Mail Archive Search: <+from:w8jitom@postoffice.worldnet.att.net>

Results:

References: [ +from:w8jitom@postoffice.worldnet.att.net: 313 ]

Total 313 documents matching your query.

201. [AMPS] re:4-250A (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Tue, 29 Jul 1997 09:38:04 +0000; To: <amps@contesting.com> I've heard Rich make this incorrect statement several times. You are correct Tony. SK Carl, W8LAD was cited on 160 for having a signal ten KHz wide when he was on 1828 KHz.; /archives//html/Amps/1997-07/msg00274.html (9,889 bytes)
202. [AMPS] Re: TopBand: 160m shunt feeds (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Tue, 29 Jul 1997 23:27:07 +0000; To: <amps@contesting.com> Hi Carl, While a larger conductor would have less loss, the loss is so low to begin with you could never notice the change. Loss is only due to resistive losses, reactances; /archives//html/Amps/1997-07/msg00291.html (9,396 bytes)
203. [AMPS] Tetrode Amp articles needed (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Wed, 4 Jun 1997 22:13:58 +0000; That's not necessarily correct data. Exciter's power capabilities as well as the PA's grid circuit efficiency varies from band to band, plus someone is likely to eventually connect a different radio; /archives//html/Amps/1997-06/msg00011.html (10,379 bytes)
204. [AMPS] Tetrode Amp articles needed (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Thu, 5 Jun 1997 14:03:11 +0000; Hi Ian, Absolutely correct. If the PA was built like an AB2 PA, even though operated AB1, problems would be greatly reduced. Unfortunately MANY published designs use a high value grid source resistan; /archives//html/Amps/1997-06/msg00021.html (11,965 bytes)
205. [AMPS] Which Amp? (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Thu, 5 Jun 1997 14:03:12 +0000; Hi Ed, Like the K2AW deal and others, OVERsight might be a more accurate term. That is a good suggestion. Vacuum relays would be nice. Rich somehow has made up his mind a grounded grid PA can not be; /archives//html/Amps/1997-06/msg00022.html (8,268 bytes)
206. [AMPS] Question on bias switching (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Thu, 5 Jun 1997 14:03:12 +0000; Hi Bill, circuit to No, it does almost nothing. It makes only the slightest change is quiescent current and open circuit relay voltage. There was even a rumor going around (it was on an amplifier Web; /archives//html/Amps/1997-06/msg00023.html (7,968 bytes)
207. [AMPS] Tetrode Amp articles needed (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Thu, 5 Jun 1997 15:34:13 +0000; Hi Terry, I would too, if it worked properly. Unfortunately, those controls more often than not allow the exciter to overshoot on leading edges. I've measured ICOMs that produce 300 watts PEP when se; /archives//html/Amps/1997-06/msg00026.html (9,574 bytes)
208. [AMPS] Fault in 8877 amp (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Fri, 6 Jun 1997 07:33:15 +0000; Hi Steve, Although it sure sounds like a tube arcing (no one can be sure without being there, hi) I'd like to suggest some other things to consider. If the failure happens only on one band, it might; /archives//html/Amps/1997-06/msg00043.html (9,052 bytes)
209. [AMPS] 3-600z on the way (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Fri, 6 Jun 1997 08:57:03 +0000; There are a few incorrect statements here..... Being involved with Heath, and reviewing the design of the 220, I can assure you the air supply of the SB-220 is not "over-supply". The SB-220 was desig; /archives//html/Amps/1997-06/msg00045.html (10,311 bytes)
210. [AMPS] Tetrode Amp articles needed (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Fri, 6 Jun 1997 08:57:03 +0000; That's a good suggestion Jerry. In tests here, that has corrected the problem. Thank's for mentioning it. 73, Tom W8JI -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesti; /archives//html/Amps/1997-06/msg00046.html (8,860 bytes)
211. [AMPS] Which Amp? (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Fri, 6 Jun 1997 08:57:03 +0000; Hi Rich, I don't intend to get in a vile nasty name calling session with you. But you should, since you want to be helpful, try to be more careful to research what you claim instead of making immatur; /archives//html/Amps/1997-06/msg00047.html (8,397 bytes)
212. [AMPS] Tetrode Amp articles needed (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Fri, 6 Jun 1997 08:57:03 +0000; If you read my post again, you'll see I said an ALC system with a SLOW decay will help this problem. You might get one occasional leading edge overshoot, but the overshoots caused by brief pauses wi; /archives//html/Amps/1997-06/msg00048.html (10,476 bytes)
213. [AMPS] PA Recommendation Wanted (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Sat, 7 Jun 1997 00:14:17 +0000; Right. By the time you see it on a meter, your signal is often a mess. A peak detector with a hold circuit (perhaps driving an LED) would be a good idea. I also like Ian's suggestion of building the; /archives//html/Amps/1997-06/msg00077.html (10,015 bytes)
214. [AMPS] 3-600z on the way (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Sat, 7 Jun 1997 00:14:17 +0000; Heat energy is the same in steady operation. The graphite is slower to heat, but gets just as hot. The Graphite retains the heat and very slowly releases it thru That is exactly correct. The graphite; /archives//html/Amps/1997-06/msg00078.html (8,600 bytes)
215. [AMPS] Airflow (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Sat, 7 Jun 1997 09:06:32 +0000; That's correct Carl. It takes more airflow to maintain the same seal temperatures because much of the airflow is wasted. Most of the air misses the tubes. The problem is exactly like a car going thr; /archives//html/Amps/1997-06/msg00085.html (10,314 bytes)
216. [AMPS] Splatter (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Sat, 7 Jun 1997 09:06:32 +0000; While there is no dB figure given, the rules plainly state by-products from modulation should be held to state of the art levels. It is also illegal to cause interference or have modulation products; /archives//html/Amps/1997-06/msg00086.html (9,738 bytes)
217. [AMPS] PA Recommendation Wanted (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Mon, 9 Jun 1997 00:21:43 +0000; That's correct Ian. That's why Eimac strongly disagreed with suggestions to use "grid fuses" unless they are accompanied with proper shunt resistances. Eimac usually give a grid and screen voltage t; /archives//html/Amps/1997-06/msg00114.html (12,139 bytes)
218. [AMPS] Splatter (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Mon, 9 Jun 1997 00:21:43 +0000; Hi Ian, Grid dissipation is not bias voltage times grid current. It is the value of POSITIVE grid voltage (with respect to the cathode) times grid current integrated over the conducting portion of th; /archives//html/Amps/1997-06/msg00115.html (11,169 bytes)
219. [AMPS] Temp-Lac (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Mon, 9 Jun 1997 00:21:44 +0000; Tempil Industries in Plainfield, NJ (908) 757-8300 73, Tom W8JI -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting; /archives//html/Amps/1997-06/msg00116.html (6,961 bytes)
220. [AMPS] Splatter and ALC (score: 1): Author: w8jitom@postoffice.worldnet.att.net (w8jitom@postoffice.worldnet.att.net); Date: Mon, 9 Jun 1997 00:38:41 +0000; To: <amps@contesting.com> Audio reports have NOTHING to do with excessive IMD. IMD is by definition mostly OUT of signal band products, so the other guy's receiver (when tuned to YOUR frequency) doe; /archives//html/Amps/1997-06/msg00117.html (9,147 bytes)

Current List: 201 - 220
Page: [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16]