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References: [ +from:alan@g3xaq.demon.co.uk: 9 ]

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1. [Amps] Drake L-4B PSU burned resistor (score: 1): Author: Alan Ibbetson <alan@g3xaq.demon.co.uk>; Date: Mon, 31 Oct 2005 20:59:44 +0000; I recently got a Drake L-4B amplifier. I've been using (abusing) it a couple of weeks on CW on the high voltage SSB position. Pretty much everybody seems to do this. After all, it's only running 2500; /archives//html/Amps/2005-10/msg00730.html (7,520 bytes)
2. Re: [Amps] Drake L-4B PSU burned resistor (score: 1): Author: Alan Ibbetson <alan@g3xaq.demon.co.uk>; Date: Tue, 1 Nov 2005 23:09:34 +0000; No hi-pot tester here, but seeing as the valves are somewhat low on emission I might invest in a pair of new ones on my trip to CA next week. They measure OK. The 10 or 14 watt ones commonly availabl; /archives//html/Amps/2005-11/msg00017.html (8,027 bytes)
3. [Amps] Drake L-4B fan - too small and too slow? (score: 1): Author: Alan Ibbetson <alan@g3xaq.demon.co.uk>; Date: Wed, 28 Dec 2005 21:05:37 +0000; Having replaced the 0.82 ohm fuse with a proper glitch resistor in the HT supply of my L4-B, like y'all advised, I've been continuing to abuse my Drake L-4B amplifier on CW. As I said a while ago, do; /archives//html/Amps/2005-12/msg00365.html (8,617 bytes)
4. Re: [Amps] Drake L-4B fan - too small and too slow? (score: 1): Author: Alan Ibbetson <alan@g3xaq.demon.co.uk>; Date: Fri, 30 Dec 2005 09:17:47 +0000; Thanks for all the help and advice. Although muffin fans on top will help clear hot air out of the case, the off-list consensus is that they won't do much to cool the valve seals. A big muffin fan mi; /archives//html/Amps/2005-12/msg00383.html (8,719 bytes)
5. [Amps] Drake L-4B fan replaced with Dayton 4C761 (score: 1): Author: Alan Ibbetson <alan@g3xaq.demon.co.uk>; Date: Tue, 14 Feb 2006 22:49:20 +0000; Late last year I was complaining that the fan in my L-4B was not keeping the valves within their temperature rating with 50Hz mains, especially on CW at full power. Jason N1SU suggested that I replac; /archives//html/Amps/2006-02/msg00262.html (8,208 bytes)
6. [Amps] Panel lettering, scales, dials, etc (score: 1): Author: Alan Ibbetson <alan@g3xaq.demon.co.uk>; Date: Mon, 27 Feb 2006 18:40:36 +0000; I would like to create a front panel for my latest homebrew project with better markings than my usual Dymo tape ugliness. I've located some material called Water-slide Decal Paper that I think could; /archives//html/Amps/2006-02/msg00625.html (7,073 bytes)
7. Re: [Amps] Panel lettering, scales, dials, etc (score: 1): Author: Alan Ibbetson <alan@g3xaq.demon.co.uk>; Date: Wed, 1 Mar 2006 23:11:31 +0000; I asked with bill, band [Summary: I like Front Panel Designer best. It is free from http://www.frontpanelexpress.com/ ] In detail: In addition to the recommendations on the list, I also received off-; /archives//html/Amps/2006-03/msg00012.html (11,227 bytes)
8. [Amps] Switching off Drake L-4B occasionally trips mains RCD (score: 1): Author: Alan Ibbetson <alan@g3xaq.demon.co.uk>; Date: Wed, 3 Oct 2007 22:25:06 +0100; As is common in the UK, the mains supply for my whole house is protected by an RCD (see http://en.wikipedia.org/wiki/Residual-current_device for a description). I think they are called GFCIs in the U; /archives//html/Amps/2007-10/msg00028.html (7,682 bytes)
9. [Amps] Value of Ia at Vg1=Vg2=0 for an 8171? (score: 1): Author: Alan Ibbetson <alan@g3xaq.demon.co.uk>; Date: Fri, 7 Dec 2007 17:26:00 +0000; Anyone have an 8170 or 8171 hooked up in a circuit where they tell me the standing anode current, at 5 or 6KV anode voltage, when both the grid and screen are grounded? Unsurprisingly, the data sheet; /archives//html/Amps/2007-12/msg00032.html (6,549 bytes)

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