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Total 68 documents matching your query.

61. [Amps] 144 MHz GS35B update (score: 1)
Author: N1BUG <paul@n1bug.com>
Date: Mon, 1 May 2017 14:40:37 -0400
I'm seeing more RF output with the new configuration, about 500W for somewhere around 25W drive. It appears I am going to have some fun getting the input SWR down but I guess everyone does. That's pr
/archives//html/Amps/2017-05/msg00008.html (7,467 bytes)

62. Re: [Amps] 144 MHz GS35B update (score: 1)
Author: N1BUG <paul@n1bug.com>
Date: Mon, 1 May 2017 16:50:47 -0400
There we go. After reviewing pictures of several other amplifiers using this tube I removed one more turn from the coil on the tube side of the T match. Input SWR is 1:1 and the amp is making over 60
/archives//html/Amps/2017-05/msg00021.html (7,874 bytes)

63. Re: [Amps] 144 MHz GS35B update (score: 1)
Author: N1BUG <paul@n1bug.com>
Date: Mon, 1 May 2017 20:53:58 -0400
I've got a little more than that. My supply is 4100V no load and typically 3900 at 1500W out. Paul Carl _______________________________________________ Amps mailing list Amps@contesting.com http://li
/archives//html/Amps/2017-05/msg00026.html (7,602 bytes)

64. Re: [Amps] Tube amps are not a thing of the past (score: 1)
Author: N1BUG <paul@n1bug.com>
Date: Mon, 5 Jun 2017 14:15:43 -0400
I just cut the anode off a dud 4CX1000A. The control grid structure cannot be seen until I determine how to cut away the screen grid without destroying the control grid which I am going to guess is n
/archives//html/Amps/2017-06/msg00053.html (10,506 bytes)

65. Re: [Amps] Pole pigs removed from oil ?? (score: 1)
Author: N1BUG <paul@n1bug.com>
Date: Fri, 3 Nov 2017 04:56:32 -0400
Back in the '90s I used two in parallel for my EME amplifier. It wasn't that I was running great power (1500W out) but they were 13.2 kV pigs that I removed a bunch of wire from to get them down to w
/archives//html/Amps/2017-11/msg00006.html (8,513 bytes)

66. Re: [Amps] Vac relay coils in series ? (score: 1)
Author: N1BUG <paul@n1bug.com>
Date: Thu, 17 Mar 2022 08:36:45 -0400
Me too. Never had a coil fail but have had contacts fail on RJ1A relays. 73, Paul N1BUG 73, Roy  K6XK Had a NC contact fail on a RJ1A. 73, Jim W7RY What is the 'normal'  failure mode for a vac relay
/archives//html/Amps/2022-03/msg00025.html (8,219 bytes)

67. Re: [Amps] 2m GS35B Amplifier (score: 1)
Author: Paul N1BUG FN55mf <paul@n1bug.com>
Date: Sat, 1 Oct 2022 08:52:33 -0400
For whatever it may be worth, my 2m GS35b amp doesn't show any tuning drift at all running with 75 watts drive and 1300 watts out. It uses a quarter wave tubular plate line. Efficiency is about 55% w
/archives//html/Amps/2022-10/msg00001.html (11,857 bytes)

68. Re: [Amps] 2m GS35B Amplifier (score: 1)
Author: Paul N1BUG FN55mf <paul@n1bug.com>
Date: Sat, 1 Oct 2022 14:28:48 -0400
Hi David, That could be. I have two more tubes I should test to see how they behave in the amp. Paul N1BUG You could be lucky with your tube. Googling "GS35b tuning drift" will yield many examples. D
/archives//html/Amps/2022-10/msg00006.html (15,147 bytes)

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