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61. Re: [Amps] B&W plate choke (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Wed, 13 Apr 2005 08:44:29 -0400
I believe Dick Bryd, N4UQ still has a B&W upgrade program where he takes your #800 in on trade and then issues out a re-wound #802 choke (on old #800 ceramic cores) from his bench inventory. I used
/archives//html/Amps/2005-04/msg00252.html (7,691 bytes)

62. Re: [Amps] 3 or 4 wire 240v for amp (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Wed, 4 May 2005 07:24:43 -0400
The white wire in your electrical box should be the Neutral but you should verify that you measure approx. 115-120VAC between the white wire and either side of the 240VAC black and red wires. Finally
/archives//html/Amps/2005-05/msg00040.html (8,897 bytes)

63. Re: [Amps] Alpha 78 (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Wed, 25 May 2005 17:05:37 -0400
As an alternative, both Home Depot and Lowes will computer-match the paint on-site if you bring the panel in. I did this with a very old Alpha at one time and the resulting match was perfect. I supp
/archives//html/Amps/2005-05/msg00292.html (7,396 bytes)

64. Re: [Amps] Alpha 87A OMEGA (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Wed, 15 Jun 2005 20:48:40 -0400
Although I attended Dayton this year, my eyes must have passed by the 87A-Omega. The Alpha web site makes reference to a sneak preview at the convention. Anyone have any more info on the new Alpha a
/archives//html/Amps/2005-06/msg00105.html (7,257 bytes)

65. Re: [Amps] RE : copper or silver in tank circuit? (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Fri, 17 Jun 2005 16:27:48 -0400
Mike, Very nice explanation as to the application differences between silver and gold. One aspect of the discussion that may be worth discussing is the difference in seating/unseating contact repeata
/archives//html/Amps/2005-06/msg00138.html (8,085 bytes)

66. Re: [Amps] 220 amp power supply plugs (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Thu, 23 Jun 2005 10:55:10 -0400
Tom, For the past fifteen years or so, I have been standardizing my own 240VAC amp connections with twist-lock plugs and sockets. Home Depot carries the Leviton brand but Hubbell, Pass & Seymour, an
/archives//html/Amps/2005-06/msg00202.html (7,673 bytes)

67. Re: [Amps] anode connector?? (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Mon, 11 Jul 2005 19:07:58 -0400
George, it should work just fine and that looks like a good substitute for the original 3CV1500A7. If you're careful, you can probably drill and tap right between a pair of the cooling fins - and ev
/archives//html/Amps/2005-07/msg00095.html (7,939 bytes)

68. Re: [Amps] anode connector?? (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Mon, 11 Jul 2005 19:55:49 -0400
Nothing really, except it could be argued that it isn't quite as mechanically rigid as a bolted contact . In fact, a stainless-steel hose clamp is used on the existing 3CV1500A7 in that amp to compr
/archives//html/Amps/2005-07/msg00098.html (7,277 bytes)

69. Re: [Amps] Step Start (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Fri, 12 Aug 2005 11:35:36 -0400
Speaking of Step-Start circuits, I recommend placing a fuse of suitable size in series with one of the step-start resistors. If the circuit "steps" but fails to "start," which results in a failure o
/archives//html/Amps/2005-08/msg00431.html (7,816 bytes)

70. Re: [Amps] Tokyo Hi-Power HL-2.5Kfx (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Sun, 21 Aug 2005 10:59:52 -0400
Looks like it will be an excellent solid-state amp. However, at ~ $5K USD, it needs to incorporate QSK as a standard feature. -Paul, W9AC _______________________________________________ Amps mailing
/archives//html/Amps/2005-08/msg00634.html (8,940 bytes)

71. Re: [Amps] Alpha releases New Amp 9500 (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Fri, 16 Sep 2005 12:07:38 -0400
USB ports are not the panacea they're made out to be. I have several USB-enabled devices in my shack that do not function properly, including a new USB keyer interface that I've been fighting to mak
/archives//html/Amps/2005-09/msg00146.html (7,481 bytes)

72. Re: [Amps] Alpha releases New Amp 9500 (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Sat, 17 Sep 2005 20:11:23 -0400
Then how much speed do you need between your PC and the amplifier given the limited amount of data transfer anyway? -Paul, W9AC _______________________________________________ Amps mailing list Amps
/archives//html/Amps/2005-09/msg00187.html (8,439 bytes)

73. Re: [Amps] alpha 87a and Pro II question (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Tue, 11 Oct 2005 22:43:30 -0400
Unless a separate "Drive" control is accessible to the operator, it takes a dual-speed ALC loop to completely address the problem. The trick is designing ALC to respond fast enough to inhibit leadin
/archives//html/Amps/2005-10/msg00297.html (9,466 bytes)

74. Re: [Amps] Alphas and 781s (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Wed, 12 Oct 2005 20:18:05 -0400
I've seen the same phenomenon with my 77Dx. Anyone know why the CW waveform should distort with a lower Ep when the amp is not over-driven and Ig is well within limits? -Paul, W9AC _________________
/archives//html/Amps/2005-10/msg00302.html (6,636 bytes)

75. Re: [Amps] AC wiring (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Thu, 20 Oct 2005 09:36:51 -0400
10AWG is probably the minimum I would use for a new electrical installation. A few years ago, I ran 4-pole 240VAC with #10 over a 60-foot run for use with my Alpha amps. At 1500W, the line voltage s
/archives//html/Amps/2005-10/msg00491.html (8,479 bytes)

76. Re: [Amps] AC wiring (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Thu, 20 Oct 2005 10:13:35 -0400
I use two Alphas on one circuit run. But, I have to plug & unplug depending on which amp I'm using. Here's a question for the NEC experts out there. Since I only use one amplifier at a time, can I p
/archives//html/Amps/2005-10/msg00496.html (9,246 bytes)

77. Re: [Amps] AC wiring (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Fri, 21 Oct 2005 16:41:23 -0400
I ran a 30-amp breaker with a 30-amp Hubbell Twist-Lock socket/connector in the shack. Using approx. 60-feet of #10 AWG in a four-wire configuration. Paul, W9AC . ___________________________________
/archives//html/Amps/2005-10/msg00522.html (8,346 bytes)

78. Re: [Amps] Question about safety ground connection (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Sun, 13 Nov 2005 17:47:11 -0500
Many of us on this list with older Alpha and Henry amplifiers are using 4-wire, 240VAC circuits for this very reason. The topic has been discussed here on multiple occasions and useful related infor
/archives//html/Amps/2005-11/msg00163.html (7,807 bytes)

79. Re: [Amps] Question about safety ground connection (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Sun, 13 Nov 2005 18:09:28 -0500
No current should normally flow through the ground wire except in the event of a fault condition. 120VAC current in a 240VAC configuration usually results from the manufacturer's use of 120VAC blowe
/archives//html/Amps/2005-11/msg00165.html (8,923 bytes)

80. Re: [Amps] 220V wiring: Was Question about safety ground connection (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Thu, 17 Nov 2005 08:10:30 -0500
I believe there's some validity to Rich's point, although I'm a firm believer in 4-wire 240VAC circuits, and both of my older Alpha amplifiers are configured as such. But what bothers me about codes
/archives//html/Amps/2005-11/msg00267.html (10,656 bytes)

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