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1. [AMPS] amp project: 4-400s X 4 (score: 1): Author: Ku7i@worldnet.att.net (Lane Zeitler); Date: Fri, 6 Oct 2000 16:49:54 -0700; Gents, The new amp project is four 4-400s in parallel. I would like to talk with current or past builders of 4-400 rf decks for any advice. I pretty much have all of the data I need btwn the West Coa; /archives//html/Amps/2000-10/msg00120.html (8,074 bytes)
2. [AMPS] amp project: 4-400s X 4 (score: 1): Author: jeff@wa1hco.mv.com (jeff millar); Date: Sun, 8 Oct 2000 04:17:10 -0400; Here's an idea for a cheap screen supply. Start with the plate supply from a very old Motorola or GE VHF/UHF base station. They usually generate about 600V, 200W CCS. Pull out the 5R4's and replace w; /archives//html/Amps/2000-10/msg00121.html (9,189 bytes)
3. [AMPS] amp project: 4-400s X 4 (score: 1): Author: wc6w@juno.com (Radio WC6W); Date: Sun, 08 Oct 2000 10:37:03 EDT; On Fri, 6 Oct 2000 16:49:54 -0700 "Lane Zeitler" <Ku7i@worldnet.att.net> writes: with old to will Hi Lane, The tubes Cout will present no problem since the impedance of the combined tubes will be &fr; /archives//html/Amps/2000-10/msg00123.html (11,219 bytes)
4. [AMPS] amp project: 4-400s X 4 (score: 1): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Sun, 8 Oct 2000 16:48:00 +0100; Nice idea! You'll definitely need a bleed, because the results of the screen driving current back into a regulated switch-mode supply might be a little, er, unpredictable. One problem is that a volta; /archives//html/Amps/2000-10/msg00124.html (10,115 bytes)
5. [AMPS] amp project: 4-400s X 4 (score: 1): Author: wc6w@juno.com (Radio WC6W); Date: Sun, 08 Oct 2000 13:37:47 EDT; On Sun, 8 Oct 2000 16:48:00 +0100 "Ian White, G3SEK" <G3SEK@ifwtech.com> writes: better Hi Ian, I was worried current surges too; Before I tried it! When I first used this technique in my 4CX1500B am; /archives//html/Amps/2000-10/msg00125.html (10,634 bytes)
6. [AMPS] amp project: 4-400s X 4 (score: 1): Author: k7fm@teleport.com (Lamb); Date: Sun, 8 Oct 2000 18:51:03 -0700; Marv suggests using the old computer power supplies to provide regulated filament voltages for PA tubes. Marv, you really know how to spoil a guy's day. I collect old tubes, old transformers, old rad; /archives//html/Amps/2000-10/msg00130.html (8,726 bytes)
7. [AMPS] amp project: 4-400s X 4 (score: 1): Author: w7ti@jps.net (Bill Turner); Date: Sun, 08 Oct 2000 19:37:23 -0700; ______________________________________________________________ Tell her "if you ask me that one more time"...... :-) W7TI -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contestin; /archives//html/Amps/2000-10/msg00131.html (8,186 bytes)
8. [AMPS] amp project: 4-400s X 4 (score: 1): Author: Ku7i@worldnet.att.net (Lane Zeitler); Date: Sat, 7 Oct 2000 18:26:48 -0700; One of these days Alice......to the moon!!!!! Lane Ku7i -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problem; /archives//html/Amps/2000-10/msg00132.html (8,801 bytes)
9. [AMPS] amp project: 4-400s X 4 (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Mon, 9 Oct 2000 07:44:53 +0100; My screen supply is the old fashioned approach with a 5R4 rectifier. Choke input with negative lead filtering, and a 6X5 to rectify the ripple across the choke, thus providing bias. Bias supply regul; /archives//html/Amps/2000-10/msg00136.html (9,850 bytes)
10. [AMPS] amp project: 4-400s X 4 (score: 1): Author: wc6w@juno.com (Radio WC6W); Date: Mon, 09 Oct 2000 12:01:08 EDT; short, some you am Hi Colin, Well, you only need a couple of them. Incidently, I wasn't referring to the IBM PC style power supplies. I've only tried this trick with better built commercial supplies; /archives//html/Amps/2000-10/msg00148.html (9,781 bytes)
11. [AMPS] amp project: 4-400s X 4 (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Mon, 9 Oct 2000 17:15:26 +0100; Junk ceases to be junk when you dump it - and then find 30 minutes after the garbage truck came by that you need it! 73 Peter G3RZP -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amp; /archives//html/Amps/2000-10/msg00149.html (8,059 bytes)
12. [AMPS] amp project: 4-400s X 4 (score: 1): Author: wc6w@juno.com (Radio WC6W); Date: Mon, 09 Oct 2000 12:43:33 EDT; Choke input choke, Let's take up a (silicon) diode collection for Peter. :-) couple of NPN MJE340. And some HV FET's too! current, at My experience, too. plan is cold assembly filament. collapse as m; /archives//html/Amps/2000-10/msg00152.html (10,342 bytes)
13. [AMPS] amp project: 4-400s X 4 (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Tue, 10 Oct 2000 08:56:01 +0100; At least the tubes help keep the house warm - and with the current price of heating oil, that's useful.............plus they cost NOTHING! My dad bought that 6L6 in 1936, and I want his money's worth; /archives//html/Amps/2000-10/msg00162.html (8,702 bytes)

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