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1. [AMPS] Splatter avoidance (was 4cx10000) (score: 1): Author: k8cc@ix.netcom.com (David A. Pruett); Date: Sat, 10 Jul 1999 11:59:15 -0400; I see Jan's point - if your normal signal is operating around 1500W with a tube such as a 4CX10000 which can handle the leading edge spikes generated by some of the modern radios, less splatter will; /archives//html/Amps/1999-07/msg00178.html (8,393 bytes)
2. [AMPS] recommendations on hooking up 115vac converter (score: 1): Author: k8cc@ix.netcom.com (David A. Pruett); Date: Wed, 14 Jul 1999 00:31:30 -0400; Why is a discussion of mobile power configurations being discussed on a reflector dedicated to AMPLIFIERS? K8CC -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com A; /archives//html/Amps/1999-07/msg00265.html (7,919 bytes)
3. [AMPS] recommendations on hooking up 115vac converter (score: 1): Author: k8cc@ix.netcom.com (David A. Pruett); Date: Thu, 15 Jul 1999 10:53:15 -0400; Lane, That's not the point and you know it. Every time you have any sort of a technical question, or need any sort of a part, you post a message to this reflector, whether its related to AMPLIFIERS o; /archives//html/Amps/1999-07/msg00299.html (9,728 bytes)
4. [AMPS] measuring meter shunt resistance (score: 1): Author: k8cc@ix.netcom.com (David A. Pruett); Date: Fri, 18 Jun 1999 20:45:39 -0400; Lane, A better method rather than measuring the shunt is to set up a bench supply with a series limiting resistance to put a specified amount of current thru the meter/shunt assembly and calibrate it; /archives//html/Amps/1999-06/msg00525.html (9,131 bytes)
5. [AMPS] YC156 Photos (score: 1): Author: k8cc@ix.netcom.com (David A. Pruett); Date: Wed, 23 Jun 1999 22:56:25 -0400; Thanks to Larry, W7IUV for sharing the photos of his YC-156 amp. A month or so ago, KE9NA posted pix of his 4-1000A amp, which was very interesting also. I find it very useful to look at how people b; /archives//html/Amps/1999-06/msg00620.html (7,987 bytes)
6. [AMPS] TV Doorknobs as Plate Blockers (score: 1): Author: k8cc@ix.netcom.com (David A. Pruett); Date: Wed, 23 Jun 1999 23:12:38 -0400; "Make sure you have an RF choke accross the output of the amp because is is just a matter of time until those "TV" type doorknobs are going to smoke. They are not RF rated for 1500 watts." Not to arg; /archives//html/Amps/1999-06/msg00621.html (7,307 bytes)
7. [AMPS] Bridge vs. Doubler (score: 1): Author: k8cc@ix.netcom.com (David A. Pruett); Date: Tue, 4 May 1999 13:29:34 -0400; Regarding the question of the preferred HV P/s design, a full wave bridge vs. a doubler, I think the nod goes to the brdige for several reasons. First, I think the G3RZP comment about higher peak cur; /archives//html/Amps/1999-05/msg00037.html (9,534 bytes)
8. [AMPS] 3-500Z Grid Current Rating (score: 1): Author: k8cc@ix.netcom.com (David A. Pruett); Date: Tue, 4 May 1999 13:40:18 -0400; Mike, It sounds to me like your loading is too light, resulting in excessive grid current for the amount of output power. I've seen this often happen on amplifiers where the plate tuning C is critica; /archives//html/Amps/1999-05/msg00038.html (8,563 bytes)
9. [AMPS] Bridge vs. Doubler (score: 1): Author: k8cc@ix.netcom.com (David A. Pruett); Date: Tue, 4 May 1999 19:00:30 -0400; "because a doubler is full-wave -- i.e., current flows on both half cycles. The trouble with half-wave is that DC flows in the transformer's secondary winding." I'm afraid that I can't agree, but may; /archives//html/Amps/1999-05/msg00053.html (9,149 bytes)
10. [AMPS] Re: Brightest & Tenth Commandment (score: 1): Author: k8cc@ix.netcom.com (David A. Pruett); Date: Thu, 20 May 1999 23:08:09 -0400; Roy, Your comments were on the mark. Everyone knows God runs QRO... K8CC -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@co; /archives//html/Amps/1999-05/msg00257.html (7,587 bytes)
11. [AMPS] B&W PT2500 (score: 1): Author: k8cc@ix.netcom.com (David A. Pruett); Date: Sun, 4 Apr 1999 21:15:05 -0400; Brad, et al: I have a very early Viewstar PT-2500A. It was originally the demo unit at the 1984 Dayton Hamvention and sold to my friend WA8RRR for a discount. Rick used this amp for eight years befor; /archives//html/Amps/1999-04/msg00069.html (8,168 bytes)
12. [AMPS] B&W PT2500 (score: 1): Author: k8cc@ix.netcom.com (David A. Pruett); Date: Sun, 4 Apr 1999 21:28:31 -0400; Carl, Sound just like my amp. We've used a few of the 3CX800 amps here, and you just can't let them out of your sight. The Viewstar has been troublefree here. However, it HAS inflicted damage on some; /archives//html/Amps/1999-04/msg00070.html (8,713 bytes)
13. [AMPS] Cathode-driven questions (score: 1): Author: k8cc@ix.netcom.com (David A. Pruett); Date: Sun, 11 Apr 1999 22:30:46 -0400; Vic, Several amp designs back in the seventies used the parallel LC to ground for the input network. My favorite was in the July 1969 issue of CQ - "Separate KW Amplifiers For The Contestman" by K9LK; /archives//html/Amps/1999-04/msg00241.html (8,111 bytes)
14. [AMPS] 4X1 tuned input (score: 1): Author: k8cc@ix.netcom.com (David A. Pruett); Date: Sun, 11 Apr 1999 22:55:04 -0400; "I get about 4400-4600V on the plate under load, depending on line sag. I can only get about 280 ma of plate current, though. Grid current can be up to 100 ma depending on drive. Filament V is 7.5 un; /archives//html/Amps/1999-04/msg00242.html (8,199 bytes)
15. [AMPS] HV PS Diodes (score: 1): Author: k8cc@ix.netcom.com (David A. Pruett); Date: Wed, 28 Apr 1999 21:25:49 -0400; Does anybody here on the reflector have a recommendation on sources for HV power supply diode blocks? I'm thinking about building six single-band, single-tube 3-1000Z finals, and for space considerat; /archives//html/Amps/1999-04/msg00427.html (7,821 bytes)
16. [AMPS] Band Pass Filtering (score: 1): Author: k8cc@ix.netcom.com (David A. Pruett); Date: Thu, 29 Apr 1999 00:24:01 -0400; Where the filter needs to be located depends on what you're expecting it to do. ICE, Dunestar, TopTen, K4VX, W3NQN, et al have designed and built filters for HF applications which are used after the; /archives//html/Amps/1999-04/msg00433.html (10,453 bytes)
17. [AMPS] Care and feeding of your Eimac 3-500 (score: 1): Author: k8cc@ix.netcom.com (David A. Pruett); Date: Wed, 3 Mar 1999 22:46:27 -0500; I guess I'm lucky - I have a copy of that book. Its a medium-sized paperback dated 8/82 and in like-new condx. Funny - I can't recall where I got it. I suppose I should read it. 73, Dave/K8CC -- FAQ; /archives//html/Amps/1999-03/msg00076.html (8,187 bytes)
18. [AMPS] What (modern) tube to use? (score: 1): Author: k8cc@ix.netcom.com (David A. Pruett); Date: Fri, 19 Feb 1999 00:47:44 -0500; Joe Subich's note about which tube to use hit the nail on the head. W3LPL's recent post looking for 3-1000Zs illustrated how Eimac's exit from the glass tube market narrows our choices immensely. One; /archives//html/Amps/1999-02/msg00490.html (12,137 bytes)
19. [AMPS] What (modern) tube to use? (score: 1): Author: k8cc@ix.netcom.com (David A. Pruett); Date: Fri, 19 Feb 1999 10:14:45 -0500; I agree wholeheartedly with Terry about the 3CX1200A7. It has all the best characteristics of the 3-1000Z. Surprisingly, its an easy retrofit for a 3-1000Z amp too. Its not readily apparent unless yo; /archives//html/Amps/1999-02/msg00503.html (11,137 bytes)
20. [AMPS] Blowers, meters (score: 1): Author: k8cc@ix.netcom.com (David A. Pruett); Date: Sat, 27 Feb 1999 01:16:39 -0500; Does anyone have advice on a source for 1700 RPM blowers such as Rich describes? The only info I have is for Dayton out of the Grainger catalog and all the models listed are 3000+ RPM. Second, I know; /archives//html/Amps/1999-02/msg00679.html (7,765 bytes)

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