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141. [Amps] Swan Mark 1 Plate current fixed!! (score: 1): Author: Bill Smith <ko4nrbs@yahoo.com>; Date: Tue, 23 Dec 2003 13:30:55 -0800 (PST); The 1K ohm 1% resistor in the voltage divider had dropped to less than 450ohms for some reason. Replaced it and now all is well. The resting plate voltage as measured with a Fluke HV probe is 2950vdc; /archives//html/Amps/2003-12/msg00359.html (6,790 bytes)
142. [Amps] Cera-Mite Doorknob Capacitor (score: 1): Author: Bill Smith <ko4nrbs@yahoo.com>; Date: Thu, 15 Jan 2004 06:28:17 -0800 (PST); Anyone got the specifications for the Cera-Mite 715G doorknob capacitor? I was wondering if they would be suitable as plate blocking capacitors in my Swan mark 1 amplifier(2500vdc key down/2900vdc re; /archives//html/Amps/2004-01/msg00156.html (7,051 bytes)
143. [Amps] ARRL Handbook Article Needed (score: 1): Author: Bill Smith <ko4nrbs@yahoo.com>; Date: Wed, 11 Feb 2004 05:40:34 -0800 (PST); Does anyone have a copy of this article? I want to build the Tow Tone Generator described in it using a FAR Circuits PC board. ARRL HB CHP25 FIG.51 (88-91) AND CHP25 FIG.39(>93) 73, Bill == Bill Smit; /archives//html/Amps/2004-02/msg00081.html (6,514 bytes)
144. [Amps] Hi Pot tester at auction in York, PA (score: 1): Author: Bill Smith <ko4nrbs@yahoo.com>; Date: Wed, 11 Feb 2004 13:05:31 -0800 (PST); http://www.auctionmart.com/scripts/osa/OsAuction.dll?OsaScript=ViewPage&templateName=item_form.htx&itemNumber=508536 73, Bill == Bill Smith KO4NR __________________________________ Do you Yahoo!? Yah; /archives//html/Amps/2004-02/msg00084.html (7,089 bytes)
145. [Amps] Check out this military auction for EIMAC 4CX250B tubes (score: 1): Author: Bill Smith <ko4nrbs@yahoo.com>; Date: Thu, 12 Feb 2004 17:32:35 -0800 (PST); http://web.govliquidation.com/auction/view?id=327127 18 of them sold for $800.00. and here 9 sold for $135.00 http://web.govliquidation.com/auction/view?id=327128 All were in the same condition (A4).; /archives//html/Amps/2004-02/msg00093.html (6,815 bytes)
146. [Amps] 6LQ6 Input Impedance (score: 1): Author: Bill Smith <ko4nrbs@yahoo.com>; Date: Sun, 15 Feb 2004 06:56:29 -0800 (PST); What is the input impedance of the 6LQ6? 73, Bill == Bill Smith KO4NR __________________________________ Do you Yahoo!? Yahoo! Finance: Get your refund fast by filing online. http://taxes.yahoo.com/f; /archives//html/Amps/2004-02/msg00118.html (6,727 bytes)
147. [Amps] Interesting 4CX800A/GU-74B Russian Project (score: 1): Author: Bill Smith <ko4nrbs@yahoo.com>; Date: Fri, 30 Apr 2004 05:06:29 -0700 (PDT); http://www.cqham.ru/ut2fw/amplifiers/amp_74-1_eng.htm 73, Bill == Bill Smith KO4NR __________________________________ Do you Yahoo!? Win a $20,000 Career Makeover at Yahoo! HotJobs http://hotjobs.swe; /archives//html/Amps/2004-05/msg00002.html (7,023 bytes)
148. [Amps] Heathkit HA-10 Warrior (score: 1): Author: Bill Smith <ko4nrbs@yahoo.com>; Date: Fri, 22 Jul 2005 06:55:21 -0700 (PDT); My old Warrior has developed a strange problem. The plate voltage is low, around 900vdc but sometimes slowly creeps up to 1200vdc. I checked the plate transformer and swinging choke(disconneted), and; /archives//html/Amps/2005-07/msg00255.html (7,074 bytes)
149. [Amps] Transformer core shorted to secondary winding?? (score: 1): Author: Bill Smith <ko4nrbs@yahoo.com>; Date: Sat, 23 Jul 2005 17:54:02 -0700 (PDT); Transformer is a 3400vac CT All Secondary leads lifted and using a HV Probe (Fluke 80K-40) CT to chassis- 843 volts One side of secondary to chassis- 2450 Other side of secondary to chassis- 863 No c; /archives//html/Amps/2005-07/msg00286.html (6,760 bytes)
150. Re: [Amps] Transformer core shorted to secondary winding?? (score: 1): Author: Bill Smith <ko4nrbs@yahoo.com>; Date: Sun, 24 Jul 2005 04:33:30 -0700 (PDT); Grounded the CT as it was before at the swinging choke. The voltage at both ends of the secondary to the CT is a little of 1700vac. This is an old Heathkit HA-10 Warrior. The orginial problem was tha; /archives//html/Amps/2005-07/msg00292.html (11,874 bytes)
151. Re: [Amps] Transformer core shorted to secondary winding?? (score: 1): Author: Bill Smith <ko4nrbs@yahoo.com>; Date: Sun, 24 Jul 2005 06:25:02 -0700 (PDT); Unplugged diodes one at a time as suggested. Measured 1300vdc with one unplugged and zero volts with it plugged back in and the other one unplugged. The bleeder resisotr is too hot to lay your finger; /archives//html/Amps/2005-07/msg00298.html (12,411 bytes)
152. [Amps] SB-220 Submerged (score: 1): Author: Bill Smith <ko4nrbs@yahoo.com>; Date: Wed, 3 Aug 2005 12:45:53 -0700 (PDT); Other than the obvious "dry it out" what should a guy do to get a SB-220 back on after having been submerged in a basement for over a week? A friend of mine was away when a very bad storm flooded his; /archives//html/Amps/2005-08/msg00059.html (6,873 bytes)
153. [Amps] 813 Amplifier Article (score: 1): Author: Bill Smith <ko4nrbs@yahoo.com>; Date: Wed, 30 Mar 2011 16:22:55 -0700 (PDT); Is this design still ok for the 813. It was written long ago I think. http://jlandrigan.com/files/813%20Grounded%20Grid%20Amplifier/GE%20Ham%20News%20813%20GG%20article.pdf I have a bunch of these tu; /archives//html/Amps/2011-03/msg00275.html (7,275 bytes)
154. [Amps] Swan Mark 1 3-400Z Tuned Input (score: 1): Author: Bill Smith <ko4nrbs@yahoo.com>; Date: Wed, 30 Mar 2011 17:23:15 -0700 (PDT); I am trying to come up with the initial component values for a Tuned Input. The Swan Mark 1 uses two 3-400Z tubes. The input impedance according to a chart I found is 115 ohms for one tube. I am usin; /archives//html/Amps/2011-03/msg00280.html (7,139 bytes)
155. [Amps] PI Calculation using G3SEK Excel Spreadsheet (score: 1): Author: Bill Smith <ko4nrbs@yahoo.com>; Date: Thu, 31 Mar 2011 17:25:42 -0700 (PDT); Are these values correct (in ??) for two 3-400Z tubes at 2500vdc and 800ma Plate Current? There is so much information there I get lost. Input Supply voltage E 2500 V Input Max DC anode current Ia 0.; /archives//html/Amps/2011-03/msg00314.html (8,263 bytes)
156. [Amps] GU-84B Conversion (score: 1): Author: Bill Smith <ko4nrbs@yahoo.com>; Date: Tue, 12 Apr 2011 17:47:25 -0700 (PDT); I'm considering converting my old Swan Mark 1 (two 3-400Z tubes) to use one GU-84B. Some time ago I replaced the panel bandswitch in the Swan with a Radio Switch Model 86 six position switch with two; /archives//html/Amps/2011-04/msg00340.html (7,316 bytes)
157. [Amps] GU-84B Conversion (Re-thought) (score: 1): Author: Bill Smith <ko4nrbs@yahoo.com>; Date: Wed, 13 Apr 2011 15:23:17 -0700 (PDT); Well thanks to all of you here I have abandoned the idea of using the GU-84B. Staying with a Triode is the way to go. As it sets the amp needs a Tuned Input and a tank circuit refinement if I staye; /archives//html/Amps/2011-04/msg00385.html (10,906 bytes)
158. [Amps] GI-46B it is!! (score: 1): Author: Bill Smith <ko4nrbs@yahoo.com>; Date: Thu, 14 Apr 2011 15:34:04 -0700 (PDT); I'll use the GI-46B as the tube replacement in the Swan Mark 1. They are short enough and are inexpensive. I have been wanting to experiment some with the ceramic tubes anyway. My current power suppl; /archives//html/Amps/2011-04/msg00433.html (7,294 bytes)
159. [Amps] Roller Inductor Choices (score: 1): Author: Bill Smith <ko4nrbs@yahoo.com>; Date: Thu, 14 Apr 2011 16:56:22 -0700 (PDT); I plan on using a roller inductor with two GI-46B tubes in the old Swan Mark 1. Is the edge wound the one I should use? How many amps should it be rated for? 73, Bill Smith KO4NR ____________________; /archives//html/Amps/2011-04/msg00434.html (6,303 bytes)
160. Re: [Amps] GU84B tube (score: 1): Author: Bill Smith <ko4nrbs@yahoo.com>; Date: Sun, 17 Apr 2011 05:21:24 -0700 (PDT); There are some examples here: http://qro-shop.com/Link.htm Bill Smith KO4NR _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/l; /archives//html/Amps/2011-04/msg00468.html (8,387 bytes)

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