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1. [Amps] Nichrome Parasitic Suppressor (score: 1): Author: bearlabs@netzero.net (BEAR); Date: Thu, 02 Jan 2003 13:29:09 -0500; Anyone have a clear jpeg of a typical installation of Rich's nichrome/SS parasitic surpressor construction? _-_-bear -- _-_-bearlabs http://www.bearlabsUSA.com - Silver Lightning Interconnects & Cust; /archives//html/Amps/2003-01/msg00009.html (6,340 bytes)
2. [Amps] Re: Thunderbolt (score: 1): Author: bearlabs@netzero.net (BEAR); Date: Sat, 11 Jan 2003 12:21:46 -0500; Around here Bill, KC2IFR (iirc) just put one on the air - AM, 75m. One of the things he found was that the input is a 350 ohm resistor... which makes matching to solid state trancievers a bit dodgy..; /archives//html/Amps/2003-01/msg00081.html (7,510 bytes)
3. [Amps] Re: Chassis cleaning (score: 1): Author: bearlabs@netzero.net (BEAR); Date: Tue, 14 Jan 2003 12:50:08 -0500; With the Alodine coating, you may not have that much problem cleaning it up... Seems like something has eaten through the Alodine, which is relatively soft and thing compared to anodize... I'd opt fo; /archives//html/Amps/2003-01/msg00113.html (8,257 bytes)
4. [Amps] Re: AB1 v. AB2 (score: 1): Author: bearlabs@netzero.net (BEAR); Date: Sun, 01 Dec 2002 15:20:47 -0500; The grid current that flows is so insignificant that no appreciable current *can* flow, so the tube does not reach beyond AB1 in practical terms. In practice the output signal is merely clipped when; /archives//html/Amps/2002-12/msg00010.html (9,304 bytes)
5. [Amps] Q: Chimneys for 3-500/4-400?? (score: 1): Author: bearlabs@netzero.net (BEAR); Date: Tue, 03 Dec 2002 12:27:31 -0500; Wondering if anyone can suggest an inexpensive source for chimneys for the 3-400/4-400 type tubes? Especially cheap imports. :- ) Or if anyone in the US has a pair they want to blow out... Or if anyo; /archives//html/Amps/2002-12/msg00040.html (7,797 bytes)
6. [Amps] Q: Chimneys for 3-500/4-400?? (score: 1): Author: bearlabs@netzero.net (BEAR); Date: Tue, 03 Dec 2002 13:49:07 -0500; Nah nah... no thanks... I think the issue is the temperature of the plate seal and the pins seals... I'd also prefer to have the same temp air on all sides of the tube. You should read the descriptio; /archives//html/Amps/2002-12/msg00043.html (9,753 bytes)
7. [Amps] Q: Chimneys for 3-500/4-400?? (score: 1): Author: bearlabs@netzero.net (BEAR); Date: Tue, 03 Dec 2002 16:39:27 -0500; Depends upon the anode radiator design! And the actual airflow and air temp before the air reaches the radiator/cap. Right - I'm using a much quieter blower... the old one is long gone anyhow. You ha; /archives//html/Amps/2002-12/msg00050.html (12,830 bytes)
8. [Amps] Q: PIN Diode Switching for QRO? (score: 1): Author: bearlabs@netzero.net (BEAR); Date: Sat, 07 Dec 2002 14:10:34 -0500; Ok, I've known about PIN diode switching for a long time now, but have failed to actually read anything subtantive on the application or find any schematics that show examples. Admittedly, I no longe; /archives//html/Amps/2002-12/msg00132.html (7,069 bytes)
9. [Amps] HENRY 2k-3 Saga! (score: 1): Author: bearlabs@netzero.net (BEAR); Date: Sat, 07 Dec 2002 19:57:07 -0500; Anyhow, here's the *saga* up to today! http://www.bearlabs.com/ARCH/HENRYWEB/HENRY.html _-_-bear -- _-_-bearlabs http://www.bearlabsUSA.com - Silver Lightning Interconnects & Custom Mods -; /archives//html/Amps/2002-12/msg00134.html (6,312 bytes)
10. [Amps] Amp Saga continues! Page 4 up (score: 1): Author: bearlabs@netzero.net (BEAR); Date: Wed, 11 Dec 2002 21:38:17 -0500; Hi QROers, The saga of the Henry 2k-3 continues... with homebrew chimneys! http://www.bearlabs.com/ARCH/HENRYWEB/HENRY4.html it starts here in case you missed it: http://www.bearlabs.com/ARCH/HENRYWE; /archives//html/Amps/2002-12/msg00166.html (6,678 bytes)
11. [Amps] Perf Metal (score: 1): Author: bearlabs@netzero.net (BEAR); Date: Sat, 14 Dec 2002 14:30:59 -0500; The best way to get perf metal locally is to look for sheet metal supplier (wholesale) and sheet metal fabrication shops in your area. The latter are the guys with CNC machines that make up stuff com; /archives//html/Amps/2002-12/msg00192.html (7,253 bytes)
12. [Amps] Re:440S current (score: 1): Author: bearlabs@netzero.net (BEAR); Date: Sat, 21 Dec 2002 13:32:22 -0500; Interesting... Has anyone put the 440S on a spectrum analyzer and determined what the difference is in distortion products with either increased driver current, increased output current or both? And; /archives//html/Amps/2002-12/msg00233.html (6,595 bytes)
13. [Amps] English grammer plays a role... (score: 1): Author: bearlabs@netzero.net (BEAR); Date: Wed, 25 Dec 2002 12:50:27 -0500; If it was written like this: "... the Ten-Tec "MORON"... Then the meaning is clear - the term *moron* is referring to the radio not the poster. The use of the word *the* added to the phrase makes the; /archives//html/Amps/2002-12/msg00289.html (7,083 bytes)
14. [Amps] Re: AB1 v. AB2 (score: 1): Author: bearlabs@netzero.net (BEAR); Date: Fri, 29 Nov 2002 12:24:35 -0500; To: <amps@contesting.com> I dunno about that one... check a handbook. This is because in effect the load line is "longer" in AB2 than AB1. AB2 permits you to draw grid current, whereas AB1 does not.; /archives//html/Amps/2002-11/msg00398.html (9,710 bytes)
15. [Amps] Re: AB1 v. AB2 (score: 1): Author: bearlabs@netzero.net (BEAR); Date: Sat, 30 Nov 2002 14:05:43 -0500; To: <amps@contesting.com> it can't. If it can then it is an AB2 amp. _-_-bear WB2GCR -- _-_-bearlabs http://www.bearlabsUSA.com - Silver Lightning Interconnects & Custom Mods -; /archives//html/Amps/2002-11/msg00420.html (12,110 bytes)
16. [Amps] Re: AB1 v. AB2 (score: 1): Author: bearlabs@netzero.net (BEAR); Date: Sat, 30 Nov 2002 18:11:47 -0500; To: <amps@contesting.com> At least at audio frequencies that is done by AC coupling to the grids... At RF I'm not sure at the moment - but by definition the difference is grid current vs. no grid cur; /archives//html/Amps/2002-11/msg00424.html (13,896 bytes)
17. [Amps] FS: 4-400 pulls (7 pcs) (score: 1): Author: bearlabs@netzero.net; Date: Sat, 8 May 2004 14:22:52 GMT; I've got some 4-400s that are doing me no good for sale, if no one scoffs these up, next stop is ebay... These were purchased from a Central NY broadcast station chief eng too many years back, he ass; /archives//html/Amps/2004-05/msg00089.html (7,788 bytes)
18. [Amps] Frying tubes... some questions (score: 1): Author: "bearlabs@netzero.net" <bearlabs@netzero.net>; Date: Wed, 26 May 2004 00:54:11 GMT; Some questions that I don't really know the answers to, although I suppose I should... Q1: 4-400 No fil voltage applied, B+ applied, screen grounded, grid open, floating. Tube fries?? Q2: ...same sce; /archives//html/Amps/2004-05/msg00232.html (7,587 bytes)
19. [Amps] Re: 4-400 Question - It's Grounded Grid! (score: 1): Author: "bearlabs@netzero.net" <bearlabs@netzero.net>; Date: Thu, 27 May 2004 22:48:00 GMT; Message: 8 Date: Wed, 26 May 2004 15:27:43 -0400 From: Will Matney <craxd1@ezwv.com> Subject: [Amps] Bear, 4-400 question To: "amps@contesting.com" <amps@contesting.com> Message-ID: <40B4EFAF.1090809; /archives//html/Amps/2004-05/msg00251.html (8,687 bytes)
20. [Amps] EIMAC 3-400 vs. 3-500 how to ID?? (score: 1): Author: "bearlabs@netzero.net" <bearlabs@netzero.net>; Date: Thu, 1 Jul 2004 22:54:54 GMT; Due to lack of personal experience over the years with these tubes I don't know the answer, do you? - Is there a reliable way to ID an EIMAC 3-400 vs. a 3-500 beyond reading the silkscreened info? As; /archives//html/Amps/2004-07/msg00007.html (6,866 bytes)

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