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Total 218 documents matching your query.

161. [Amps] YC-156 Duds (score: 1)
Author: "k7rdx" <k7rdx@charter.net>
Date: Sat, 13 Dec 2008 07:38:37 -0800
The YC-156 Duds have been spoken for..Tnx for the interest everyone who inquired..Jim..K7RDX.. _______________________________________________ Amps mailing list Amps@contesting.com http://lists.conte
/archives//html/Amps/2008-12/msg00209.html (6,187 bytes)

162. Re: [Amps] Source for YC-156 tubes (score: 1)
Author: "k7rdx" <k7rdx@charter.net>
Date: Wed, 28 Jan 2009 07:38:36 -0800
I have purchased several YC-156A pulls from this vendor and nearly every one tested very good. They will exchange if you get a bad tube,however I suggest if building from scratch to have your tubes t
/archives//html/Amps/2009-01/msg00329.html (8,279 bytes)

163. Re: [Amps] De-gassing/de-barnacling YC-156 tubes (was Source for YC-156tubes) (score: 1)
Author: "k7rdx" <k7rdx@charter.net>
Date: Wed, 28 Jan 2009 18:06:48 -0800
Dave,I do agree with most of your dissertation however,I do find running the heater and re-hi-potting to be beneficial to tube de-gassing...I am telling you this from practical experiance with buildi
/archives//html/Amps/2009-01/msg00334.html (12,156 bytes)

164. Re: [Amps] SB-220's, 3-500's, some history (score: 1)
Author: "k7rdx" <k7rdx@charter.net>
Date: Fri, 6 Feb 2009 07:43:41 -0800
Bless you for all this info Lou,and may your 3-500Z cup runneth over and your love of Heath 220`s never cease..73,Jim..K7RDX.. -- Original Message -- From: <Gudguyham@aol.com> To: <amps@contesting.co
/archives//html/Amps/2009-02/msg00150.html (13,283 bytes)

165. Re: [Amps] High voltage/wattage zeners (score: 1)
Author: "k7rdx" <k7rdx@charter.net>
Date: Sun, 8 Feb 2009 08:14:20 -0800
K2AW,Mouser,RFParts Co,all sell 50 watt stud mount Zeners of various voltages...K2AW has best prices and faster service IMO..I have purchased 50 watt zeners from all mentioned suppliers..GL,Jim..K7RD
/archives//html/Amps/2009-02/msg00203.html (9,580 bytes)

166. Re: [Amps] Autotuners in Amps (score: 1)
Author: "k7rdx" <k7rdx@charter.net>
Date: Wed, 11 Feb 2009 20:46:13 -0800
I have used the LDG board in my 3CPX5000A7/YC-156A amplifier since 2006 with excellent results:www.k7rdx.w4zt.com. The tuner is an L network so adding c at the cathode is a good idea for better harmo
/archives//html/Amps/2009-02/msg00348.html (8,730 bytes)

167. Re: [Amps] Autotuners in Amps (score: 1)
Author: "k7rdx" <k7rdx@charter.net>
Date: Thu, 12 Feb 2009 12:44:17 -0800
I`m sure nearly if not all competant builders figured this out long ago...73..Jim..K7RDX.. -- Original Message -- From: "Wayne Rogers" <n1wr@chesapeake.net> To: <Amps@contesting.com> Sent: Thursday,
/archives//html/Amps/2009-02/msg00377.html (8,842 bytes)

168. Re: [Amps] Tony King's websites (score: 1)
Author: "k7rdx" <k7rdx@charter.net>
Date: Fri, 13 Feb 2009 23:17:02 -0800
Tony was a real honest type of guy and had no use for people who scam or cheat others..If you look at his web site,there are many interesting ways he shows his values in life...He had an interest in
/archives//html/Amps/2009-02/msg00440.html (9,826 bytes)

169. Re: [Amps] Question for All Amp Builders... (score: 1)
Author: "k7rdx" <k7rdx@charter.net>
Date: Fri, 20 Feb 2009 13:27:48 -0800
Bill Orr handbook,hard bound 22nd Edition,excellent condition,30.00 shipped Cont USA,Several vintage ARRL Handbooks,inquire...If anyone is interested pse contact me off list,Jim..K7RDX.. -- Original
/archives//html/Amps/2009-02/msg00599.html (11,106 bytes)

170. Re: [Amps] Transformer Update (score: 1)
Author: "k7rdx" <k7rdx@charter.net>
Date: Sat, 28 Feb 2009 09:31:13 -0800
I encourage the QRO guys in the Southern parts of the USA to use as much power as their hearts desire...We produce here (Central Wa) much of the excess megawatts purchased by them for several times w
/archives//html/Amps/2009-02/msg00714.html (10,678 bytes)

171. Re: [Amps] DEAD Alpha 91B (score: 1)
Author: "k7rdx" <k7rdx@charter.net>
Date: Thu, 5 Mar 2009 10:43:12 -0800
-- _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2009-03/msg00153.html (12,894 bytes)

172. Re: [Amps] Can someone ID this tube and its use ? (score: 1)
Author: "k7rdx" <k7rdx@charter.net>
Date: Wed, 1 Apr 2009 19:36:24 -0700
Several years ago I bought a few surplus Y-448 tubes made by National. They were close to my standard 4-1000A`s in performance at HF,however,the filaments drew around 30 amps (per tube) as compared t
/archives//html/Amps/2009-04/msg00025.html (8,656 bytes)

173. [Amps] Looking for vacuum cap.. (score: 1)
Author: "k7rdx" <k7rdx@charter.net>
Date: Thu, 7 May 2009 13:56:06 -0700
Greetings Gents...I`m looking for a fixed vacuum cap like 200 or 250pf rated 10-15kv.If anyone has such and it`s surplus to them please contact me off list..Many thanks..Jim..K7RDX.. ________________
/archives//html/Amps/2009-05/msg00032.html (6,358 bytes)

174. Re: [Amps] Mla2500 (score: 1)
Author: "k7rdx" <k7rdx@charter.net>
Date: Tue, 19 May 2009 20:32:50 -0700
The Russian tubes need to be hipot tested,especially the spares because they are probably gassy from long term storage.If they flash over just one time they are most likely reduced to junk...Too bad
/archives//html/Amps/2009-05/msg00131.html (7,626 bytes)

175. [Amps] PWD 3amp/95uH plate choke/YC-156A on 160 meters (score: 1)
Author: "k7rdx" <k7rdx@charter.net>
Date: Wed, 20 May 2009 16:27:42 -0700
Would like some comments from YC-156A builders who may have tried the PWD 3 amp 95uH plate choke on 160 meters.Works well for me 20-80 but a bit squirly so far on 160...Not enough I? I understand a f
/archives//html/Amps/2009-05/msg00141.html (6,669 bytes)

176. Re: [Amps] PWD 3amp/95uH plate choke/YC-156A on 160 meters (score: 1)
Author: "k7rdx" <k7rdx@charter.net>
Date: Wed, 20 May 2009 19:04:17 -0700
Hi Phil,thanks for the suggestion re the rfparts choke..Your`e right abt the interaction with the tank ckt...I can tell that when testing with my 259b...Do you think the rfparts choke is robust enoug
/archives//html/Amps/2009-05/msg00143.html (8,830 bytes)

177. Re: [Amps] inexpensive HV fuse (score: 1)
Author: "k7rdx" <k7rdx@charter.net>
Date: Thu, 23 Jul 2009 09:43:00 -0700
Marv...Can you direct me to a roadmap for this type of device?I have always used series resistance in the B+ of my YC-156 amps but lightning fast high voltage cutoff seems a much better solution for
/archives//html/Amps/2009-07/msg00307.html (10,764 bytes)

178. Re: [Amps] spray painting metal (score: 1)
Author: "k7rdx" <k7rdx@charter.net>
Date: Fri, 31 Jul 2009 10:27:09 -0700
Zinc chromate primer after prepping with aluminum cleaner.Check with your local PPG dealer or any automotive refinish supplier..73,Jim..K7RDX..40++years in the collision repair business.. -- Original
/archives//html/Amps/2009-07/msg00441.html (10,660 bytes)

179. Re: [Amps] [Heathkit] The SB-220 (score: 1)
Author: "k7rdx" <k7rdx@charter.net>
Date: Sat, 22 Aug 2009 13:23:43 -0700
Any material be it nichrome,stainless steel,or any other poor conductive metal will de-tune the anodes and resist the tendency for parasitic occillation.It also lowers efficiency on the higher freque
/archives//html/Amps/2009-08/msg00387.html (11,011 bytes)

180. [Amps] YC-156/179/3CPX5000A7 tubes (score: 1)
Author: "k7rdx" <k7rdx@charter.net>
Date: Sat, 26 Sep 2009 11:10:27 -0700
Allen Bond has several late date code YC-156A/YC-179/3CPX5000A7 tubes in stock...Really good stuff at really decent prices...Anyone looking for these tubes give him a call or email..770-973-6251 or i
/archives//html/Amps/2009-09/msg00342.html (6,924 bytes)


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