://www.rfparts.com http://www.rfjunk.com Here is a part's list for building this amp. R4, R5, & R15 4.7Ω 2W Carbon Film Resistor 3 Yellow-Violet-Gold R10, R11 R12, & R13100Ω 2W Metal Film Resistor 4 Brown- Black- Brown R6, R7, R8, & R9 10Ω 1/2W Carbon Film Resistor 4 Brown-Black-Black R14 100Ω 5W Metal Film Resistor 1 Brown- Black- Brown C23 1000 pf Silver Dipped Mica Capacitor 1 1000 or 102 / 500V C11, C12 C13, & C14120 pf Silver Dipped Mica Capacitor 4 120 / 500V C19, C20, C21, C22 C25, C26, C27, C28 .01 uf Ceramic Disc Capacitor 8 103 C15, & C16 330pf Silver Dipped Mica Capacitor 2 330 /500V C17, & C18 820pf Metal Clad Capacitor 2 820 C24 150 pf Metal Clad Capacitor 1 150 C29 22 uf Electrolytic Capacitor 1 22 uf / 25V C30 10 pf Ceramic Disc Capacitor 1 10 VC1 Mica Compression Trim Capacitor 1 465 D1 3A / 1000V PIV Silicon Rectifier 1 1N5408 D2 1A / 1000V PIV Silicon Rectifier 1 1N4007 D3 Glass Signal Diode 1 1N4148 D4 LED Indicator assy. 1 Blue LED / Resistor Pkg. TR2, TR3 TR4, & TR5 200 Watt RF Power Transistor 4 2SC2879 TR6 NPN Switching Transistor / TO-92 1 PN2222A CHK8, 9, 10 11, 12, & 13 1⁄2” x 1⁄2” Ferrite Core 6 CHK2, 3, 6, & 7 1⁄4” x 1⁄2” Ferrite Core 4 T3, & T4 1⁄2” x 1⁄2” Ferrite Transformer Core 2 T5, T6 1⁄2” x 2” Ferrite Transformer Core 2 SW1 SPST Switch 1 RLY1 DPDT Relay 12V Coil /10A Contacts 1 FAN1 4.7” Fan Assy. 1 FG1 4.7” Fan Guard 1 Conn1, Conn2 Panel Mount SO239 UHF Connector 2 Conn3 1⁄4” Stereo Phone Jack 1 Cabinet Aluminum Enclosure Assy. 1 HS1 Aluminum Heat Sink 1 CB1 Pre-Drilled Copper Clad Circuit Board 1 CB2 Copper Clad Circuit Board 5-1/8” x 3/4” 1 PS1, & 2 4 Position Pre-Cut Transistor / Pill Strips 2 SCK1 LED Mounting Clip w/ LED Assy. 1 WIRE-1 10” Length of #20 Silver/Teflon Wire 1 WIRE-2 93” Length of #16 Silver/Teflon Wire 1 WIRE-3 3” Length of #14 Silver/Teflon Wire 1 WIRE-4 25” Length of #20 Hook-up Wire (Color 1) 1 WIRE-5 18” Length of #20 Hook-up Wire (Color 2) 1 WIRE-6 12” Length of #10 Red Power Cable 1 WIRE-7 12” Length of #10 Black Power Cable 1 COAX 7” Length RG316 Coax 1 HDW1 Hardware Kit (See Below) SHCS #4 40 x 1⁄4” Socket screw 12 SHCS #6 32 x 1⁄4” Socket screw 12 Pan Head Sheet Metal Screw 6 Pan Head Machine Screw #6 32 x 1⁄2” 8 #6 Lock Washer 6 #6 32 TPI Machine Nut 4 #6 Solder Lug 3 Pan Head Machine Screw #8 32 x 1-1/2” 4 #8 32 TPI Machine Lock Nut (Nylock) 4 Rubber Feet 4 Rubber Grommet 1 Scrap circuit board material 1 Heat sink lubricant 1 Label Sheet 1 4” Cable Tie 4 This is from a collection of amplifier plans released by PFS technology and originally called power plate amplifiers. Rick Wilson was the owner and designer of these plans. This was during the late 90's. At some point after that someone had taken a copy of these plans and stripped out whatever PFS logo's they could from the PDF's and photos. Any manuals or photoframes they could not remove these logos, they simply discarded. They then took these stripped down amp plans and started selling them on their own. These plans are still around the Internet in various places. They are missing a lot of plans, and stop at a class c 16 pill amplifier. As well after the 1x4 design, you will be laking the full manual and any further explanations as well as limited photoframes. I have posted the following slide show for EDUCATIONAL purposes. I will be posting information from the “AMPPLANS” that have continued to circulate the Internet. I will not however post any from the full plans since they have not been linked in order to protect Rick Wilson's intellectual property. They only reason I will post these is because they have been widely distributed.
Просмотров: 9906 dr07828
Building a cheap radio tower.
 
04:18
Built with recycled material to aid me in communicating now and in WROL
Просмотров: 94234 southernprepper1
AM Loop Antenna from PVC Pipe
 
10:26
*REUPLOAD* - Sorry folks, but YouTube decided to fill all the blank spaces with static in the last go-round. Call me picky, but I just couldn't stand it so here's a second go. If you had commented on the 1st upload - THANKS! I wish there was a way to preserve that kind of thing here. I built a loop antenna designed to boost the reception of AM broadcast radio. It's simple construction, requiring only some PVC pipe, speaker wire, and a variable capacitor scrounged from an old radio. The results are pretty good, even through the weather decided not to cooperate on filming day. Here's the link to the on-line loop calculation I used: http://www.angelfire.com/mb/amandx/loop.html
Просмотров: 92398 Matt Heere
Crystal Radio, Capacitive Tuning - WORKS GREAT!
 
16:33
The BEST crystal radio I have used or built! This radio works very well. I've tried many crystal radio designs with variable capacitor tuning and none worked. (I've got a video on a failed one.) The starting point for this model came from a 1997 ARRL article (based on a design from the 1930's by Elmer G. Osterhoudt) and I've made changes in both parts and construction. This is now one of my 2 favorite crystal radios. The other is the modified Boy Scout radio. The BSA radio is simpler to construct, cheaper - requires only 2 purchased parts, easier to operate / tune, does not require a significant ground. It gives a loud output. On the downside selectivity is not good; weaker signals are often buried under crosstalk from stronger stations. The modified ARRL 1997 radio is more expensive, and more complex to build. It requires a good ground. Where this radio shines is in clarity of reception, i.e. selectivity - it tunes very precisely and even the weakest signals can be heard without crosstalk. The output is only slightly weaker than the BSA radio. Overall a very good radio. If you like radio and / or electronics, you might consider joining ARRL (Amateur Radio Relay League). www.arrl.org MATERIALS - 1N34a germanium diode (can NOT use substitutes) - Piezoelectric earphone (can NOT use substitutes) - 2 x 450 pF variable capacitors (can be air or mica types) - 10K ohm resistor (can vary to suit your radio) - Inductor: approx 146 microhenries. Core - 4 inch diameter PVC pipe. Wire - 32 turns, 35 feet (10.668 m) of 0.5mm diameter (23-24 wire gauge) enamel wire. 1.1 feet per turn. 1.1 feet = 33.582 cms. 35 feet = 10.668 meters. Circumference of 1.09 feet = diameter of 4.16349 inches. ANTENNA The best antenna would be 152.4m (500 feet) long. A "good" antenna would be 30.48m (100 feet). The video uses an antenna of only 12 meters (40 feet) and it works OK. WARNING - Never run antennas over or near power lines or electric wires. Serious injury or death may result. If you don't know, learn or don't do it. ORIGINAL ARTICLE "The Crystal Radio", Dave Evison, W7DE, QST December 1997, pp. 56-57. This article's design is based on one from the 1930's by Elmer G. Osterhoudt OTHER CRYSTAL RADIO VIDEOS - A comparing 2 designs, one better than the other https://www.youtube.com/watch?v=i2PITPUg2vI&t=2s - Crystal Radio Powering a Joule Thief https://www.youtube.com/watch?v=xn7U16j7IsU - Popular Crystal Radio Design That Does Not Work https://www.youtube.com/watch?v=i2PITPUg2vI&t=2s - New Crystal Radio Design https://www.youtube.com/watch?v=ls-28o2pKbQ - World's Simplest (Crystal) Radio https://www.youtube.com/watch?v=GdvKDFz9Xi4&t=27s - Crystal Radio Improvements & Upgrades https://www.youtube.com/watch?v=Bfr9_LKWLvI - Connect DC Amplifier to Crystal Radio https://www.youtube.com/watch?v=HOw3yDFXXN4&t=9s
Просмотров: 22536 tsbrownie
How to Build: Ham Radio 2 Meter Quarter Wave Antenna
 
16:35
Is your Ham Radio HT rubber ducky letting you down? Do you want to transmit a stronger signal to the repeaters? If so, I'll show you how to build a two meter quarter wave ground plane antenna. It is simple, low cost and quick to build. Give it a try, build one. Length in feet = 234 / Frequency in MHz. To convert feet to inches, multiply the length in feet by 12 to get inches. Metric: length is 0.485 meters. Parts, 6-32 hardware SO-239 connector Wire or welding rod for the elements. Coax cable to run to your radio. You may need an adapter to connect to to your radio.
Просмотров: 157541 K7AGE
Ham Radio Shed Shack | Outdoor Building | Man Cave Build TOUR!
 
16:08
Connect with me: ►Instagram: https://www.instagram.com/m3hhyofficial ►Facebook: https://www.facebook.com/M3HHY ►Twitter: https://www.twitter.com/OfficialM3HHY ►Zello: RMComms ►Youtube: https://www.youtube.com/user/RINGWAYMANCHESTER/videos ►Youtube: (Second Channel) https://www.youtube.com/channel/UCgmM3bprh_50fG-L-zG9XEQ/ ►Blog: https://www.distantsignalradio.blogspot.co.uk/
Просмотров: 2610 Ringway Manchester
Cree Overview of All New RF Components, Including Doherty Power Amplifier Designs at IMS2014
 
04:01
http://www.cree.com/RF Tom Dekker, director of sales and marketing for Cree's RF components, discusses the company's new products. These power amplifier products include plastic devices for telecom small cells, over-mold plastic devices for cellular infrastructure, plastic devices for L/S/C/X-band RADAR, as well as a new line of GaN HEMTs operating at 50V for broadband amplifiers and tactical communications.
Просмотров: 500 Cree, Inc.
Ham Radio - A simple magnetic loop modification with a big improvement!
 
08:58
The first simple change I've seen to really make a difference in magnetic loop performance. If you like my videos, please subscribe here: http://www.youtube.com/user/loughkb?sub_confirmation=1 If you want me to keep making more videos like this, consider becoming my patron at Patreon: http://www.patreon.com/kb9rlw/ Discuss this and other videos on Facebook: https://www.facebook.com/kb9rlw/ Hit me up on the echolink repeater down by my house: W9TE (Node: 519521)
Просмотров: 29739 Kevin Loughin
DIY LiFePO4 Battery Pack Headway 38120 Ham Radio QRP+128wh
 
29:25
Hello Operators For the ham radio operator in the field, portable battery power needs to be light enough, small enough, modular, have enough capacity,  and above all it should be possible to replenish it off-grid, and in the field. On September 28 2016, I published a prototype 4S lithium ion battery called QRP battery pack. I've field tested that pack for a year, before deciding to take what I've learned, applying it all to two new portable power systems. This project takes the original concept a little bit further  by introducing lithium iron phosphate cells of various capacities,  as a power supply for the off-grid field operator. IMHO, this is less of a battery pack, then it is a portable power system. This build can power a QRP Radio or rig pulling up to 10A current draw. Plan for this project are two different builds - 4S1P/4S2P 10Ah/20Ah LiFePO4 based on Headway 38120 cells with battery management board and dell balancing. This Pat can be upgraded for a 100w radio, or extended for maximum capacity and runtime. - 4S1P/4S2P 2.5Ah/5Ah LiFePO4 pack based on A123 cells, with battery management board and cell balancing. Each pack can be customized  by the builder for increased capacity/output rating by adding addition cells in parallel, and upgrading the BMS. The ability to charge in the field with a solar panel or other DC source, means you stay in the field longer, while carrying less gear. The next video of the series, we will take the entire system out to the field, along with a PowerFilm F15 1200 thin film flexible solar panel. In the third video in this series, we will build a 5 amp power lithium iron phosphate battery pack based on A123 cells. That fact will be especially interesting for the Sota operators or qrp campers & hikers, looking for a lightweight renewable power source for the summit or the trail. - Episode notes can be read at http://oh8stn.org/blog/2017/09/07/portable-power-for-qrp/ - The Portable Solar Powered GoKit can be found here: https://youtu.be/1_-Q0ORT93M - The Man portable off-grid power for amateur radio articles can be foubd here: http://oh8stn.org/blog/2017/07/05/man-portable-off-grid-power-for-amateur-radio-introduction/ - If you found this episode useful, consider dropping a buck in the tip-jar here: https://paypal.me/oh8stn/1USD 73 Julian oh8stn
Просмотров: 29826 OH8STN
Ham Radio - Build your own QRPp CW transmitter
 
26:24
I build up a very low power crystal controlled CW transmitter and make a contact with it. If you like my videos, please subscribe here: http://www.youtube.com/user/loughkb?sub_confirmation=1 If you want me to keep making more videos like this, consider becoming my patron at Patreon: http://www.patreon.com/kb9rlw/ Discuss this and other videos on Facebook: https://www.facebook.com/kb9rlw/ Hit me up on the echolink repeater down by my house: W9TE (Node: 519521)
Просмотров: 20777 Kevin Loughin
Guitar Amplifier Chassis Build
 
19:08
Building a clone of the famous 5 watt Fender Champ 5f1 chassis tube amplifier. I built the metal chassis completely from scratch - it turned out ok. I had most of the big parts lying around for various ham radio projects but decided to make an amplifier with them instead.
Просмотров: 3335 Steven Lawson
How to Make/Build a Crystal Radio
 
11:45
Step-by-step instructions for making a tunable crystal radio. This is a radio that gets its power from the radio waves. I made it almost entirely from junk except for the diode (1N34 germanium diode) and the earpiece (though you can use a speaker from a phone instead.) The capacitor is made from aluminum foil and a paper towel roll. The coil is rolled on a toilet paper roll. The wire is enameled magnet wire. For the antenna I use a 15 foot wire laid out on the floor. For the earth ground I connect a wire to the ground in the household wiring. I originally got this circuit from the book "Radio Receiver Projects You Can Build" by Homer L. Davidson. For this circuit, the diode must be germanium. The following is a partial list of germanium diodes that should work: 1N34A, 1N60, 1N91, 1N119, 1N270, 1N277, 1N283 The following are not germanium diodes and may need a long antenna or a powerful radio station nearby to work: 1N4148 (silicon, found on a lot of circuit boards), B16 (zener diode), 1N5060 (avalanche diode) The crystal earpiece (piezoelectric earphone) and/or 1N34 germanium diode and/or air core variable capacitors can be ordered from most of these sources: http://www.midnightscience.com http://www.scitoyscatalog.com/category/R.html (their variable capacitor is for if your coil has a ferrite core and is smaller than the one in this video) http://www.maplin.co.uk/p/mono-crystal-earpiece-with-35mm-jack-plug-r62gk You can find the circuit diagram shown in this video on this page: http://rimstar.org/equip/crystal_radios.htm See also: How a Crystal Radio Works http://youtu.be/0-PParSmwtE Crystal Radio Troubleshooting and Tips http://youtu.be/HZZmKZJrIW0 Make Crystal Earphone/Earpiece for Crystal Radio http://youtu.be/OVapqz4yBCY Use Earbuds/Earphones with Crystal Radio http://youtu.be/GCh2LVHUavQ Make a Crystal Radio Coil with Taps http://youtu.be/Gi9EmhrcfIg Make Razor Blade Diode for Crystal Radio/Foxhole Radio http://youtu.be/eIdHsjfbckw How to Make Crystal Radio Amplifier for Speaker http://youtu.be/JtPwxbOgBHw How to Make Amplifier for Crystal Radio Earphone http://youtu.be/cQ-LxMDrD_o Steps for How to Make Amplifier for Crystal Earpiece http://youtu.be/V0dKdSNv_dY How to Make an AM Radio Transmitter (so you can transmit to your crystal radio) http://youtu.be/_4-Sx-T6VBc Amplitude Modulation with Simple AM Radio Transmitter http://youtu.be/R04yEKqgGPc Follow me on Twitter: https://twitter.com/#!/RimStarz - http://rimstar.org
Просмотров: 687162 RimstarOrg
My 1st Homemade Hf amp. 1kw+ from 1X 3-500Z tube 160 through 10
 
04:57
This was my very first HF amplifier build. It will work 160 meters through 10 meters and output power is slightly over 1000 watts. The plate transformer is 2610 volts at 500 milliamp continuous duty. After full bridge rectification the plate voltage is 3550 volts. At the time of the video the amplifier is operational on 10 meters and about 90% complete. Now in the process of finishing this amplifier and building a 4 - 1000 amplifier as well. The single 4-1000 should do 5000 watts peak and about 2600 RMS. For the 4-1000 amp it will be powered by a 3amp @ 2000v Peter Dahl. It will be ran on a doubler so the plate voltage will be around 5700VDC. If there are enough views and requests for a follow along on the 4-1000 amp I will do videos of my step by step progress. 73
Просмотров: 4591 Nelson antennas
EEVblog #629 - How To Design a Microphone Preamplifier
 
30:55
Part 7 of Microphone Technology with Doug Ford, former head designer at Rode Microphones. This video Doug takes you through the design of the Rode NT3 and NT1000 microphone designs. There is a ton of stuff in here: Closed loop unity gain JFET and bipolar follow circuits. Bootstrapping out miller capacitance. JFET biasing. How to eliminate expensive high value resistors. How to add a bridged-T network to add marketing "pizazz" to a microphone. How to stop oscillation in closed loop systems. How to test and design closed loop systems for stability. Dominate pole compensation. Traps for young players in power amplifier stability. How circuits with capacitive loads oscillate. Emitter degeneration. Parasitic inductances and their effects. How to design a low noise and ultra high dynamic range valve based microphone preamplifier. Microphone power supplies. And how to design an amplified zener current source. All other videos in this series are HERE: https://www.youtube.com/playlist?list=PLvOlSehNtuHv98KUcud260yJBRQngBKiw Forum HERE: http://www.eevblog.com/forum/blog/eevblog-629-how-to-design-a-microphone-preamplifier/ EEVblog Main Web Site: http://www.eevblog.com EEVblog Amazon Store: http://astore.amazon.com/eevblogstore-20 Donations: http://www.eevblog.com/donations/ Projects: http://www.eevblog.com/projects/ Electronics Info Wiki: http://www.eevblog.com/wiki/
Просмотров: 87633 EEVblog
Best DIY Indoor Or Outdoor TV Antenna Ever Made
 
20:46
In this video I will show you how to make the best DIY TV antenna that you can make. This TV is a all around very good small TV antenna you can make. This TV antenna will make a good indoor or outdoor TV antenna. The antenna has a RCA Booster that goes with it. Best DIY Indoor Or Outdoor TV Antenna Ever Made . by Danny S. Hodges
Просмотров: 381998 Southern Ideas
Eimac 3-400Z Grounded Grid Linear Amplifier Build For Amateur Radio - Part 2
 
08:12
I forgot to include the circuits underneath the chassis and also wanted to add in the performance of the Eimac 3-400Z triode.
Просмотров: 3465 ElPaso TubeAmps
Full-Sized 160m Aluminium Trussed Dipole Antenna Question for Ham Radio
 
16:28
John dropped me a line asking about a plan he had for a massive dipole for 160m. Crazy? Actually, since there is no such thing as a stupid question, no it isn't. John clearly has a plan (or an aspiration). Who am I to say he can't do this. Of course, it would be much more economical to put an inverted V dipole over one of his trees. Then maybe a vertical and / or a 4-square? Anyway, you decide :) Me: My name is Callum, callsign M0MCX. The whole DX Commander brand was a bit of an "accident" since I already have 2 day-jobs (I own a couple of tech companies). Everything I make, I use myself. My products are the answer to *my* problems so I made stuff that worked for me. I don't make gear that doesn't work and although I'm considered not short of a few dollars, I love the idea of making things economical, easy to build and as efficient as you can achieve on a tight budget (hey, I hate wasting money!). My store is here: https://www.m0mcx.co.uk/store/products/ and I ship (almost) worldwide. Russia seems to be too expensive however EU, USA, Canada and VK land still make my products economical when you include shipping. Hey. Did you know that you can help the others here by contributing your time to closed caption subtitles here: https://www.youtube.com/timedtext_cs_panel?tab=2&c=UCEWRZEIjVQB8aUkyUQ-g-zA Enjoy your radio folks. Good luck. Callum. M0MCX. DX Commander Founder.
Просмотров: 3604 DX Commander
How To Make The Ultimate TV Antenna Revised
 
24:51
This video is a updated version of the Ultimate TV Antenna I made a year are so back. This is How To Make The Ultimate TV Antenna Revised with all the new updates I have made to the Ultimate TV Antenna. I will show you step by step how to make this TV antenna.
Просмотров: 70283 Southern Ideas
Ham radio mic with boom arm and DIY Hand PTT for less then $60 !
 
10:54
In this video, I demonstrates how to get for less then $60 a ham radio microphone with a boom arm and DIY (do it yourself) hand PTT. If you like please subscribe! Keep in mind that you also need to verify your radio connection prior of connecting a new mic. As an example, Icom rig required a capacitor to prevent shorting the power (+8V DC) straight to ground, without the proper capacitor this could damage your radio. 73 Pascal VA2PV Behringer XM1800S microphone (3 x mic for $39.99 USD) https://www.amazon.com/Behringer-Ultravoice-Xm1800s-Dynamic-Microphone/dp/B000NJ2TIE/ref=sr_1_1?ie=UTF8&qid=1491083297&sr=8-1&keywords=xm1800s Neewer Microphone suspension boom scissor arm stand ($15.99 USD) https://www.amazon.com/Neewer-Adjustable-Recording-Microphone-Suspension/dp/B00DFU9GTS/ref=sr_1_32?ie=UTF8&qid=1491083341&sr=8-32&keywords=neewer+boom Shock mount ($3.78 USD) https://www.amazon.com/Microphone-Shock-mount-Shockmount-microphone/dp/B011BH9HTA/ref=sr_1_49?ie=UTF8&qid=1491083441&sr=8-49&keywords=shock+mount+mic
Просмотров: 10411 Laboenligne.ca
How to Design an RF Power Amplifier: Class A, AB and B
 
12:45
To download the project files referred to in this video visit: http://www.keysight.com/find/eesof-how-to-pa This video will provide an introduction to the most basic modes of power amplifier operation by first building a nonlinear device model from scratch and then using this model in a circuit simulation environment to demonstrate various modes of power amplifier operation. This approach will allow us to discover unique insights into the fundamentals of Class A, Class AB, and Class B operation and will also help more experienced circuit designers to understand why it can be so difficult to achieve such idealized performance in practice.
Просмотров: 53843 Keysight EEsof EDA
Easy External Scanner Antenna for Police, Fire, EMS
 
04:32
Easy External Scanner Antenna for Police, Fire, EMS
Просмотров: 91154 drez20001
Build a Tube Type Linear Amplifier for CB or other HF Bands Part 1
 
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Linear Amplifier Building 101 This is the first video of this series showing the tube types and the circuit that I will be working with. If you would like to request info on or about a specific tube / circuit or vote for a video on one of the tubes that I have listed, you may send me an email at: radiomedic111@hotmail.com Watch Part 2 Here: https://www.youtube.com/watch?v=oAxL0DLzAgE
Просмотров: 5060 radiomedic111
How to Design an RF Power Amplifier: The Basics
 
12:35
To download the project files referred to in this video visit: http://www.keysight.com/find/eesof-how-to-pa-basics To apply for free trial of ADS visit: http://www.keysight.com/find/mytrial.rfmw.sm This video will provide a foundation for understanding how power amplifier circuits work. If you are new to High-Frequency Power Amplifier Circuit Design, this is the place to start. If you are an experienced designer, this video will provide unique insights in the fundamentals that you may not have seen before. Questions which will be answered include: what is AC power?, how is ac power generated and dissipated?, what topologies are convenient to use for power amplifier circuits? what is a loadline and how can this be used to design a power amplifier?
Просмотров: 148446 Keysight EEsof EDA
Simple Homebrew SSB Base Rig Part 8 - RF Power Amplifier
 
31:05
Seasons Greetings! First off a caveat that I am no expert in RF design. Right or wrong, this is a video of the approach I have taken for the design of the RF power amplifier. There will no doubt be errors. It's all about learning for me. The amplifier is spread across three stages, with an output around 5W. Apologies that the video is so long, but the aim of this video series is to look at the maths behind the designs. Hopefully, you will find it useful. The final toroid was not specified in the video. It's a FT50-43.
Просмотров: 647 Charlie Morris
HOW TO BUILD A 6 METER PLUS ANTENNA - Raymond Jackson ( kb9col )
 
18:02
Raymond Jackson ( kb9col ) is showing how to build your own 6 METER PLUS antenna. This is a great step by step instructional video. The Length of the 75 ohms coaxial cable " each " is 32 inches. This is from the tip of center " Male " ( Hot ) pin of the PL 259 to the tip of the eye solder terminal . Raymond Jackson: kb9col@gmail.com
Просмотров: 3843 Raymond Jackson
How to repair DD M4a amplifier?! Walkthrough
 
50:35
DD M4a amplifier in for repair! This video will guide you though some of the things to look out for when attempting a repair on this amplifier or boards with a similar topology.
Просмотров: 3156 barevids
RF Power Amplifier Designers
 
00:31
http://www.keysight.com/find/eesof-LearnPAdesign You design the power amplifiers in tomorrow's technology, and Keysight is here to support you with our "how to" video series on RF Power Amplifier Design. Watch experienced RF Design Engineer, Matt Ozalas, as he shares his unique design methodology to provide you with building blocks for more complex PA classes. Download Matt’s easy-to-use PA workspaces to save time by starting out with a good circuit topology. Go here http://www.keysight.com/find/eesof-LearnPAdesign to learn more.
Просмотров: 8625 Keysight EEsof EDA
G-Eazy & Halsey - Him & I (Official Video)
 
04:47
New Album ‘The Beautiful & Damned’ Available Everywhere http://smarturl.it/TBAD Get exclusive TB&D bundles here: http://smarturl.it/TBAD/officialstore Subscribe for more exclusive G-Eazy footage: http://bit.ly/GEazyYTSub G-Eazy Official Site: http://g-eazy.com/ G-Eazy On Twitter: https://twitter.com/G_Eazy G-Eazy On Facebook: https://www.facebook.com/G.Eazy G-Eazy on Instagram: https://www.instagram.com/g_eazy
Просмотров: 283660003 GEazyMusicVEVO
How to fix Tube Phono Guitar amp Motorboating Precision Electronics S10
 
08:37
Recently purchased this cool 6BQ5 amp at a radio swap meet. Yes, I planned to repair this amp, however due to unforeseen circumstances, the repair actions were cut short. Unfortunately the cause for the motorboating was due to a damaged output transformer. I may have been slightly taken at the radio sale event, however this amp is related to Western Electric, so I should be able to recover the loss and maybe make a few $$ on the deal after all. I do not plan for this amp to meet its end. It will live on as a fine guitar recording amp. Stay tuned. TD
Просмотров: 4090 D-lab Electronics
Homebrew 80/40m SSB/CW Rig - #1 Design Thoughts and Ideas
 
12:51
Video looking at the design thoughts and ideas for the next build. The plan is to build a 80/40m SSB/CW base rig, utilising homebrew DBMs and homebrew crystal filters. Also keen to use a push pull audio amplifier. Please let me know if this will be of interest.
Просмотров: 498 Charlie Morris
Advanced 2 kW X-band Solid State High Power Amplifiers
 
01:29
This X-band high power amplifier provides the industry's best power density in the frequency range of 8-11GHz. All designs build upon our patented Dodecahedron package designed to pack a considerable amount of power in a small footprint.
Просмотров: 738 Analog Devices, Inc.
How to Read a Schematic
 
04:53
How to read a schematic, follow electronics circuit drawings to make actual circuits from them. This starts with the schematic for a very simple circuit with just some batteries, resistor, switch and an LED. Then it talks about Earth ground and chassis ground. Finally it moves on to a crystal radio amplifier schematic and adds a diode, potentiometer and capacitors. For more electronics symbols, see my webpage here (more coming soon): http://rimstar.org/science_electronics_projects/electronic_symbols_for_schematics.htm Support RimstarOrg on Patreon https://www.patreon.com/user?u=680159 Subscribe for new videos every week http://www.youtube.com/user/rimstarorg?sub_confirmation=1 Go to the main channel page here https://youtube.com/rimstarorg See also: How to Make Crystal Radio Amplifier for Speaker (1280x720) https://www.youtube.com/watch?v=JtPwxbOgBHw How to Make Joule Thief Light a CFL - Jeanna's Light (1280x720) https://www.youtube.com/watch?v=FkLET8MhRbU 555 Timer Chip Music Player for Maker Faire (1280x720) https://www.youtube.com/watch?v=WM1bZgBqDl4 Follow behind-the-scenes on: Twitter https://twitter.com/#!/RimStarz Google+ https://plus.google.com/116395125136223897621 Facebook https://www.facebook.com/rimstarorg http://rimstar.org Music used throughout except endboard: Bicycle Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 3.0 http://creativecommons.org/licenses/by/3.0/ ISRC: USUAN1100870 Music used during endboard: A Darker Heart - music by audionautix.co
Просмотров: 210496 RimstarOrg
"Simple, Powerful, Cheap" Amplifier
 
03:14
"Simple, Powerful, Cheap" AmplifierLow-frequency amplifiers differ by their technical capabilities, ie, the characteristics, design, and the assembling details. The latter is especially important for a home-made one. Modern technology helps Russian fans of radio electronics to assemble a low-frequency amplifier, quickly and does not require any special components. Indeed, chips suggested by the trading companies require a minimal number of external components. Therefore, usually it will not take much time and money to build a quality amp. The most important initial data you need to know is: your source of sound, the kind of supply you are planning to use and the anticipated sphere of application of your amplifier. Based on this, we try to define necessary characteristics of the amplifier and select the corresponding scheme. There are many variants of possible designs. Let's stick to the amateur variant which we can name "Simple, powerful, cheap". So,One of these variants is a low-frequency amplifier based on a chip TDA8560Q ...The amplifier has an output power of 40 watts per channel when using 2 ohm speakers. If standard 4 Ohm speakers are used, the output power will be 2 times lower. But high power is not the only amazing feature. To build this amp in addition to the chip you need just three external components, and they are so tiny that you might not see them. ... Assembling is very simple ... You can make it even easier, if you mount the chip directly on the chassis, this will be better than any radiator. Then solder the external elements directly to ship's pins.Frequency range is from 20 Hz to 20 kHz which makes it possible to use this amplifier not only in the car, but also at home... Output stage of the chip is implemented according to the bridge circuit .... .The power supply is 12 -14 Volts...So, now just connect the player, the speakers ... ... and listen to your favorite music ...
Просмотров: 143202 ChipDipvideo
HF Amp Pi Tank And Input Coil Formers.
 
13:43
I got a couple more componenets for the HF amplifier project. A couple of coil formers for my input and output circuits. And... I'm thinking of using 30m of stainless steel wire rope as a random wire antenna.
Просмотров: 2963 VK6CS
How to build an All-Band Ham Radio Vertical with the DX Commander 2018 spec
 
17:34
I let you see one of my packed boxes, with all the tricky components for the DX Commander 10mDXC ABV (all band vertical). Feel free to make your own. ALl the published data is on my website (www.m0mcx.co.uk) under User Guides. Alternatively, support me and this channel by purchasing an ABV from me. If you do make your own, it would be generous of you to give me some of the inspirational credit by either mentioning my callsign or DX Commander All Band Vertical (ABV..?). Anyway, I trust this will give you some inspiration. Further, I answer some of the FAQs I often get asked on email. Background: My name is Callum, callsign M0MCX. The whole DX Commander brand was a bit of an "accident" since I already have 2 day-jobs (I own a couple of tech companies). Everything I make, I use myself. They were the answer to *my* problems so I made stuff that worked for me. I don't make stuff that doesn't work and although I'm considered not short of a few dollars, I love the idea of making things economical, easy to build and as efficient as you can achieve. My store is here: https://www.m0mcx.co.uk/store/products/ and I ship (almost) worldwide. Russia seems to be too expensive however EU, USA, Canada and VK land still make my products economical when you include shipping. Hey. Did you know that you can help the others here by contributing your time to closed caption subtitles here: http://www.youtube.com/timedtext_cs_panel?tab=2&c=UCEWRZEIjVQB8aUkyUQ-g-zA Enjoy your radio folks. Good luck. Callum. M0MCX. DX Commander Founder.
Просмотров: 6501 DX Commander
Ham shack emergency power, 12 volt, 420 amp hours total 6 AGM battery, Solar plug S400 Power supply
 
07:45
Greetings, The entire shack is fed by 12 volt battery bank, kept alive by a combination of 550 watt solar panels, a pair of 400 watt switching power supply (MegaWatt S400) and for backup, a feed from my mobile unit capable of long term idling with a 130 amp alternator. (Crown Victoria) The video shows me switching back on to grid feed, after being off-grid for almost 7 hours as a test. The battery bank wasn't down much, about 12.4 volts and the power supply was delivering 260 watts when activated as seen on the KilloWatt readout. If the bank is down alot further, the S400 power supply will deliver exactly 400 watts input, for a couple of hours, then it will taper off as the battery bank comes up to my setpoint of 13.3 volts. The power/wattage readout to keep everything running, and the battery bank level is about 155 watts. With this arrangement, If the grid power goes off, nothing has to switch over, it's already running on battery all the time. When grid goes, the battery bank simply starts to discharge and the voltage will very slowly start downward. I have a solid 24 hours of run time with the current configuration. More about this shack configuration in my amazon Ebook here: https://www.amazon.com/radio-license-What-Sanders-AG6IF-ebook/dp/B00IB4AT1M/ref=sr_1_1?ie=UTF8&qid=1485744610&sr=8-1&keywords=ag6if or put my callsign, ag6if, into the amazon search box. or on my QRZ page at https://www.qrz.com/db/AG6IF Radio list from left to right: Kenwood 261 echolink and VOIP multimode TNC Icom 718 and SCS tracker Robust packet APRS iGate 10.147.30 Yaesu ft2600 Kantronics 9612 packet radio 145.050 ag6if-7 -1 ADI AR247 220mhz Yaesu Ft2900 TinyTrak4 APRS iGate 144.39 Kenwood 805, IRLP node 7991 446.400 pl100 simplex Ultimate Beacon, 30m 10.142, wspr Yaesu Ft847 Kenwood D710 2m 440 Yaesu Ft897 Signalink 6m and 2m ssb Ameritron AL811 (not running on 12v but could be put on the Inverter if needed. Battery bank comprised of 120ah AGM 120ah AGM 40ah AGM 80ah Sealed Lead acid 40ah AGM 40ah AGM Audio panel. Alto 6x2 Mixer Homebrew 6 channel mixer Audio out to Recoton Wireless Speakers, positioned throughout the house, workshop and shack. 73 Jim
Просмотров: 887 James Sanders
#43: Six foot AM loop antenna
 
14:56
Box loops are some of the oldest and simplest receiving antennas. They can give excellent performance and are easy to build; several commercial versions are on the market as well. In this video, we demonstrate a very quickly constructed square loop antenna, 6 foot on each side. There are *many* resources online for these antennas, including: * AM loop antenna calculator, http://www.am-dx.com/loop_calc.htm * Antenna plans and instructions, http://earmark.net/gesr/loop/amloop4.htm * Illustration of loop antenna resonance, http://www.earmark.net/gesr/loop/ * Explanation of the Tecsun signal strength indicators, http://radio-timetraveller.blogspot.com/2015/01/the-ultralight-db-mystery-s-meters-and.html and http://radio-timetraveller.blogspot.com/2015/02/the-db-versus-dbu-mystery-signal.html
Просмотров: 6066 Radio Physics and Electronics
N6QW's Simpleceiver - with RF preamp, audio amp - loud and working!
 
05:24
N6QW's Simpleceiver project - build 2 by KK6FUT, with RF preamp and audio amp. Note: that audio amp is *loud*, so if you're not getting a lot of output, check your circuit. I had a broken capacitor (?!?!?!) in the build before, this one is room shattering loud. Running on 40m without a bandpass filter (watch those AM shortwave stations). My plan is to build a 15 or 17m transceiver out of this as Pete gets there on the full design.
Просмотров: 585 AI6YR
Installing an Amplifier? MOUNT THE FUSE CORRECTLY! - Jeep Build - CarAudioFabrication
 
12:20
When you install a car audio amplifier you MUST add a fuse to the main power lead. The fuse should be as close to the battery as possible. But sometimes it's hard to determine: Where do you mount the fuse holder in the engine compartment? In this video I make my own location by fabricating a fuse holder bracket and mounting it using a stock bolt location! A special thanks to Rockford Fosgate and Mobile Solutions for providing the gear and tools used in this video. ▼ ➜Materials and Tools List with Pics: http://goo.gl/1BBrHX ▼ Affiliate Product Links: ➜Dual Amp Install Kit: http://amzn.to/2bukEpe ➜ABS Plastic: http://amzn.to/1UhYItP ➜Silver Marker: http://amzn.to/28PFvtl ➜Special Plastic Jig Saw Blade: http://amzn.to/1Y3shFY ➜MS Smart Templates: http://goo.gl/E6Uo3O ➜MS Quick Radius Gauge: http://goo.gl/8mSNBo ➜MS Spiral Trim Bit: http://goo.gl/O6gbaJ ➜MS Chamfer Bit: http://goo.gl/lteosE ➜Router Push Bloc: http://amzn.to/1V9SxaA ➜Router: http://amzn.to/266spc6 ➜Template Tape: http://goo.gl/nmOLlK ➜Center Punch: http://amzn.to/1SddSyf ➜Drill and Tap Set: http://amzn.to/28PFLZ9 ➜Olfa Knife: http://amzn.to/1Sn5xwG ➜FREE weekly training program: http://goo.gl/5T4D7v ➜Box Designs http://goo.gl/sv1wam ➜Join Patreon! https://goo.gl/2jMVZ6 Here at Car Audio Fabrication I teach you how to Master Car Audio in an effort to Design, Build, and Install your ideal car audio system. Whether you are a hardcore basshead or a HiFi focused audiophile I would love to have you subscribe and join our community! --SUBSCRIBE-- http://www.youtube.com/subscription_center?add_user=caraudiofabrication --SUPPORT THE MAKING OF CAF— Early Access to Videos, Secret Videos, Direct Messaging for Questions: Patreon CAF Insider Group: https://www.patreon.com/caraudiofabrication --LET”S CONNECT!— Website: http://www.caraudiofabrication.com/ Facebook: http://www.facebook.com/caraudiofabrication/ Instagram: @caraudiofab Snapchat: @caraudiofab --FULL VIDEO SERIES-- Simple Door Pods [VIDEO] Series: http://goo.gl/jPpKGB Custom Subwoofer Box [VIDEO] Series: http://goo.gl/bzZPwl Underseat Fiberglass Sub Box [VIDEO] Series: http://goo.gl/OBbUwH Fiberglass Door Pods [VIDEO] Series: http://goo.gl/oAdrx1 Music by: Otis McMusic – YouTube Audio Library Switch It Up – YouTube Audio Library Proctor – YouTube Audio Library Licensed under Creative Commons: By Attribution 3.0 Car Audio Fabrication – Master Car Audio – Design, Build, Install
Просмотров: 240474 CarAudioFabrication
Altoids 15-20W PA Smoketest (RF Amplifier In Altoids Tin)
 
09:25
I'm just firing this unit up, but I have to check my connections. I can pass signal, and the trimmers are responsive, but no gain. This is an amateur radio amplifier designed to boost the signal of the popular ATS3B QRP (low power) transceiver. It was designed by Japanese ham JN1GLB and released in a very small run in Japan. The full plans and assembly instructions are found on the AT Sprint QRP y a h o o group by the same name. Cheers! 7J1AWL/KC7FYS PS. I am a fairly inexperienced ham with knowledge of RF theory a bit on the paltry side. This smoke test shows that the Altoids PA was load mismatched, or wouldn't transmit into the dummy load I was using. I sent the unit to JN1GLB for calibration, and found that I'd actually done it right. The problem was that I wasn't using an actual antenna. When I transmitted into my dipole (which oddly enough is resonant somewhere around 6.5Mhz...) through an MFJ antenna tuner, I got a full 20watts out. Nice amplifier for when QRP just ain't cuttin' the mustard.
Просмотров: 15529 JC Haywire