- 1. [Amps] AL82 3-500 4-400 (score: 1)
- Author: "Robert W5AJ" <woodr90@gmail.com>
- Date: Tue, 26 Jan 2021 14:35:03 -0600
- Have Ameritron AL82 amp, No Tubes Have extra Eimac 4-400 tubes Looked at some amp's schematics for 4-400 and appears these would work in AL82 Have fired up filaments in AL82 (no HV) Any one tried thi
- /archives//html/Amps/2021-01/msg00017.html (7,022 bytes)
- 2. Re: [Amps] AL82 3-500 4-400 (score: 1)
- Author: gudguyham via Amps <amps@contesting.com>
- Date: Tue, 26 Jan 2021 20:48:50 +0000 (UTC)
- 4-400 tube will work in an Al82. No problem. They will have less gain and less output but youll get power. Youll do better if you use less bias. Use it in SSB mode to up the idle current. There
- /archives//html/Amps/2021-01/msg00018.html (7,610 bytes)
- 3. Re: [Amps] AL82 3-500 4-400 (score: 1)
- Author: "Fuqua, William L." <wlfuqu00@uky.edu>
- Date: Tue, 26 Jan 2021 21:09:40 +0000
- Two things to watch out for. The 4-400A tubes are taller than the 3-500Z. Watch out for plate leads getting too close to top shield and the chimneys are too short. You could set the chimneys aside an
- /archives//html/Amps/2021-01/msg00019.html (11,614 bytes)
- 4. Re: [Amps] AL82 3-500 4-400 (score: 1)
- Author: Alek Petkovic <vk6apk@bigpond.com>
- Date: Wed, 27 Jan 2021 05:26:03 +0800
- I've run one in an AL80B, for testing purposes, while I was repairing the amp for another ham. I also plugged in a Philips equivalent of the 4-250A. Both the 4-400 and the 4-250 worked OK but with le
- /archives//html/Amps/2021-01/msg00020.html (7,995 bytes)
- 5. Re: [Amps] AL82 3-500 4-400 (score: 1)
- Author: Rob Atkinson <ranchorobbo@gmail.com>
- Date: Wed, 27 Jan 2021 09:39:20 -0600
- The 4-400A is really designed for chimney use. The base is made to direct air up around the pins and out at the side of the base so it can travel up between the bulb and the chimney wall to the anode
- /archives//html/Amps/2021-01/msg00022.html (7,605 bytes)
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