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161. [AMPS] Re: transformers (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Thu, 10 Jul 1997 18:12:30 +0000; To: <amps@contesting.com> I take your response as indicating the filament circuits are indeed different. The TL-922 places the filaments in series, much as the filament surge prone All American Five; /archives//html/Amps/1997-07/msg00062.html (11,622 bytes)
162. [AMPS] Re: Arcs (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Fri, 11 Jul 1997 09:48:10 +0000; Not a funny thing at all, common sense. In the publication "Getters and their Function in Vacuum Tube Manufacture", arcs are listed in methods of gettering a tube. Also, not all arcs are gas. Some a; /archives//html/Amps/1997-07/msg00063.html (9,379 bytes)
163. [AMPS] Re: Bent filaments (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Sun, 13 Jul 1997 11:55:20 +0000; To: <amps@contesting.com> I wonder how the VHF current gets so high through VERY large RF choke so as to melt the wire, when full boogie HF drive doesn't melt the wire? This claim seems to be a case; /archives//html/Amps/1997-07/msg00071.html (12,542 bytes)
164. [AMPS] Re: TL-922 transformers (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Sun, 13 Jul 1997 20:12:16 +0000; To: <amps@contesting.com> That is ONLY true if the resistance of the entire path to the center tap is MANY times less than the cold resistance of the tube's filaments. Since the TL-922 does not meet; /archives//html/Amps/1997-07/msg00074.html (9,171 bytes)
165. [AMPS] Re: Bent filaments (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Sun, 13 Jul 1997 21:26:07 +0000; To: <amps@contesting.com> Rich, You now claim the VHF current is dc. But in another post you claimed RF heats the grid of an 8877 and boils away the gold, and you claim HUNDREDS of mA of dc can't hu; /archives//html/Amps/1997-07/msg00075.html (10,206 bytes)
166. [AMPS] 30L-1 (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Mon, 14 Jul 1997 11:27:35 +0000; To: <amps@contesting.com> Hi Dale, I've never heard of a heat problem with the 30L1, it's only a 260 watt dissipation set of tubes. Frying eggs on the outside is a subjective statement anyway, what; /archives//html/Amps/1997-07/msg00084.html (9,132 bytes)
167. [AMPS] Re: Bent filaments (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Mon, 14 Jul 1997 11:27:36 +0000; To: <amps@contesting.com> Hi Phil, Thanks for adding some intelligent comments to this subject. I agree totally. The filter capacitor is the source of the energy. Only a resistance is fast enough, a; /archives//html/Amps/1997-07/msg00085.html (11,514 bytes)
168. [AMPS] Technobabble (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Mon, 14 Jul 1997 13:12:20 +0000; To: <amps@contesting.com> Hi Carl, Is it possible limited tools and technical skills makes good science sound like technobabble? I would guess any person thinking bat wings and dead chickens are mod; /archives//html/Amps/1997-07/msg00087.html (7,950 bytes)
169. [AMPS] Re: Bent filaments (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Mon, 14 Jul 1997 13:12:20 +0000; To: <amps@contesting.com> No sale Carl. When the tube faults the grid flys right up to full anode voltage. The grid just as often as not arcs to the filament in that condition, wiping out all the st; /archives//html/Amps/1997-07/msg00088.html (11,800 bytes)
170. [AMPS] Re: Bent filaments (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Mon, 14 Jul 1997 19:40:13 +0000; To: <amps@contesting.com> Hi Bob, Absolutely. The best electrolytics are ones that are just as large as necessary. Overkill in the power supply transformer and rectifiers is a good idea, but one the; /archives//html/Amps/1997-07/msg00095.html (9,878 bytes)
171. [AMPS] Grid capacitors (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Tue, 15 Jul 1997 13:29:48 +0000; To: <amps@contesting.com> Rich then posted: Rich, why is it when someone disagrees with your "theories", you always imply they are unworthy or have personal motives? Riding around with 3-500Z's in a; /archives//html/Amps/1997-07/msg00100.html (9,757 bytes)
172. [AMPS] Re: Bent filaments (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Tue, 15 Jul 1997 13:29:48 +0000; To: <amps@contesting.com> Rich replied: Sorry Rich, I only know English and it doesn't seem to work. I;'ll try one last time. 1.) In "Getters And Their Function in Vacuum Tubes", an arc is listed as; /archives//html/Amps/1997-07/msg00101.html (9,720 bytes)
173. [AMPS] Hello from a new member (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Tue, 15 Jul 1997 18:46:36 +0000; To: <amps@contesting.com> Welcome to the warm friendly group. ;-) Neat. Oh oh, I wouldn't put a fuse in the B minus line. Safety resistors are also not good, unless augmented by diodes. If the resis; /archives//html/Amps/1997-07/msg00103.html (9,852 bytes)
174. [AMPS] SB220 Diodes (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Wed, 16 Jul 1997 14:25:20 +0000; To: <amps@contesting.com> Hi John, I think you already got an answer of what the diodes were, but I'd suggest using 1N5408's as repalcements. They are cheap and VERY rugged, and that makes them a go; /archives//html/Amps/1997-07/msg00111.html (7,679 bytes)
175. [AMPS] Run a pair of 4-1000's? (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Thu, 17 Jul 1997 20:34:35 +0000; To: <amps@contesting.com> Hi Lane, You can get 4 K out of a pair, but unless you have a BIG exciter you'll need to grid drive the tubes. 4-1000A's get a little unstable at 5000 volts and above, espe; /archives//html/Amps/1997-07/msg00115.html (7,746 bytes)
176. [AMPS] re:4-250A (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Fri, 18 Jul 1997 14:28:48 +0000; To: <amps@contesting.com> Add me to that body. During many IMD tests (I make one IMD test per week on an average work week) I've found IMD performance can improve, stay the same, or get worse with a; /archives//html/Amps/1997-07/msg00134.html (8,840 bytes)
177. [AMPS] 4-1000 (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Fri, 18 Jul 1997 14:28:48 +0000; To: <amps@contesting.com> Another case of improperly reading the text Peter. Here's what the text says on page 8 of my brand new Jennings catalog: "RF working voltage is the maximum peak RF voltage; /archives//html/Amps/1997-07/msg00135.html (8,799 bytes)
178. [AMPS] 3CX2500 (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Mon, 21 Jul 1997 08:50:01 +0000; To: <amps@contesting.com> I know of a local ham operator using two 3CX2500F3's in parallel grounded grid, and he obtains over 10,000 watts PEP output with the tubes (I've been there and seen him pin; /archives//html/Amps/1997-07/msg00145.html (9,322 bytes)
179. [AMPS] 3cx3000 Eimac (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Tue, 22 Jul 1997 01:30:38 +0000; To: <amps@contesting.com> The Henry used the A7 which is a VERY clean tube for SSB service, despite the fact the tube draws grid current ;-). The dissipation is 4 kW, with enough air flow. I'd get a; /archives//html/Amps/1997-07/msg00156.html (10,013 bytes)
180. [AMPS] re:4-250A (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Tue, 22 Jul 1997 01:30:38 +0000; To: <amps@contesting.com> No, that is not true. The line can curve without IMD. The slope of the curve affects the level and amplitude of various IMD products, and if the curve is sloped correctly n; /archives//html/Amps/1997-07/msg00157.html (10,827 bytes)

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