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1. [AMPS] Euro Sub For Eimac (score: 1): Author: k1ta@contesting.com (Bob Marston); Date: Tue, 05 Feb 2002 08:35:26 -0800; Hi Jim The only manufacturer of the 3CX800A7 outside of Eimac is Svetlana. Morel Grunberg, 4X1AD, did some investigating on this matter a couple of years ago. And found the the Svetlana tubes to be 3; /archives//html/Amps/2002-02/msg00059.html (7,785 bytes)
2. [AMPS] Building new 4-1000A amp (score: 1): Author: k1ta@contesting.com (Bob Marston); Date: Fri, 04 Jan 2002 09:51:52 -0800; There are a number of factors that effect voltage regulation the 2 most important are IR drop of the transformer windings and the Permeability of the core. The size of the capacitor bank has minimal; /archives//html/Amps/2002-01/msg00053.html (8,993 bytes)
3. [AMPS] Tube Choices - Deliberations (score: 1): Author: k1ta@contesting.com (Bob Marston); Date: Tue, 25 Dec 2001 13:27:36 -0800; Hi Phil If you want my opinion the GS-35b is your best choice. Triode circuitry is a little simpler. The 35b has a unique feature, the anode cooler separates from the tube. It requires a little more; /archives//html/Amps/2001-12/msg00477.html (9,305 bytes)
4. [AMPS] Russian tubes (score: 1): Author: k1ta@contesting.com (Bob Marston); Date: Fri, 09 Nov 2001 07:58:05 -0800; had experience using these on HF and VHF, found tubes? Hi Richard I to have a couple of GS-35Bs. I'm still in the parts gathering stage for my amp. There is quite a bit of information available on th; /archives//html/Amps/2001-11/msg00158.html (6,944 bytes)
5. [AMPS] New FETs (score: 1): Author: k1ta@contesting.com (Bob Marston); Date: Tue, 27 Nov 2001 20:59:35 -0800; Here is the url for the Press Release John referred to. The file is in PDF format http://www.advancedpower.com/pressreleases/pressreleasedata/20011010161613.pdf Bob Marston K1TA -- FAQ on WWW: http:/; /archives//html/Amps/2001-11/msg00450.html (7,757 bytes)
6. [AMPS] Glitch Protection (score: 1): Author: k1ta@contesting.com (Bob Marston); Date: Sun, 26 Aug 2001 18:58:21 -0700; I have a question for the group that I have seen discussed before. It regards glitch protection. It has already been pointed out that fusing the HV supply line provides little if any protection due t; /archives//html/Amps/2001-08/msg00355.html (7,871 bytes)
7. [AMPS] FT100D driving Alpha 87a (score: 1): Author: k1ta@contesting.com (Bob Marston); Date: Tue, 31 Jul 2001 20:56:55 -0700; Hams from your neck of the woods are the proponents of the G2DAF Amplifier Design. Yet few if any will admit to the Fecalance Factor of this design. Now we have another Ham from SM Land promoting a m; /archives//html/Amps/2001-07/msg00002.html (8,347 bytes)
8. [AMPS] Making tubes (score: 1): Author: k1ta@contesting.com (Bob Marston); Date: Thu, 05 Jul 2001 23:18:03 -0700; homebrew to actually make the tube from scratch ? Let me answer the last part first. Billy the start up costs involved in designing and manufacturing a transmitting size tube is astronomical. Remembe; /archives//html/Amps/2001-07/msg00070.html (9,023 bytes)
9. [AMPS] FT100D driving Alpha 87a (score: 1): Author: k1ta@contesting.com (Bob Marston); Date: Sun, 29 Jul 2001 07:35:04 -0700; for. One would suppose it is as clean as a G2DAF. -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: own; /archives//html/Amps/2001-07/msg00356.html (8,368 bytes)
10. [AMPS] Replacing 8873 (score: 1): Author: k1ta@contesting.com (Bob Marston); Date: Tue, 19 Jun 2001 07:16:45 -0700; Hi Chris In the matter of locating a replacement 8873 for an SB-230 you are quite correct. As they have been out of production for a number of years your friend's chances are slim at best. If you wan; /archives//html/Amps/2001-06/msg00154.html (8,338 bytes)
11. [AMPS] 4-1000A Project (score: 1): Author: k1ta@contesting.com (Bob Marston); Date: Tue, 03 Apr 2001 22:51:28 -0700; Hmmmmmmm the B&W 800 and 802 are plate chokes The tank coil assemblies that include a band switch that were manufactured by B&W are the 850 and 852. Seems to me I recall a couple of years ago that so; /archives//html/Amps/2001-04/msg00051.html (9,273 bytes)
12. [AMPS] metal fabricators for rf decks (score: 1): Author: k1ta@contesting.com (Bob Marston); Date: Mon, 05 Mar 2001 08:32:22 -0800; Hi John Thanks for the info and the link. That kind of info is always appreciated 73s Bob -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: a; /archives//html/Amps/2001-03/msg00041.html (6,928 bytes)
13. [AMPS] Meter Protection for Drake L7 (score: 1): Author: k1ta@contesting.com (Bob Marston); Date: Sat, 10 Mar 2001 11:24:41 -0800; Michael all silicon diodes need .7 volts before they conduct current. Germanium .3 volts. The coil resistance for most meters is typically very low. I have never seen a schematic including diode prot; /archives//html/Amps/2001-03/msg00070.html (7,572 bytes)
14. [AMPS] GS35B vs. 8877 Tube (score: 1): Author: k1ta@contesting.com (Bob Marston); Date: Sat, 10 Mar 2001 12:28:13 -0800; Bill the answer to that is both yes and no. Both tubes have a maximum plate dissipation of 1500 watts Both tubes operate at the same plate voltage 2500 to 3500 volts The 8877 filament requirements ar; /archives//html/Amps/2001-03/msg00073.html (8,117 bytes)
15. [AMPS] 3CX3000A7 (score: 1): Author: k1ta@contesting.com (Bob Marston); Date: Sun, 11 Mar 2001 07:49:56 -0800; Answer Not much The 3CX-3000A7 is notorius as being a Pig to drive. The spec sheet states that 410 watts is required to drive it to 2.0 Amps of plate current. With 100 watts don't expect much more th; /archives//html/Amps/2001-03/msg00080.html (8,642 bytes)
16. [AMPS] SB-220 Amplifiers and Garage Sales!! (score: 1): Author: k1ta@contesting.com (Bob Marston); Date: Thu, 22 Mar 2001 08:51:39 -0800; This from the person who posted an inquiry to this list 3 weeks ago on whether he should buy an SB-230. The nexus of the question revolved around whether he could obtain replacement tubes and what op; /archives//html/Amps/2001-03/msg00193.html (9,820 bytes)
17. [AMPS] SB-220: Operate/Standby Switch (score: 1): Author: k1ta@contesting.com (Bob Marston); Date: Mon, 05 Feb 2001 05:41:32 -0800; fisted....... That may be true Rich but most companies don't think long run. That is why planned obsolescence is the dominant mode in automobile manufacturing. For every Mercedes there are several Fo; /archives//html/Amps/2001-02/msg00111.html (9,454 bytes)
18. [AMPS] Test (score: 1): Author: k1ta@contesting.com (Bob Marston); Date: Wed, 14 Feb 2001 18:55:32 -0800; Is this thing working ? -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amps@contesting.com; /archives//html/Amps/2001-02/msg00240.html (6,819 bytes)
19. [AMPS] Hello Hello (score: 1): Author: k1ta@contesting.com (Bob Marston); Date: Mon, 19 Feb 2001 20:10:25 -0800; Is this thing working ? -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amps@contesting.com; /archives//html/Amps/2001-02/msg00257.html (6,501 bytes)
20. [AMPS] Eimac - Care and Feeding of Power Grid Tubes (score: 1): Author: k1ta@contesting.com (Bob Marston); Date: Sat, 06 Jan 2001 22:20:44 -0800; Ian I don't pretend to know Rich's motivation for his "personal attacks". What I do know is that Care and Feeding has been up on the Web in its nearly totally incomplete state for at least 2 years. I; /archives//html/Amps/2001-01/msg00226.html (9,859 bytes)

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