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Total 92 documents matching your query.

61. Re: [Amps] Silicone hose from Flex Technologies (score: 1)
Author: "Jerry Kaidor" <jerry@tr2.com>
Date: Thu, 26 Jul 2012 22:12:41 -0700 (PDT)
** I have used this method to make cast-on-site door seals for old cars. You clean everything with lacquer thinner, and smear the door post with Vaseline. Put a healthy bead of black silicone on the
/archives//html/Amps/2012-07/msg00293.html (8,731 bytes)

62. Re: [Amps] Silicone hose from Flex Technologies (score: 1)
Author: "Jerry Kaidor" <jerry@tr2.com>
Date: Thu, 26 Jul 2012 22:12:51 -0700 (PDT)
** I have used this method to make cast-on-site door seals for old cars. You clean everything with lacquer thinner, and smear the door post with Vaseline. Put a healthy bead of black silicone on the
/archives//html/Amps/2012-07/msg00294.html (8,491 bytes)

63. Re: [Amps] Overdrive protection (score: 1)
Author: "Jerry Kaidor" <jerry@tr2.com>
Date: Fri, 27 Jul 2012 09:08:12 -0700 (PDT)
Back in the late 70's I had access to some very good test equipment - I was working as a bench tech in an instrument shop. I would bring in my ham rigs to play. On the spectrum analyzer I would see a
/archives//html/Amps/2012-07/msg00302.html (10,028 bytes)

64. Re: [Amps] Amplifying RF (score: 1)
Author: "Jerry Kaidor" <jerry@tr2.com>
Date: Sat, 28 Jul 2012 20:04:44 -0700 (PDT)
** How about a sheetmetal and cabinet only kit? IMHO that's the hard part. Then people just scrounge the parts as best they can. Probably skirts all FCC issues as well, because you're just selling p
/archives//html/Amps/2012-07/msg00351.html (9,164 bytes)

65. Re: [Amps] Dedicated RF (score: 1)
Author: "Jerry Kaidor" <jerry@tr2.com>
Date: Sun, 29 Jul 2012 13:44:45 -0700 (PDT)
A lot of new rugged devices have hit ** Indeed. I was quite excited by the new Freescale devices - they have a 1200W output one, protected up to 60-1 VSWR, and just $250 from Digikey! Each device has
/archives//html/Amps/2012-07/msg00358.html (8,199 bytes)

66. Re: [Amps] Dedicated RF (score: 1)
Author: "Jerry Kaidor" <jerry@tr2.com>
Date: Mon, 30 Jul 2012 13:36:39 -0700 (PDT)
** I think the extent of "support" for HF is that they do release parts with no built-in input matching. - Jerry Kaidor _______________________________________________ Amps mailing list Amps@contest
/archives//html/Amps/2012-07/msg00426.html (8,297 bytes)

67. Re: [Amps] Dedicated RF (score: 1)
Author: "Jerry Kaidor" <jerry@tr2.com>
Date: Tue, 31 Jul 2012 12:51:16 -0700 (PDT)
OK, My take on HF - it's unreliable. That's what makes it so much fun for hams. You never know what you'll get. Maybe a few scratchy signals from the next state, maybe a guy from South Africa booming
/archives//html/Amps/2012-07/msg00452.html (9,638 bytes)

68. Re: [Amps] 3CX1500A vs el cheapo GS-35B (score: 1)
Author: "Jerry Kaidor" <jerry@tr2.com>
Date: Thu, 2 Aug 2012 09:39:00 -0700 (PDT)
** My first guess is that those studies are grossly overpriced, like much in the medical world. So yeah, as long as they get away with it, timed replacement makes sense. - Jerry Kaidor, KF6VB ______
/archives//html/Amps/2012-08/msg00055.html (9,953 bytes)

69. Re: [Amps] 3CX1500A7 pulled from MRI (score: 1)
Author: "Jerry Kaidor" <jerry@tr2.com>
Date: Thu, 2 Aug 2012 18:18:53 -0700 (PDT)
** I wonder if any of it got shipped to the third world? I bet there are plenty of clinics out there that would *love* to have some old, obsolete, unreliable MRI machines.... - Jerry Kaidor, KF6VB _
/archives//html/Amps/2012-08/msg00061.html (7,788 bytes)

70. Re: [Amps] 8877 operation at 2KV anode voltage? (score: 1)
Author: "Jerry Kaidor" <jerry@tr2.com>
Date: Fri, 3 Aug 2012 09:52:26 -0700 (PDT)
** I have acquired some cheap 3CX400U7 tubes to retrofit my 78 on that dark day when the original tubes die. They are slightly larger in diameter than the original 3CX400A7's, but should still fit.
/archives//html/Amps/2012-08/msg00079.html (8,272 bytes)

71. Re: [Amps] non traditional linear (score: 1)
Author: "Jerry Kaidor" <jerry@tr2.com>
Date: Sun, 12 Aug 2012 14:51:20 -0700 (PDT)
** This is something I've been thinking about. There are some computer cases out there that have exquisite attention paid to cooling and quiet. I have an Antec 900 case which has IIRC 5 cooling fans
/archives//html/Amps/2012-08/msg00179.html (7,130 bytes)

72. Re: [Amps] Available Class A in Yaesu (score: 1)
Author: "Jerry Kaidor" <jerry@tr2.com>
Date: Sat, 18 Aug 2012 07:50:15 -0700 (PDT)
** How about this: The power input to the stage is the same with drive and without drive. But with drive, some of that power is coupled to the antenna. Without drive, ALL of it is dissipated by the
/archives//html/Amps/2012-08/msg00316.html (9,167 bytes)

73. Re: [Amps] $120 tube running a 1500 watt amplifier (score: 1)
Author: "Jerry Kaidor" <jerry@tr2.com>
Date: Mon, 20 Aug 2012 08:33:13 -0700 (PDT)
** In general, I understand that prices in Russia for *stuff* are about the same as here. Moscow is now known as the most expensive city in the world. I wonder exactly how big the surplus stock of t
/archives//html/Amps/2012-08/msg00341.html (10,080 bytes)

74. Re: [Amps] $120 tube running a 1500 watt amplifier (score: 1)
Author: "Jerry Kaidor" <jerry@tr2.com>
Date: Mon, 20 Aug 2012 09:14:25 -0700 (PDT)
** Really? In the heyday of WWII surplus, the shops on Cortland St in Manhattan were famous. And in LA, there is a "TRW swap meet" that is very active. In Moscow, there is the "radiorynok" ( Radio M
/archives//html/Amps/2012-08/msg00344.html (9,905 bytes)

75. Re: [Amps] Multi-Amp w/ Power Combiners (score: 1)
Author: "Jerry Kaidor" <jerry@tr2.com>
Date: Fri, 24 Aug 2012 09:57:24 -0700 (PDT)
** Well, they're both fed with the same signal. If they're the same sort of amp, tuned the same, the phase should be the same, right? - Jerry Kaidor, KF6VB __________________________________________
/archives//html/Amps/2012-08/msg00378.html (9,945 bytes)

76. Re: [Amps] Multi-Amp w/ Power Combiners (score: 1)
Author: "Jerry Kaidor" <jerry@tr2.com>
Date: Fri, 24 Aug 2012 10:49:49 -0700 (PDT)
Indeed. Honestly, it sounds impractical for other than a fixed-frequency application. - Jerry, KF6VB _______________________________________________ Amps mailing list Amps@contesting.com http://lists
/archives//html/Amps/2012-08/msg00382.html (9,415 bytes)

77. Re: [Amps] Multi-Amp w/ Power Combiners (score: 1)
Author: "Jerry Kaidor" <jerry@tr2.com>
Date: Fri, 24 Aug 2012 11:47:43 -0700 (PDT)
** The original question was about multiple *tube* amps. I've seen the solid state amps using combiners - I remember a QST article back in the 80's, when high power solid state was pretty exotic. Do
/archives//html/Amps/2012-08/msg00388.html (9,070 bytes)

78. Re: [Amps] Can some explain this curious eBay auction (score: 1)
Author: "Jerry Kaidor" <jerry@tr2.com>
Date: Fri, 24 Aug 2012 20:47:10 -0700 (PDT)
** Urk. A fool and his money.... Maybe I should sell some magic speaker cables on Ebay.... - Jerry Kaidor, KF6VB _______________________________________________ Amps mailing list Amps@contesting.com
/archives//html/Amps/2012-08/msg00396.html (8,829 bytes)

79. Re: [Amps] Alpha 78 (score: 1)
Author: "Jerry Kaidor" <jerry@tr2.com>
Date: Sun, 26 Aug 2012 10:22:35 -0700 (PDT)
I run my '78 (with the original tubes) on RTTY at about 500W. Even at that level, the air coming out of the chimney holes gets fairly warm. I haven't measured it yet. One of the main reasons I got it
/archives//html/Amps/2012-08/msg00441.html (8,186 bytes)

80. Re: [Amps] current threads about silver solder and resoldering (score: 1)
Author: "Jerry Kaidor" <jerry@tr2.com>
Date: Mon, 27 Aug 2012 18:49:54 -0700 (PDT)
** I had a friend who had worked as an assembly line worker in a company that made memory boards for satellites. He told me that NASA-spec soldering required that every solder joint glint the same w
/archives//html/Amps/2012-08/msg00491.html (8,206 bytes)

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