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141. Re: [Amps] 8877 won't load on 80M (score: 1): Author: n8de@thepoint.net; Date: Wed, 13 Mar 2013 21:11:15 -0400; Perhaps it is NOT the 'blocking' cap, but the 'loading' cap that is switched in on 80m. If it is not of sufficient capacitance, the amp won't tune/load. 73 Don N8DE I finally got around to digging ou; /archives//html/Amps/2013-03/msg00197.html (8,750 bytes)
142. Re: [Amps] SB-230 Power Question (score: 1): Author: n8de@thepoint.net; Date: Tue, 19 Mar 2013 07:57:13 -0400; The SB-230 was designed to be used with the SB-104 which had slightly lower output on 10m than the other bands. My experience with my SB-230 (still have it, but don't use it) was that 650 watts was p; /archives//html/Amps/2013-03/msg00253.html (8,430 bytes)
143. Re: [Amps] SB-230 Power Question (score: 1): Author: n8de@thepoint.net; Date: Tue, 19 Mar 2013 16:52:16 -0400; Paul, I agree, though I didn't notice that earlier. 73 Don N8DE I admit, I don't know anything about the SB-230, but 100W drive seems excessive for an 8875/8874, is there some sort of attenuation for; /archives//html/Amps/2013-03/msg00256.html (9,183 bytes)
144. Re: [Amps] instability issue (score: 1): Author: n8de@thepoint.net; Date: Wed, 27 Mar 2013 07:18:30 -0400; Sounds like a resonance in the RF Choke. Have you checked for that? Do you have a frequency counter to detect the oscillating frequency? 73 Don N8DE I'm trying to understand a problem with one of my; /archives//html/Amps/2013-03/msg00340.html (8,470 bytes)
145. Re: [Amps] Dentron Clipperton L Problem (score: 1): Author: n8de@thepoint.net; Date: Thu, 15 Aug 2013 08:22:41 -0400; What band? If this is occurring on 160m .. check the plate loading caps and bandswitch. If it occurs on 20 - 10m, the problem is probably the bandswitch. 73 Don N8DE Hello all, I just picked up a Den; /archives//html/Amps/2013-08/msg00099.html (11,891 bytes)
146. Re: [Amps] GU-74b amp by UX1UX (score: 1): Author: n8de@thepoint.net; Date: Fri, 16 Aug 2013 15:54:43 -0400; While attending the Friedrichshafen 'Ham Radio' gathering in June, I was told that the GU-74b is no longer being manufactured, so is not available in any large supply for replacement/repair. For this; /archives//html/Amps/2013-08/msg00101.html (7,438 bytes)
147. Re: [Amps] Participate in NASA experiment (score: 1): Author: n8de@thepoint.net; Date: Sun, 06 Oct 2013 14:24:37 -0400; Read carefully. It will take MINUTES to send "HI" ... and your callsign is NOT included. This is interesting only in that it might involve ham radio. 73 Don N8DE Just received this from Tim. Sounds i; /archives//html/Amps/2013-10/msg00077.html (8,266 bytes)
148. Re: [Amps] Participate in NASA experiment (score: 1): Author: n8de@thepoint.net; Date: Mon, 07 Oct 2013 13:21:20 -0400; AM might prove an interesting change ... except the 'assigned' frequencies are not AM part of the band. 73 Don N8DE Maybe we should all try AM... we can QSO, and assist in the test at the same time.; /archives//html/Amps/2013-10/msg00103.html (9,975 bytes)
149. [Amps] meters (score: 1): Author: n8de@thepoint.net; Date: Sun, 29 Dec 2013 18:53:43 -0500; Have two matched, unused NOS 1 ma DC fullscale meters that fit in a 2 1/2" round hole, but come with a bezel that is 3 7/8" x 2 5/16" for 'behind the panel' mounting. They are 3 5/8" x 2 3/4" overall; /archives//html/Amps/2013-12/msg00173.html (6,397 bytes)
150. [Amps] FS: MT3000A 'clone' (score: 1): Author: n8de@thepoint.net; Date: Fri, 31 Jan 2014 21:53:49 -0500; Having worked for Dentron many years back, and buying many parts from the company, I planned on building an 'ultimate' antenna tuner. That project never got finished, but the parts are all here. Sell; /archives//html/Amps/2014-01/msg00356.html (6,840 bytes)
151. Re: [Amps] Working on my Darwin award (score: 1): Author: n8de@thepoint.net; Date: Sun, 23 Feb 2014 22:59:58 -0500; The late Jim Ringland, W8JIN, had a great amplifier built into his wall next to the shack desk which had a door in the front which allowed the changing of 'plug-in' coils for the finals. This door ha; /archives//html/Amps/2014-02/msg00245.html (11,361 bytes)
152. Re: [Amps] Clipperton L (score: 1): Author: n8de@thepoint.net; Date: Mon, 07 Apr 2014 21:31:25 -0400; Failure of component/s in power supply. 73 Don N8DE Hello: Today when I turned on my Clipperton L This happened / amp power up makes loud hum relay clicks rapidly blows fuse / amp is wired for 120 v.; /archives//html/Amps/2014-04/msg00082.html (7,139 bytes)
153. Re: [Amps] Don't Pass This One Up Boys! (score: 1): Author: n8de@thepoint.net; Date: Thu, 31 Jul 2014 20:06:17 -0400; Looks like someone turned the meter 90 degrees and it's supposed to be rare, huh? CB amps grind me. 73 Don N8DE "Rare serial number 23." Does the seller mean to imply that other serial numbers are mo; /archives//html/Amps/2014-07/msg00122.html (8,710 bytes)
154. Re: [Amps] Amp Supply LK500ZB - strange failure mode (score: 1): Author: n8de@thepoint.net; Date: Thu, 02 Oct 2014 16:05:22 -0400; Sounds like a faulty bias zener. Don N8DE Wonder if anyone has experienced this failure mode with this or a similar amp: This amp is 80s vintage and since then has been a solid performer, grounded gr; /archives//html/Amps/2014-10/msg00003.html (8,130 bytes)
155. [Amps] Dentron Amp (score: 1): Author: n8de@thepoint.net; Date: Sun, 19 Oct 2014 17:36:30 -0400; Kathy, The Dentron amp will work on 17m and 12m (not permitted on 30m), BUT ... the RF choke MIGHT burn up if it is not modified to remove resonances in those bands. The usual mod is to remove 2 to 4; /archives//html/Amps/2014-10/msg00200.html (6,787 bytes)
156. Re: [Amps] Transformer needed (score: 1): Author: n8de@thepoint.net; Date: Tue, 28 Oct 2014 10:10:14 -0400; If you're willing to do the rewind, I have a dead Clipperton-L transformer that might be just right. Make me an offer I can't refuse (you pay shipping). 73 Don N8DE I'm looking for a plate transforme; /archives//html/Amps/2014-10/msg00229.html (7,884 bytes)
157. Re: [Amps] LoTW question (score: 1): Author: n8de@thepoint.net; Date: Thu, 05 Feb 2015 08:07:22 -0500; Yes, Go to their website: http://www.navassadx.com/ 73 Don N8DE Quoting donroden@hiwaay.net: Does anyone know if K1N has started uploading their logs yet ? Thanks Don W4DNR __________________________; /archives//html/Amps/2015-02/msg00059.html (7,435 bytes)
158. [Amps] 8877 tubes (score: 1): Author: n8de@thepoint.net; Date: Thu, 11 Jun 2015 15:40:44 -0400; Good news! Mt European 'source' has quoted a lower price on these tubes! (he has 15 total tubes available) NEW Chinese MKS 8877 tubes : $550 Use Eimac MRI pulls: $375 I can bring them back with me ne; /archives//html/Amps/2015-06/msg00023.html (6,485 bytes)
159. [Amps] alive and looking for 8873 (score: 1): Author: n8de@thepoint.net; Date: Fri, 09 Oct 2015 07:34:23 -0400; The reflector is alive and well.. Now .. does anyone have a source for an 8873 tube for my Heathkit SB-230? 73 Don N8DE 59 +10 and all is well. Ken N4zed --Original Message-- From: Amps [mailto:amps-; /archives//html/Amps/2015-10/msg00012.html (8,351 bytes)
160. Re: [Amps] Need for bias switch (CW/SSB) (score: 1): Author: n8de@thepoint.net; Date: Tue, 12 Jan 2016 10:35:30 -0500; Most amps that have that switch are Class C on CW and some class AB (1 or 2) on SSB. That switch is used to change the bias on the tube to change amp class. 73 Don N8DE Folks I am putting a 8877 amp; /archives//html/Amps/2016-01/msg00003.html (8,118 bytes)

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