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21. [AMPS] Circuit boards (score: 1): Author: k8cc@ix.netcom.com (David A. Pruett); Date: Fri, 22 Jan 1999 23:40:08 -0500; I've had good luck with these guys: Atlas Circuits Company P. O. Box 892 1500 Old Lake Road Lincolnton, NC 28092 704-735-3943 Turnaround has been less than two weeks from mailing in the artwork to bo; /archives//html/Amps/1999-01/msg00334.html (7,164 bytes)
22. [AMPS] Message subjects again (score: 1): Author: k8cc@ix.netcom.com (David A. Pruett); Date: Mon, 21 Dec 1998 00:10:40 -0500; Hey guys, you're doing it again. We've had a running discussion here on the reflector for with the subject Re: Fw: [AMPS] tuning capacitor & insulator for quite a while. The subject is no longer appl; /archives//html/Amps/1998-12/msg00304.html (7,388 bytes)
23. [AMPS] 50:75 ohm matching (score: 1): Author: k8cc@ix.netcom.com (David A. Pruett); Date: Thu, 24 Dec 1998 11:03:35 -0500; Up until I installed my 80M four-square using a ComTek switchbox, I would have agreed. My entire station (four towers and all monoband antennas) uses CATV hardline. For most bands I use asynchronous; /archives//html/Amps/1998-12/msg00374.html (8,598 bytes)
24. [AMPS] ICE Filters (score: 1): Author: k8cc@ix.netcom.com (David A. Pruett); Date: Fri, 25 Dec 1998 00:01:14 -0500; ICE filters are used quite frequently here at K8CC while competing in DX contests in the multi-operator, multi-transmitter class. I was an early purchaser of these filters, and have had mixed results; /archives//html/Amps/1998-12/msg00399.html (7,868 bytes)
25. [AMPS] Clipperton L & Bad tubes (score: 1): Author: k8cc@ix.netcom.com (David A. Pruett); Date: Mon, 5 Oct 1998 18:19:30 -0400; With regard to the comment about using 811-As rather than 572Bs, better first check the plate voltage. 572Bs can be run up to around 2.5KV while 811As are typically run around 1.5KV. Since the Clippe; /archives//html/Amps/1998-10/msg00030.html (8,680 bytes)
26. [AMPS] one-upmanship (score: 1): Author: k8cc@ix.netcom.com (David A. Pruett); Date: Sat, 17 Oct 1998 23:21:57 -0400; What I wish is that people would take the time to title their e-mails appropriately and not simply reply ad nauseum. In the past day or two we had an e-mail titled "re: L4B" where the topic was 2.3 G; /archives//html/Amps/1998-10/msg00244.html (7,660 bytes)
27. [AMPS] How to build the ultimate HF amplifier ? (score: 1): Author: k8cc@ix.netcom.com (David A. Pruett); Date: Fri, 30 Oct 1998 23:56:40 -0500; The description of the "ultimate amp" with separate pi-networks for each band reminds me of an amp that my friend N5DX (SK) picked up at the Delta Division convention one year back in the late sevent; /archives//html/Amps/1998-10/msg00516.html (8,666 bytes)
28. [AMPS] SB220 mod on 6 meter (score: 1): Author: k8cc@ix.netcom.com (David A. Pruett); Date: Wed, 3 Jun 1998 23:34:09 -0400; Noel, I just sold my SB-220 converted to 50 MHz. It worked very well - 100W in from a IC-756 resulted in 1000W out with the tubes showing no color. Efficiency appeared to be around 50%. In a nutshell; /archives//html/Amps/1998-06/msg00051.html (8,001 bytes)
29. [AMPS] 4-1000A Configuration (score: 1): Author: k8cc@ix.netcom.com (David A. Pruett); Date: Sat, 6 Jun 1998 00:53:13 -0400; John, reflector are correct. If you run moderately high plate voltage (3000-4500 VDC) you'll see about 10 dB gain. If you have a 200W exciter that might be OK for 1500W out but watch the grid current; /archives//html/Amps/1998-06/msg00096.html (8,532 bytes)
30. [AMPS] 8877 on 50 mhz (score: 1): Author: k8cc@ix.netcom.com (David A. Pruett); Date: Sat, 20 Jun 1998 10:26:50 -0400; Dick, Ham Radio magazine, July 1986, page 50 has a great article by Lauren Libby, KX0O (at least he was then) using a 3CX1000 with a Pi-L in a 6M amp. The same component parameters would apply. There; /archives//html/Amps/1998-06/msg00212.html (7,348 bytes)
31. [AMPS] 3CX800s in MLA-2500 (score: 1): Author: k8cc@ix.netcom.com (David A. Pruett); Date: Tue, 19 May 1998 19:32:14 -0400; However, this is not likely to be a conversion for the faint of heart. As K6GT pointed out, the mechanical cooling requirements are fundamentally different (axial vs. transverse) between 3CX800s and; /archives//html/Amps/1998-05/msg00367.html (8,479 bytes)
32. [AMPS] 8877 pulls (score: 1): Author: k8cc@ix.netcom.com (David A. Pruett); Date: Thu, 28 May 1998 23:40:03 -0400; As with anything used, caveat emptor applies to vacuum tube pulls. However, I bought a used 8877 some years ago thru a friend of a friend who does the swap and the tube works just fine. $175 sure bea; /archives//html/Amps/1998-05/msg00624.html (7,307 bytes)
33. [AMPS] Need Summer 96 Communications Quarterly (score: 1): Author: k8cc@ix.netcom.com (David A. Pruett); Date: Mon, 2 Mar 1998 23:10:14 -0500; Doug, W4DXV posted a note about the 4CX400 conversion being on Svetlana's web site. The last time I checked, the article was listed in the index on the web site but was not available for downloading.; /archives//html/Amps/1998-03/msg00017.html (8,072 bytes)
34. [AMPS] PT-2500A success story (score: 1): Author: k8cc@ix.netcom.com (David A. Pruett); Date: Wed, 25 Mar 1998 00:00:13 -0500; Just to add my two cents worth... I own a Viewstart (not B&W) PT-2500A amplifier that was purchased by a friend as the demo unit from the Dayton Hamvention in 1984. This amp was used at his QTH for m; /archives//html/Amps/1998-03/msg00401.html (8,032 bytes)

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