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81. [AMPS] Need Alpha 374A Mods. (score: 1): Author: paulc@mediaone.net (Paul Christensen); Date: Sat, 1 May 1999 19:26:02 -0400; Bill, click on the URL below. It is a link from Alpha-Power's web page that points to a comparison table of all ETO/Alpha amps no longer in production. http://pw2.netcom.com/~v31ry/legacy.htm 73, -Pa; /archives//html/Amps/1999-05/msg00007.html (8,874 bytes)
82. [AMPS] Purchase Recommendation? (score: 1): Author: paulc@mediaone.net (Paul Christensen); Date: Tue, 4 May 1999 10:55:42 -0400; because ALC After taking great pains to modify the ALC circuitry in my Ten-Tec Omni Six Plus, it became apparent to me, for the first time, that a tradeoff exists between choosing an optimum ALC tim; /archives//html/Amps/1999-05/msg00033.html (8,337 bytes)
83. [AMPS] Purchase Recommendation? (score: 1): Author: paulc@mediaone.net (Paul Christensen); Date: Tue, 4 May 1999 15:52:57 -0400; None of my Alpha amps are bothered by the leading edge power spike. It was something I noticed in my attempt to clean-up the leading edge of the Omni Six in order to mainatin leading and falling edg; /archives//html/Amps/1999-05/msg00046.html (9,531 bytes)
84. [AMPS] ? Omni VI and Alpha 87A in QSK ? (score: 1): Author: paulc@mediaone.net (Paul Christensen); Date: Wed, 7 Apr 1999 10:12:51 -0400; I believe you are correct John. Rather than using the Omni's internal AMP relay. a simple modification to the Omni's Control Board takes care of this: 1) Rather than use the Omni's AMP relay, use the; /archives//html/Amps/1999-04/msg00138.html (10,013 bytes)
85. [AMPS] Alpha 87A (score: 1): Author: paulc@mediaone.net (Paul Christensen); Date: Sun, 7 Mar 1999 14:38:44 -0500; I've been test driving my new Alpha 87A for the past week. Dick is right: once you try it, you'll wonder how you got along without it. It's damn-near a miracle to see the amp switch from 160 to 10-me; /archives//html/Amps/1999-03/msg00145.html (8,127 bytes)
86. [AMPS] Acom 2000A amp by Finnfet? (score: 1): Author: paulc@mediaone.net (Paul Christensen); Date: Sun, 7 Mar 1999 19:28:41 -0500; Looks like someone reverse-engineered the 87A and added a remote user interface. Judging by the pics on their web page, the component layout is nearly identical to the 87A. What is the U.S. price? -P; /archives//html/Amps/1999-03/msg00150.html (8,681 bytes)
87. [AMPS] Instant ON.. (score: 1): Author: paulc@mediaone.net (Paul Christensen); Date: Thu, 18 Mar 1999 20:54:47 -0500; need to tune the amp? Hi Jon, For me, it allows me to 1) tune the amp faster, rather than waiting 3-5 minutes for an indirectly-heated cathode to come to temperature, and 2) I can generally tune the; /archives//html/Amps/1999-03/msg00454.html (8,047 bytes)
88. [AMPS] Svetlana 4CX800A (score: 1): Author: paulc@mediaone.net (Paul Christensen); Date: Wed, 24 Mar 1999 22:43:21 -0500; I am working on an amplifier for a friend which appears to be in need of a pair of Svetlana 4CX800A tetrodes. The amp was damaged in shipping and the tubes were found dislodged in their silicone rubb; /archives//html/Amps/1999-03/msg00606.html (7,150 bytes)
89. [AMPS] Rapid Warmup Indirectly Heated Cathode Tubes (score: 1): Author: paulc@mediaone.net (Paul Christensen); Date: Mon, 11 Jan 1999 12:36:57 -0500; Is life expectancy dependent on whether the filament is directly or indirectly heated? I know that in commercial FM applications, leaving the filament running on metal-ceramic tubes for extended per; /archives//html/Amps/1999-01/msg00145.html (9,095 bytes)
90. [AMPS] Alpha 77DX grid current (score: 1): Author: paulc@mediaone.net (Paul Christensen); Date: Sat, 23 Jan 1999 17:03:40 -0500; You are correct Dan. Several years ago, I spoke with Ray Heaton, ETO's Service Manager in the early '90s. He confirmed that the 77Dx was deliberately designed to indicate approximately double the tr; /archives//html/Amps/1999-01/msg00339.html (9,179 bytes)
91. [AMPS] Re: SERIOUS commentary from N4XY on "no-code" and "bounced" submission to [CW] from Bob Marston, K1TA [LONG] but please read all (score: 1): Author: paulc@mediaone.net (Paul Christensen); Date: Thu, 28 Jan 1999 13:36:45 -0500; Is there an amplifier "tie-in" to this discussion that we've missed? -Paul -- Original Message -- From: Andy Wallace <andywallace@home.com> To: Bob Marston <k1ta@earthlink.net> Cc: Peter Chadwick <Pe; /archives//html/Amps/1999-01/msg00541.html (12,131 bytes)
92. [AMPS] Electronic Bias Switching (score: 1): Author: paulc@mediaone.net (Paul Christensen); Date: Mon, 28 Dec 1998 11:20:10 -0500; As I was searching through the database of my new QST collection on CD-ROM, I found an interesting suggestion from an old acquaintance and mentor of mine, Barry Boothe, W9UCW of "The Minooka Special"; /archives//html/Amps/1998-12/msg00443.html (8,268 bytes)
93. [AMPS] Electronic Bias Switching (score: 1): Author: paulc@mediaone.net (Paul Christensen); Date: Mon, 28 Dec 1998 16:27:23 -0500; Rich, Thanks for your reply. As is almost always the case, there are trade-offs associated with every change, some more obvious than others. -Paul, W9AC from ? However, some various fault possibiliti; /archives//html/Amps/1998-12/msg00450.html (9,980 bytes)
94. [AMPS] Jennings Vacuum Variable Source (score: 1): Author: paulc@mediaone.net (Paul Christensen); Date: Mon, 9 Nov 1998 09:41:09 -0500; Aside from Peter Dahl, Fair Radio, Davilyn, and Surplus Sales of Nebraska, can anyone suggest a source for a Jennings UCS-400-75 (400 pF @ 7.5KV) vacuum variable capacitor? I am adding ETO's 160-mete; /archives//html/Amps/1998-11/msg00126.html (7,250 bytes)
95. [AMPS] ETO/Alpha Electronic Bias Switching (score: 1): Author: paulc@mediaone.net (Paul Christensen); Date: Mon, 9 Nov 1998 11:16:11 -0500; Over the weekend, I re-activated the electronic bias switch in one of my PA-70V vapor-cooled amps. Prior to this change, bias was fixed, pursuant to some information I received from another "vapor" o; /archives//html/Amps/1998-11/msg00129.html (7,556 bytes)
96. [AMPS] Thermostatic Switch Supplier (score: 1): Author: paulc@mediaone.net (Paul Christensen); Date: Sun, 29 Nov 1998 15:50:28 -0500; I am helping another PA-70V vapor owner search for the source of a 100-degree-Celsius N.C. thermostatic switch. The originals are roughly the diameter of penny and just a bit thicker. Anyone know a s; /archives//html/Amps/1998-11/msg00371.html (7,104 bytes)
97. [AMPS] Thermostatic Switch Supplier (score: 1): Author: paulc@mediaone.net (Paul Christensen); Date: Sun, 29 Nov 1998 17:08:20 -0500; With some perseverance this afternoon, I found the replacement thermo-switch source for the PA-70V. Anyone wishing to thermally protect their amplifier may want to consider using these switches. In t; /archives//html/Amps/1998-11/msg00373.html (8,775 bytes)
98. [AMPS] PA70V (score: 1): Author: paulc@mediaone.net (Paul Christensen); Date: Fri, 30 Oct 1998 09:24:05 -0500; This is a multi-part message in MIME format. --=_NextPart_000_0088_01BE03E7.09EE6660 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Dan, Like anything else; /archives//html/Amps/1998-10/msg00499.html (14,265 bytes)
99. [AMPS] Alpha H.V. Rectifier Source (score: 1): Author: paulc@mediaone.net (Paul Christensen); Date: Sat, 5 Sep 1998 14:36:06 -0400; In my continued pursuit of finalizing my Alpha PA-70V rebuild, I discovered that a nylon H.V. feedthrough jack between the power supply and R.F. cabinet is causing my H.V. flashover, not the 3CV1500A; /archives//html/Amps/1998-09/msg00073.html (8,740 bytes)
100. [AMPS] Re: Alpha H.V. Rectifier Source (score: 1): Author: paulc@mediaone.net (Paul Christensen); Date: Sat, 5 Sep 1998 19:22:39 -0400; I should have conducted a web search first. SEMTECH continues to offer the original SCH5000 H.V. rectifiers factory-direct and through distributors. Anyone wanting to know the exact specifications of; /archives//html/Amps/1998-09/msg00076.html (9,662 bytes)

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