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21. [AMPS] RJ-iAvacuum relay (score: 1): Author: paulc@mediaone.net (Paul Christensen); Date: Tue, 21 Aug 2001 09:10:18 -0400; Here's a link to Allen's vacuum relay page. I'm not sure if he hi-pot tests or not. It would be worth a message or call to him to find out. He's got a lot of other high power-related stuff too... htt; /archives//html/Amps/2001-08/msg00260.html (11,251 bytes)
22. [AMPS] Tetrode poor IMD performance (score: 1): Author: paulc@mediaone.net (Paul Christensen); Date: Wed, 22 Aug 2001 12:07:38 -0400; I found the following information to be very interesting regarding alleged tetrode performance. What they're saying is that a current-regulated screen grid ensures linearity regardless of drive power; /archives//html/Amps/2001-08/msg00288.html (11,369 bytes)
23. [AMPS] SICK ALPHA 77DX (score: 1): Author: paulc@mediaone.net (Paul Christensen); Date: Tue, 12 Jun 2001 10:19:58 -0400; This has always been a concern of mine and in fact an older Alpha PA-70V I restored suffered from this: At one point during the restoration process, the +28 VDC supply failed upon start-up. Since thi; /archives//html/Amps/2001-06/msg00105.html (9,983 bytes)
24. [AMPS] Review of Antenna Tuner from Dayton (score: 1): Author: paulc@mediaone.net (Paul Christensen); Date: Wed, 20 Jun 2001 08:18:05 -0400; The Palstar AT4K looks like a great, well-built tuner. I was considering one recently until I ran across an ad from John Bliss in Electric Radio which describes a high power balanced/unbalanced tune; /archives//html/Amps/2001-06/msg00180.html (9,134 bytes)
25. [AMPS] Review of Antenna Tuner from Dayton (score: 1): Author: paulc@mediaone.net (Paul Christensen); Date: Wed, 20 Jun 2001 12:32:33 -0400; You can find a great image of the Measures balanced tuner at the following link. This "real man's" tuner was constructed by Matt, KK5DR. Nice job Matt! http://www.qsl.net/kk5dr/Zepptuner.html -Paul,; /archives//html/Amps/2001-06/msg00190.html (9,562 bytes)
26. [AMPS] Review of Antenna Tuner from Dayton (score: 1): Author: paulc@mediaone.net (Paul Christensen); Date: Wed, 20 Jun 2001 13:44:34 -0400; Here's a link to a photo of another awesome tuner provided to me by Phil, K5PC. Phil's design is similar to that as shown on the cover of the 1999 ARRL Handbook. Phil's tuner uses a balun at the tune; /archives//html/Amps/2001-06/msg00192.html (10,338 bytes)
27. [AMPS] Review of antenna tuner from Dayton (score: 1): Author: paulc@mediaone.net (Paul Christensen); Date: Wed, 20 Jun 2001 16:48:21 -0400; One of the simplest, practical, and cost-effective solutions to those who use open feeder/ladder line with multi-band antennas is the approach re-introduced by Cecil, W6RCA. Cecil has been an advoca; /archives//html/Amps/2001-06/msg00199.html (10,555 bytes)
28. [AMPS] amp control (score: 1): Author: paulc@mediaone.net (Paul Christensen); Date: Wed, 27 Jun 2001 07:43:38 -0400; parts, I'm not sure about the 77-series, but my Alpha PA-70V accommodates high-speed VOX in its "Break-In" mode. The amp remains keyed and the output network is coupled back into a small tuned RF am; /archives//html/Amps/2001-06/msg00293.html (8,504 bytes)
29. [AMPS] RMS Power (score: 1): Author: paulc@mediaone.net (Paul Christensen); Date: Thu, 28 Jun 2001 11:44:19 -0400; This is a multi-part message in MIME format. --=_NextPart_000_00A1_01C0FFC7.AADF2760 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Bill, Isn't the RMS; /archives//html/Amps/2001-06/msg00311.html (15,090 bytes)
30. [AMPS] SB 220 on 6 meter (score: 1): Author: paulc@mediaone.net (Paul Christensen); Date: Wed, 2 May 2001 13:15:28 -0400; It seems designing an accurate transmitter ALC system is more art than science. If the ALC is too fast as in the stock Ten-Tec Omni Six, one encounters leading edge envelope distortion, particularly; /archives//html/Amps/2001-05/msg00031.html (8,150 bytes)
31. [AMPS] Conjugate Matching In Class B and C Amplifiers (score: 1): Author: paulc@mediaone.net (Paul Christensen); Date: Sat, 12 May 2001 16:20:09 -0400; It's interesting to note (and rightfully so) that space has been given to Walt in a League publication. Could they possibly believe there may be some truth in what he's been advocating all along? -Pa; /archives//html/Amps/2001-05/msg00221.html (11,671 bytes)
32. [AMPS] Bird Wattmeter Slug Failure (score: 1): Author: paulc@mediaone.net (Paul Christensen); Date: Wed, 21 Mar 2001 16:48:49 -0500; While tuning up my amp on 40-meters this morning, I managed to burn-up my 2.5 KW (Bird 2500H) element. As I brought the amp's power up to 1KW, I noticed that the Bird 43 was arcing inside and a few s; /archives//html/Amps/2001-03/msg00181.html (6,810 bytes)
33. [AMPS] SB-220: Operate/Standby Switch (score: 1): Author: paulc@mediaone.net (Paul Christensen); Date: Tue, 6 Feb 2001 09:50:14 -0500; However, most commercial amps, including every commercial transmitter in the AM/FM broadcast industry use a rheostat to control filament voltage. In commercial applications, it's common practice to; /archives//html/Amps/2001-02/msg00135.html (16,311 bytes)
34. [AMPS] 77SX (score: 1): Author: paulc@mediaone.net (Paul Christensen); Date: Tue, 2 Jan 2001 15:46:59 -0500; The 77Sx is normally wired for 120-N-120 here is the USA. In this configuration, Neutral carries current only for the 77Sx's 120 VAC blower. The remainder of the amp is supplied by the 240 VAC potent; /archives//html/Amps/2001-01/msg00061.html (8,858 bytes)
35. [AMPS] 77SX (score: 1): Author: paulc@mediaone.net (Paul Christensen); Date: Tue, 2 Jan 2001 16:15:36 -0500; Change to read to better clarify: "For export use, the modification to adapt to European electrical standards can be found in the 77Sx manual. It requires several changes to the AC input terminal str; /archives//html/Amps/2001-01/msg00065.html (9,228 bytes)
36. [AMPS] AL-1200 Blower (score: 1): Author: paulc@mediaone.net (Paul Christensen); Date: Wed, 6 Dec 2000 15:13:58 -0500; Is it possible to modify the AL-1200 blower such that the blower winding is in series with the HV transformer primary winding as Alpha does with their older amps? In effect, as the R.F. output power; /archives//html/Amps/2000-12/msg00099.html (10,336 bytes)
37. [AMPS] SB-230 8877 Tube availability (score: 1): Author: paulc@mediaone.net (Paul Christensen); Date: Thu, 7 Dec 2000 14:06:48 -0500; Carl, I believe the SB-230 utilizes the 8873 conduction-cooled triode, not the 8877. I believe the 8873 is still readily available but they're quite expensive given there limited performance capabili; /archives//html/Amps/2000-12/msg00117.html (8,711 bytes)
38. [AMPS] 240VAC Amplifier Wiring (score: 1): Author: paulc@mediaone.net (Paul Christensen); Date: Tue, 14 Nov 2000 10:49:40 -0500; This is a multi-part message in MIME format. --=_NextPart_000_0095_01C04E28.96D0D260 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable As I begin to add a 2; /archives//html/Amps/2000-11/msg00131.html (13,770 bytes)
39. [AMPS] 240VAC Amplifier Wiring (score: 1): Author: paulc@mediaone.net (Paul Christensen); Date: Tue, 14 Nov 2000 12:06:27 -0500; Chuck, In your case, it appears you ran a neutral, but you are not using it with the Henry. I just pulled my Alpha 77Dx manual again. Vic's concerns relating to an open neutral are even more apparent; /archives//html/Amps/2000-11/msg00138.html (11,119 bytes)
40. [AMPS] 240VAC Amplifier Wiring (score: 1): Author: paulc@mediaone.net (Paul Christensen); Date: Tue, 14 Nov 2000 12:11:28 -0500; 2 There There is in this case because the amplifier's 120VAC blower has no 120VAC tap. Thus, a neutral is still required. See follow-up posting. you I should be OK from this persepctive and I also c; /archives//html/Amps/2000-11/msg00139.html (9,367 bytes)

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