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Total 31 documents matching your query.

1. [Amps] QSk with SB-200 (score: 1): Author: paule at sfu.ca (paule@sfu.ca); Date: Tue Jul 22 08:17:45 2003; Hi Adam, I know someone has done a variation of Rich Measures circuit for the 200. I had the circuit but lost it when my harddisk crashed. I may have it elsewhere if you do not hear from the author h; /archives//html/Amps/2003-07/msg00120.html (8,072 bytes)
2. [Amps] Grid grounding material? (score: 1): Author: paule at sfu.ca (paule@sfu.ca); Date: Tue Apr 8 13:37:01 2003; I am getting ready to directly ground the grids of the 3-500's in one of my SB-220s'.I have some copper strap that I was planning on using, but was wondering if I should tin the whole piece to preven; /archives//html/Amps/2003-04/msg00083.html (6,613 bytes)
3. [Amps] SB-220 C-21 question (score: 1): Author: paule at sfu.ca (paule@sfu.ca); Date: Mon Apr 14 10:44:47 2003; I was looking at a freinds SB-220 and found that C21 (a .02 cap across the tube side of the filament choke) had been removed. Any reason why this should be taken out? Should I replace it? The amp app; /archives//html/Amps/2003-04/msg00138.html (6,482 bytes)
4. [Amps] SB-220 improved efficiency in CW? (score: 1): Author: paule at sfu.ca (paule@sfu.ca); Date: Wed Apr 16 17:48:24 2003; I have been wondering about the possibilities of improving the efficiency of the SB220 in cw mode. Looking at the AL-82 I see they use two zeners in series and short one out to deal with the necessar; /archives//html/Amps/2003-04/msg00178.html (6,874 bytes)
5. [Amps] power cord strain relief recommendations? (score: 1): Author: paule at sfu.ca (paule@sfu.ca); Date: Mon Apr 28 09:01:39 2003; I am rewiring a couple of SB-220 amps for 220 and need to replace the existing cords with 12-3. Anyone have any recommendations for type and sources of appropriate strain reliefs? cheers, Paul - VA7N; /archives//html/Amps/2003-04/msg00222.html (6,764 bytes)
6. [Amps] SB220 - qsk photos? (score: 1): Author: paule at sfu.ca (paule@sfu.ca); Date: Wed Mar 26 23:49:22 2003; I am planning on putting qsk with vacuum relays in a couple of SB220's and have the circuit in need, but was wondering if anyone had any pictures of their installations? I am looking for ideas for th; /archives//html/Amps/2003-03/msg00862.html (6,374 bytes)
7. [Amps] verniers for SB220 (score: 1): Author: paule at sfu.ca (paule@sfu.ca); Date: Mon Mar 31 16:09:30 2003; Has anyone found any vernier mechanisms that can be used with the SB220 without having to damage the front panels or at least keeping the damage to a minimum. Having vernier dials would make tuning/b; /archives//html/Amps/2003-03/msg00959.html (6,427 bytes)
8. [Amps] SB-200 power switch (score: 1): Author: paule at sfu.ca (paule@sfu.ca); Date: Thu Feb 6 15:58:07 2003; Anyone know a good replacement for the SB-200 power switch? The one in mine, just failed, (will not allow the amp to be turned off...) cheers, Paul - VA7NT ex VE7CQK - email: paule@sfu.ca "Those who; /archives//html/Amps/2003-02/msg00113.html (6,311 bytes)
9. [Amps] HV caps and transformer ? (score: 1): Author: paule at sfu.ca (paule@sfu.ca); Date: Thu Aug 7 06:44:57 2003; A friend of mine is in need of the following: 1 - .00047uF 20Kv Doorknob or transmitting cap of some sort (anything so long as it can handle at least 20 Kv RF. 2 - a 500pf 10Kv RF rated cap of some s; /archives//html/Amps/2002-09/msg00334.html (6,514 bytes)
10. [Amps] SB 200 input network rework? (score: 1): Author: paule@sfu.ca (paule@sfu.ca); Date: Sat, 01 Jun 2002 11:36:13 PDT; Has anyone reworked the input network to allow it to be more easily driven by a solid state transciever? I'm hoping to avoid reinventing the wheel, if possible? cheers, Paul - VA7NT ex VE7CQK - email; /archives//html/Amps/2002-06/msg00008.html (6,817 bytes)
11. [Amps] WTB: SB 220 10/15 meter plate coil (score: 1): Author: paule@sfu.ca (paule@sfu.ca); Date: Fri, 14 Jun 2002 13:58:16 PDT; A SB220 I am restoring is missing the 10/15 meter plate coil. Does anyone have one they are willing to part with for a reasonable price? Failing that can someone supply me with the physical dimension; /archives//html/Amps/2002-06/msg00099.html (6,533 bytes)
12. [Amps] QSK amp switching (Ts940/Alpha 86) (score: 1): Author: paule@sfu.ca (paule@sfu.ca); Date: Thu, 16 May 2002 8:15:11 PDT; Well, I am getting closer to dealing with the audio thump I am trying to eliminate in my ts-940/alpha 86 combo. Doing the agc mod has helped a lot, but there remains an annoying click at the break of; /archives//html/Amps/2002-05/msg00242.html (6,999 bytes)
13. [Amps] Alpha 86 questions (score: 1): Author: paule@sfu.ca (paule@sfu.ca); Date: Mon, 20 May 2002 13:12:39 PDT; Any Alpha 86 owers there? Would like to compare notes on a couple of issues. cheers, Paul - VA7NT ex VE7CQK - email: paule@sfu.ca "Those who hear not the music. . . think the dancers mad."; /archives//html/Amps/2002-05/msg00317.html (6,342 bytes)
14. [Amps] QSK amp switching with a TS-940s (score: 1): Author: paule@sfu.ca (Paul Erickson); Date: Mon, 22 Apr 2002 11:40:51 -0700; Anyone have any experience using a TS-940s to key an Alpha 86 amp at qsk speeds. The existing relay in the 940 appear to be too slow. I have a mod for replacing the relay with a high voltage fet. Any; /archives//html/Amps/2002-04/msg00516.html (7,227 bytes)
15. [Amps] Re: TS-940s - Mod for Amplifier relay - for QSK] (score: 1): Author: paule@sfu.ca (Paul Erickson); Date: Tue, 23 Apr 2002 13:01:50 -0700; It was Shack Looks like there are a couple of options for replacing the amp relay with a FET. One drives the gate from D59 and the other from JP-26. The latter has the advantage of being about 3ms fa; /archives//html/Amps/2002-04/msg00535.html (9,394 bytes)
16. [Amps] Soft key circuit for SB-200 (score: 1): Author: paule@sfu.ca (Paul Erickson); Date: Sat, 27 Apr 2002 15:00:35 -0700; Anyone have a circuit for a soft key circuit for the SB-200? I know Harbach has one, but I would like to build up my own, if possible, and I am wanting to avoid reworking the bias circuit ala Rich's; /archives//html/Amps/2002-04/msg00583.html (6,562 bytes)
17. [Amps] QSK amp siwtching with a TS940 almost there (score: 1): Author: paule@sfu.ca (Paul Erickson); Date: Tue, 30 Apr 2002 07:29:30 -0700; Thanks for all the replies. Replacing the relay with an IRF840 has allowed the 940 to switch the Alpha86 at qsk speeds, however there is one remaining problem. When using the speaker, everything is f; /archives//html/Amps/2002-04/msg00598.html (6,752 bytes)
18. [Amps] Fans for 4cx1000/1500 question (score: 1): Author: paule@sfu.ca (Paul Erickson); Date: Mon, 04 Mar 2002 12:28:04 -0800; I need to know how to determine if the following fans will be adequate for an 4cx1000/1500 amp. While I can find the cfm specs, I cannot find the back pressure specs. Can anyone help me out? The fans; /archives//html/Amps/2002-03/msg00050.html (7,922 bytes)
19. [Amps] Re: Martin's retro panels ? (score: 1): Author: paule@sfu.ca (Paul Erickson); Date: Fri, 08 Mar 2002 13:35:05 -0800; I was wondering about others experiences with Martins panels? I bought one, and it was dented in the center about 1" out of true, and there was no evidence on the package that it had happened during; /archives//html/Amps/2002-03/msg00192.html (7,253 bytes)
20. [Amps] WTB: doorknob caps and fan for 4cx1000/1500 amp (score: 1): Author: paule@sfu.ca (paule@sfu.ca); Date: Tue, 26 Feb 2002 9:31:54 PST; I have a long term project to build a couple of amps around the 4cx1000/1500 and am looking for appropriate dc blocking doorknob caps and cooling fans. Anyone have anything suitable? cheers, Paul - V; /archives//html/Amps/2002-02/msg00287.html (6,496 bytes)

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