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61. Re: [Amps] Relays (score: 1): Author: Vic K2VCO <vic@rakefet.com>; Date: Wed, 02 Apr 2008 11:42:01 -0700; Yes, absolutely. I forgot to mention that I make connections to the relays with thin strips of copper foil (0.002" thick, cut to about 1/8" width). I bought a big roll of this at a hobby shop. The co; /archives//html/Amps/2008-04/msg00042.html (8,661 bytes)
62. Re: [Amps] Relays (score: 1): Author: TexasRF@aol.com; Date: Wed, 2 Apr 2008 14:59:11 EDT; I always wondered how to achieve that "Thuuuuung" sound at key down. 73/k5gw In a message dated 4/2/2008 12:39:57 P.M. Central Standard Time, km1h@jeremy.mv.com writes: With a real amp the blower noi; /archives//html/Amps/2008-04/msg00043.html (10,318 bytes)
63. Re: [Amps] Relays (score: 1): Author: Pat Barthelow <aa6eg@hotmail.com>; Date: Wed, 2 Apr 2008 12:01:37 -0700; I once used some solder wick lengths as a flexible RF conductor at various places in an HF amp, that needed a small amount of movement flexibility. Seemed to work OK, Incredibly fine, woven copper co; /archives//html/Amps/2008-04/msg00044.html (10,461 bytes)
64. Re: [Amps] Relays (score: 1): Author: "Alex" <alexeban@gmail.com>; Date: Wed, 2 Apr 2008 22:19:57 +0300; .... I'll explain that noise point: In order to reduce the intrinsic resistance of the PIN diode, you have - especially with the BIG high power ones- to pass about 200mA or more through the receive d; /archives//html/Amps/2008-04/msg00045.html (14,471 bytes)
65. Re: [Amps] Relays (score: 1): Author: "Alex" <alexeban@gmail.com>; Date: Wed, 2 Apr 2008 22:30:32 +0300; They DO have a reliability problem. Don't forget that the OFF diode has to be back biased by at least 3 times the RF voltage at the relevant power level: that means approximately 800V at the 1kW leve; /archives//html/Amps/2008-04/msg00047.html (10,410 bytes)
66. Re: [Amps] Relays (score: 1): Author: John/K4WJ <k4wj@bellsouth.net>; Date: Wed, 02 Apr 2008 16:34:02 -0400; Alex, "RECEIVER LINE INSERTION LOSS: Guaranteed less than 0.6 db. Typical loss = 0.2 db" I don't know how Doc Sheller, K8RR, made the measurements. He didn't mention noise. I wonder if he was aware o; /archives//html/Amps/2008-04/msg00051.html (9,567 bytes)
67. Re: [Amps] Relays (score: 1): Author: "jeremy-ca" <km1h@jeremy.mv.com>; Date: Wed, 2 Apr 2008 17:39:29 -0400; It requires a few healthy sized open frame relays doing duty in the DC circuits and two good old Dow Keys for the RF. At least thats what is used here on the AM KW station. A D-104 handles the actual; /archives//html/Amps/2008-04/msg00058.html (10,880 bytes)
68. Re: [Amps] Relays (score: 1): Author: Paul Kelley N1BUG <paul.kelley.n1bug@gmail.com>; Date: Thu, 03 Apr 2008 14:28:21 -0400; I think you are asking about "store bought" amps, which I can't address. Certainly for homebrew amps using smallish vacuum relays it is easy to get in the 4-5ms range or less. As has been mentioned,; /archives//html/Amps/2008-04/msg00078.html (8,266 bytes)

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