amplifier 20 m
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Antennas : Windom- OH7SV Matti Hohtola Ham Projects
- The most modern QRP transceiver in 2004,Direct Conversion HF Transceiver with DDS LO,
50 ohm to 200 ohm HF wide band transformers,
Wilkinson splitter for RX measurements,
Windom baluns 2001/2004,
Ferrite rod antenna for 80 meter, Magnetic Loop Antenna for 80 m, Mascot Switched PSU 9320 modification to 8A peak current, 150W MOSFET linear amplifier for 80m, 80 m HF SSB/CW Transceiver
[ Hits: 20374 | Votes: 36 | Rating: 8.11 ]
- QRO Technologies
- HF amplifiers manufacturer maker of HF-2000 RF power amplifier
[ Hits: 10794 | Votes: 17 | Rating: 8.35 ]
- NPR New Packet Radio - IP over 430 MHz
- NPR (New Packet Radio) is a custom amateur radio digital protocol, designed by F4HDK to transport bidirectional IP trafic over radio links on the 70cm band. This IP protocol is optimized for point-to-multipoint topology, with the help of managed-TDMA. Bitrate is up to 500kbps. Home Made modem has a built-in ethernet port to connect to PC. To boost power a DMR amplifier is required to reach 20W. This project is an extension of HSMM - Hamnet - AREDN networks
[ Hits: 151 | Votes: 0 | Rating: 0 ]
- Improving The Heathkit SB-200
- A QST article, hints and kinks on improving the SB-200 amplifier
[ Hits: 2757 | Votes: 1 | Rating: 1 ]
- Heathkit SB-220
- The Heathkit SB-220, two 3-500Z, amplifier made a notable impact in the world of amateur radio when it debuted in 1975.
Resources and modifications
[ Hits: 3825 | Votes: 2 | Rating: 5.5 ]
- 2 kW HF Amplifier Rebuild
- Heathkit SB-220 amplifier repaired at W8UM
[ Hits: 7642 | Votes: 6 | Rating: 5.17 ]
- QSK for the TL-922 and SB-220 mods
- Beautifully constructed amplifiers. Unfortunately, are not suited for high speed T-R switching, a necessary attribute for operating AMTOR, QSK-CW, or SSB-VOX modes.
[ Hits: 2980 | Votes: 7 | Rating: 8.57 ]
- N4ATS.com
- N4ATS - Devoted to the Yaesu FL-7000 Amplifier. I have been rebuilding, repairing, and applying modifications to the Yaesu FL-7000 amplifier for 15 years. Over 200 units completed and counting!
[ Hits: 2249 | Votes: 3 | Rating: 9.33 ]
- SB220 SB221 arcing problems improvements mods
- This article explores the claim an amplifier might arc from a parasitic oscillation, damaging capacitors, bandswitches, or other components.
[ Hits: 1309 | Votes: 2 | Rating: 10 ]
- K5LAD's 4-1000A Amplifier
[ Hits: 2254 | Votes: 17 | Rating: 8.7 ]
- Modifications to the Ameritron AL-1200 Amplifier
- This page describes two modifications W8WWV made to his AL-1200 amplifier. The mods were obtained from Ameritron, so they are official.
[ Hits: 3043 | Votes: 4 | Rating: 2.75 ]
- A low cost 600 watt ultra-linear amplifier
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- This compact little amplifier is the brain-child of Pat Murdoch, ZL1AXB, in Auckland, New Zealand. It is only 11" wide, 4" high, and 9" deep.
Operates for 40, 20, 17, 15, 12, and 10m
[ Hits: 32130 | Votes: 27 | Rating: 6.67 ]
- 1.5 to 30 Mhz RF Amplifier
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- This high range amplifier is very small [SB200 size] Vacuum variable input and output caps as well input and output switching.
[ Hits: 53859 | Votes: 43 | Rating: 3.82 ]
- A 20m monoband Power Amp
- The 20m monoband 4-1000 amplifier, by Jelmer (pa5r), Herman (pa0ten) and Frans (pa5ca)
[ Hits: 2891 | Votes: 2 | Rating: 9.5 ]
- Homebrew HF Amp with 3CX3000F7
- Grounded grid triode HF linear amplifier with pictures and schematics diagrams by W2DTC.
The amp design was for 160 80 40 and 20 meters
[ Hits: 3274 | Votes: 9 | Rating: 6.33 ]
- Ameritron AL-1200 to gs35b Conversion
- The Ameritron AL-1200 Amplifier is in current production. In its factory configuration it uses a single 3CX1200A7 (triode) tube, grounded grid configuration. Re-tubing the AL-1200 with a GS-35b with success.
[ Hits: 2659 | Votes: 2 | Rating: 4 ]
- 13cm RF Amplifier
- This amplifier uses two 60w Spectrian amplifier boards with the usual input and output hybrid coupler and combiner.
[ Hits: 421 | Votes: 1 | Rating: 10 ]
- 50 Mhz solid state 600W amplifier
- G3WZT John Matthews project of a 600 Watt solid state linear amplifier for the 6 meters band
[ Hits: 2178 | Votes: 0 | Rating: 0 ]
- A 20W Amplifier for 2 meters
- VU2RAR basic VHF power amplifier suitable for 144-146 Mhz output power can vary from 3 to 25 Watts.
[ Hits: 3042 | Votes: 5 | Rating: 6.6 ]
- 144 MHz preamplifier with BF981
- Design of a preamplifier for 144 MHz with 1 dB NF and 23 dB gain using BF981. This amplifier is using a low cost silicon MOSFET (BF981 from Philips) to give more than 20 dB gain with around 1 dB noise figure on 2 meter.
[ Hits: 17963 | Votes: 28 | Rating: 5.82 ]
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