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141. Re: [Amps] Combining SS Amps (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Wed, 28 Mar 2007 17:20:12 -0400
Exactly what I was looking for. Tnx. Paul, W9AC _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2007-03/msg00378.html (6,725 bytes)

142. Re: [Amps] ACOM-1000 replacing tubes (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Fri, 20 Apr 2007 06:51:12 -0400
This is a "boilerplate" products liability notice. The procedure for tube replacement is no more difficult than that of any other amp manufactured for the amateur service. Paul, W9AC _______________
/archives//html/Amps/2007-04/msg00212.html (6,898 bytes)

143. Re: [Amps] 230v wiring question (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Tue, 24 Apr 2007 18:56:32 -0400
Good information, Tom. This is one reason why I replaced the excessively long #18 AWG line cords on my Alpha amps and replaced them with #10 AWG. In addition to the line cords, I am using #10 betwee
/archives//html/Amps/2007-04/msg00271.html (8,744 bytes)

144. Re: [Amps] 230v wiring question (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Wed, 25 Apr 2007 06:16:33 -0400
However, one can purchase 12/2 "Romex" type cable with or without ground. I believe the second number indicates the number of current-carrying conductors. So, 12/2 may have two wires, or 12/2 may ha
/archives//html/Amps/2007-04/msg00275.html (9,222 bytes)

145. Re: [Amps] 230v wiring question (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Wed, 25 Apr 2007 09:51:18 -0400
True, unless the device(s) connecting to the circuit utilize no neutral, in which case 12/2 w/GND is appropriate for a 20A circuit. Paul, W9AC _______________________________________________ Amps ma
/archives//html/Amps/2007-04/msg00281.html (9,458 bytes)

146. Re: [Amps] 230v wiring question (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Wed, 25 Apr 2007 10:33:57 -0400
Agreed as well. What can happen is that if someone mistakenly believes that by viewing a 30A breaker that one may also draw 30A from an existing 20A plug/outlet combination without first looking clo
/archives//html/Amps/2007-04/msg00286.html (10,387 bytes)

147. [Amps] Alpha "TUNE" Meter Function Calibration (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Fri, 4 May 2007 18:26:36 -0400
Anyone know the procedure for calibrating Alpha's "TUNE" LED meter function on the 86, 89, or 87A? Three pots are used on the logic control board to establish calibration. One sets the quiescent bias
/archives//html/Amps/2007-05/msg00035.html (7,063 bytes)

148. Re: [Amps] Bird wattmeter (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Wed, 9 May 2007 10:45:49 -0400
The LP-100 was designed with a special emphasis placed on the directional coupler in order to attain a very high degree of port directivity and isolation, and is an instrument that is capable of mor
/archives//html/Amps/2007-05/msg00089.html (9,300 bytes)

149. Re: [Amps] Sequencing an Alpha 87a (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Tue, 22 May 2007 19:44:24 -0400
Timing is always a concern between any amp and amplifier. However, I key my 7800 from its MOSFET switching transistor into an old Alpha 70V with a vacuum relay speed-up circuit, and an Alpha 77Dx. N
/archives//html/Amps/2007-05/msg00180.html (8,775 bytes)

150. Re: [Amps] Sequencing an Alpha 87a (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Tue, 22 May 2007 19:45:55 -0400
Okay, I'll correct myself...should read "between any rig and amplifier." Paul, W9AC _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/
/archives//html/Amps/2007-05/msg00181.html (6,855 bytes)

151. Re: [Amps] Sequencing an Alpha 87a (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Wed, 23 May 2007 22:05:48 -0400
Dick, I can speak only of my own experience with the 7800 and to date, I have not run into any PA issues. Over the past few days, there's been a related discussion on the Yahoo 7800 group. Over a ~
/archives//html/Amps/2007-05/msg00186.html (8,105 bytes)

152. Re: [Amps] Sequencing an Alpha 87a (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Thu, 24 May 2007 07:05:39 -0400
I believe QST's expanded product reviews cover the transmit delay time and transmit receive turnaround time, but an actual scope representation of the full sequence would be a welcome addition. I us
/archives//html/Amps/2007-05/msg00190.html (8,751 bytes)

153. Re: [Amps] Transformer question (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Sun, 8 Jul 2007 22:00:58 -0400
Carl, That's correct and not just for appliances. Here's one real world potential problem: If a 120V blower is used in a 240 VAC amp (e.g., older Alpha & Henry), and one lead of the blower is connec
/archives//html/Amps/2007-07/msg00101.html (11,324 bytes)

154. Re: [Amps] Jennings and Kilovac vacuum relays for sale (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Mon, 9 Jul 2007 11:45:13 -0400
relay anyone has found??" Matsushita RSD-12V Paul, W9AC _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2007-07/msg00117.html (8,559 bytes)

155. Re: [Amps] Re 200w fast relay (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Mon, 9 Jul 2007 14:16:59 -0400
says c2000 from Matsushita). I'll get samples and test them and publish the results." Tom, WD7S made some measurements back in 2004 although more testing is always a good thing: http://home.earthlin
/archives//html/Amps/2007-07/msg00123.html (8,116 bytes)

156. Re: [Amps] Amateur Radio Vet Turns 100 (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Wed, 17 Oct 2007 21:00:47 -0400
Hard to believe anyone from that era is still with us. If he was licensed in the early '20s, he likely operated spark, witnessed the birth of CW and the ultimate erosion of spark, was around for the
/archives//html/Amps/2007-10/msg00207.html (7,577 bytes)

157. Re: [Amps] Vertex_Yaesu Merger (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Tue, 6 Nov 2007 07:08:43 -0500
According to the press release, if the deal goes through, Motorola will have 80% controlling interest in VS (Yaesu). Here in the U.S., such announced deals are often referred to as mergers, joint-ve
/archives//html/Amps/2007-11/msg00077.html (8,579 bytes)

158. Re: [Amps] Alpha 87A Mic Click Grid Current Spike (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Thu, 8 Nov 2007 18:29:06 -0500
Start by taking the transceiver RF out of the equation. Remove only the coaxial cable between the 87A and transceiver.and key the amp's PTT line with the transceiver. Even better, bypass the transce
/archives//html/Amps/2007-11/msg00116.html (7,133 bytes)

159. Re: [Amps] Peter W Dahl Co (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Fri, 7 Dec 2007 16:34:36 -0500
31. Apparently Mr. Dahl's health is not too good." That's a shame. I somewhat suspected something was awry over the summer when I tried to order higher KVA transformers for my older Alpha amps. At t
/archives//html/Amps/2007-12/msg00042.html (7,915 bytes)

160. [Amps] Alpha Teflon Coaxial Cable (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Thu, 20 Mar 2008 16:33:33 -0400
Anyone know the RG type of the smaller diameter Teflon-jacketed coaxial cable used in the Alpha 86/87/89 series amps? Its diameter is in between RG-174 and RG-58. Paul, W9AC _________________________
/archives//html/Amps/2008-03/msg00189.html (6,420 bytes)

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