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Total 6 documents matching your query.

1. [Amps] L4B supply (score: 1): Author: mikflathead@aol.com; Date: Sun, 16 Feb 2014 15:27:12 -0500 (EST); I recently acquired a nice L4b amplifier. It has no tubes or supply. It is in very nice condition. If you were to build the "ultimate" supply for this what would you use for a transformer. I would th; /archives//html/Amps/2014-02/msg00152.html (6,358 bytes)
2. Re: [Amps] L4B supply (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Sun, 16 Feb 2014 16:17:14 -0500; Use a transformer from an Ameritron AL-572, it will give you very close to the original and not mess up the tubes load impedance. It is in the MFJ catalog and reasonably priced compared the new alter; /archives//html/Amps/2014-02/msg00154.html (7,630 bytes)
3. Re: [Amps] L4B supply (score: 1): Author: Paul Baldock <paul@paulbaldock.com>; Date: Sun, 16 Feb 2014 14:16:28 -0800; I run my L4-B at 800V (no load) above the original design. 3100V key down at .7A.1600W PEP out. It's been handling it fine for about 6 months now. I think the cooling is probably inadequate but I lik; /archives//html/Amps/2014-02/msg00156.html (8,824 bytes)
4. Re: [Amps] L4B supply (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Sun, 16 Feb 2014 21:51:43 -0500; You might run into plate choke heating if resonances atre close as well as switch arcing which seems to be common with that amp. I thru the calculator away several times and installed a LK-500 thru 8; /archives//html/Amps/2014-02/msg00158.html (10,146 bytes)
5. Re: [Amps] L4B supply (score: 1): Author: Paul Baldock <paul@paulbaldock.com>; Date: Sun, 16 Feb 2014 18:58:31 -0800; I replaced the original with the Ameritron one. It's a little tall so I added an insulator at the top otherwise a little pressure on the case would short it out. No arcs or sparks on any band includi; /archives//html/Amps/2014-02/msg00159.html (7,444 bytes)
6. [Amps] L4B supply (score: 1): Author: "Jim Thomson" <jim.thom@telus.net>; Date: Wed, 19 Feb 2014 06:10:09 -0800; keyed, but with no drive, just idle current) To keep the plate load Z the same... u would have to increase the plate current to .992 A The bandswitch in the L4B can only be pushed so far. Although it; /archives//html/Amps/2014-02/msg00167.html (7,667 bytes)

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