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References: [ +from:royanjoy@ncn.net: 309 ]

Total 309 documents matching your query.

221. Re: [Amps] fils show diff brightnesses (score: 1)
Author: "Roy Koeppe" <royanjoy@ncn.net>
Date: Sat, 29 Jul 2006 10:23:51 -0500
About, "Today I was running my SB-220 with the case off, and noticed, to my surprise, that the filaments of the two tubes show quite different brightness reflected off the desk under the amplifier, e
/archives//html/Amps/2006-07/msg01300.html (7,395 bytes)

222. Re: [Amps] AL-80B trouble (score: 1)
Author: "Roy Koeppe" <royanjoy@ncn.net>
Date: Fri, 25 Aug 2006 11:07:22 -0500
Stated; "...SYMPTOM: With the standby switch in standby, band-switch set for 80M, AC power applied to Amp, the meters read ~2700Vdc (normal is ~3000Vdc), 150ma Ip, and the Ig is showing a negative dr
/archives//html/Amps/2006-08/msg00655.html (7,372 bytes)

223. Re: [Amps] TL-922 question (score: 1)
Author: "Roy Koeppe" <royanjoy@ncn.net>
Date: Wed, 30 Aug 2006 15:48:16 -0500
About: "...Attempting to drive a load other than 50 Ohms or run power above the design specifications for the amplifier can certainly result in "running out of room" on the loading cap. (etc.)" Incre
/archives//html/Amps/2006-08/msg00825.html (7,822 bytes)

224. Re: [Amps] feedback for Eddy (score: 1)
Author: "Roy Koeppe" <royanjoy@ncn.net>
Date: Wed, 27 Sep 2006 09:05:55 -0500
Eddy asks: "...I have NEVER, EVER employed vacuum-type capacitors of any kind in all of my 35 years in Ham radio. From your personal experience, are they electrically stable...? Might I expect this u
/archives//html/Amps/2006-09/msg00321.html (6,429 bytes)

225. Re: [Amps] RF Parts in biz (score: 1)
Author: "Roy Koeppe" <royanjoy@ncn.net>
Date: Thu, 5 Oct 2006 08:19:09 -0500
I just received a pair of 572-Bs from them two weeks ago--everything fine. 73, Roy K6XK _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.c
/archives//html/Amps/2006-10/msg00043.html (6,127 bytes)

226. Re: [Amps] toroid L section... (score: 1)
Author: "Roy Koeppe" <royanjoy@ncn.net>
Date: Thu, 30 Nov 2006 08:49:12 -0600
Asked, "Hello! I'm building my own h.m. PA with GU-84B tube. The output tank will be a Pi-L network. I just got few T225-2B toroids (I Powder, 2.25" O.D. x 1.0" Height) for my L-coil. I wonder what i
/archives//html/Amps/2006-11/msg00279.html (6,648 bytes)

227. Re: [Amps] is selling amps parts OK...? (score: 1)
Author: "Roy Koeppe" <royanjoy@ncn.net>
Date: Thu, 30 Nov 2006 10:06:21 -0600
"Good day to everyone. I just signed onto the list and would like to know if it ok to list RF amplifier parts for sale on this list?" YES! 73, Roy K6XK _______________________________________________
/archives//html/Amps/2006-11/msg00282.html (6,625 bytes)

228. Re: [Amps] RF Parts tubes (score: 1)
Author: "Roy Koeppe" <royanjoy@ncn.net>
Date: Sun, 17 Dec 2006 12:07:43 -0600
" Does anyone here have any knowledge of the "taylor" 572B's advertised by RF parts?? " My experience with Taylor 572B's from RFP is they are rather short-lived, about one year's worth of daily use o
/archives//html/Amps/2006-12/msg00116.html (6,947 bytes)

229. Re: [Amps] LK-550 mixing tubes (score: 1)
Author: "Roy Koeppe" <royanjoy@ncn.net>
Date: Wed, 20 Dec 2006 15:00:16 -0600
"...One of the tubes recently developed a screen to grid short. The two existing tubes are regular Eimac 3-500z with the redish ceramic base. Does my replacement tube need to be an Eimac or can I sub
/archives//html/Amps/2006-12/msg00181.html (6,706 bytes)

230. Re: [Amps] power supply transformer (score: 1)
Author: "Roy Koeppe" <royanjoy@ncn.net>
Date: Tue, 30 Jan 2007 14:48:57 -0600
About, "Why do I need to use a transformer in the first place, can I not simply rectify and filter the two legs of the 240 without a transformer?" A full wave rectifier (not a bridge) utilizing a cho
/archives//html/Amps/2007-01/msg00335.html (7,504 bytes)

231. Re: [Amps] full range C vs. padders (score: 1)
Author: "Roy Koeppe" <royanjoy@ncn.net>
Date: Sat, 31 Mar 2007 12:12:40 -0600
About: My 160m/80m/40m/20m amp design calls for a 250pF Ctune and 1500pF Cload. "I notice some designs use capacitors with the full capacitance range variables, while others use lower-value variables
/archives//html/Amps/2007-03/msg00417.html (8,400 bytes)

232. Re: [Amps] 572B (score: 1)
Author: "Roy" <royanjoy@ncn.net>
Date: Sun, 1 Jul 2007 10:03:03 -0500
"did Amperex make a 572B/T160L ?? just wondering" c.s. never saw or heard of one r.k. _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com
/archives//html/Amps/2007-07/msg00005.html (6,473 bytes)

233. [Amps] Re 200w fast relay (score: 1)
Author: "Roy" <royanjoy@ncn.net>
Date: Mon, 9 Jul 2007 10:57:42 -0500
"Which makes me ask, what is the best high speed low power relay anyone has found?? Something suitable for 200 watts or less, but not a vacuum relay." Replacements for OMNI-5, OMNI-6, Orion, etc. For
/archives//html/Amps/2007-07/msg00118.html (6,751 bytes)

234. [Amps] Re 200w fast relay (score: 1)
Author: "Roy" <royanjoy@ncn.net>
Date: Tue, 10 Jul 2007 09:57:23 -0500
Thanks, But I not ask the question--I answered it. 73, Roy K6XK Roy: The Mastushita RSD-12V relay works well for under 200W. Note that in a 50 ohm system, the current and voltage will be 2A and 100V
/archives//html/Amps/2007-07/msg00150.html (8,778 bytes)

235. Re: [Amps] T/R schemes (score: 1)
Author: "Roy" <royanjoy@ncn.net>
Date: Thu, 18 Oct 2007 08:36:40 -0500
About, "Just a simple question.... What are most of you homebrew amp builders using for TR switching in amps? PB relays? Vacuum Relays? PIN diodes? If you are using Vacuum Relays....and are using sur
/archives//html/Amps/2007-10/msg00210.html (6,504 bytes)

236. Re: [Amps] Bird 1 KW (etc) (score: 1)
Author: "Roy" <royanjoy@ncn.net>
Date: Sat, 17 Nov 2007 15:17:22 -0600
"I have a good old reliable dummy load, as shown in the picture:" All that stuff looks like it came from Ma Bell? Maybe via a lunch box over time? 73, Roy K6XK _______________________________________
/archives//html/Amps/2007-11/msg00234.html (6,196 bytes)

237. [Amps] Re. SB-220 (score: 1)
Author: "Roy" <royanjoy@ncn.net>
Date: Sat, 22 Dec 2007 12:01:59 -0600
"I'm redoing my SB-221, I put in a Harbach capacitor kit and want to replace the high voltage wire and am wondering a source for this wirer? Its say its blue in the manual but mines red I really don'
/archives//html/Amps/2007-12/msg00205.html (6,779 bytes)

238. Re: [Amps] filament supply d.c. or a.c. (score: 1)
Author: "Roy" <royanjoy@ncn.net>
Date: Wed, 13 Feb 2008 10:55:57 -0600
Asked, "Looking for reliable information regarding filament supply to amplifier tubes. What are the pros and cons for D.C or A.C volts." Definition of 'filament' indicates a directly-heated cathode.
/archives//html/Amps/2008-02/msg00084.html (6,746 bytes)

239. [Amps] 8873 available for SB-230 (score: 1)
Author: "Roy" <royanjoy@ncn.net>
Date: Mon, 14 Apr 2008 11:10:55 -0500
The filament (heater) pin contactors in the tube socket of my SB-230 burned up. But the tube is fine with full output. Rather than replace the "29-pin" socket when no new tube is available under $800
/archives//html/Amps/2008-04/msg00190.html (7,004 bytes)

240. Re: [Amps] 8873...spoken for (score: 1)
Author: "Roy" <royanjoy@ncn.net>
Date: Mon, 14 Apr 2008 12:54:20 -0500
73 to all who responded. Roy, K6XK Iowa _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2008-04/msg00192.html (6,122 bytes)

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