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Total 95 documents matching your query.

81. [Amps] Gauging interest: group buy for 2010 ARRL Handbook 250W PA (score: 1)
Author: Brian Machesney <nekvtster@gmail.com>
Date: Sat, 19 Dec 2009 23:48:18 -0500
I would like to build two of the amps described in chapter 17 of the 2010 Handbook. To get the cost down, I would like to do a "group buy" of parts. I have already begun inquiring with FAR Circuits r
/archives//html/Amps/2009-12/msg00505.html (7,226 bytes)

82. [Amps] Alpha 87a - Internal Fan Motor/Blower (score: 1)
Author: Brian Moran <brianmo@yahoo.com>
Date: Tue, 20 Dec 2011 21:45:54 -0800 (PST)
The internal squirrel cage fan motor in my Alpha 87a went from not noisy to 'noisy' to 'not moving - humming really LOUDLY' in about a week. Has anyone replaced just the motor portion with something
/archives//html/Amps/2011-12/msg00169.html (7,511 bytes)

83. [Amps] Alpha 87a Blower repair/replacement - done! (score: 1)
Author: Brian Moran <brianmo@yahoo.com>
Date: Sun, 25 Dec 2011 17:36:32 -0800 (PST)
After posting my query on this list about the motor for the 87a blower, I received a number of email messages of encouragement, to try to repair the blower that I had... I also called RF Concepts on
/archives//html/Amps/2011-12/msg00217.html (12,479 bytes)

84. [Amps] Transformer: CML 8-5144 - specs? (score: 1)
Author: Brian Moran <brianmo@yahoo.com>
Date: Mon, 26 Dec 2011 16:09:47 -0800 (PST)
I am getting into a restoration of a homebrew 4-1000 amplifier, and the plate transformer is marked CML 8-5144; does anyone know of what its specs may be be? It's in a sealed cube, and very heavy, dr
/archives//html/Amps/2011-12/msg00221.html (7,326 bytes)

85. [Amps] AL-1200 plate circuit conductor source/substitute? (score: 1)
Author: Brian Moran <brianmo@yahoo.com>
Date: Thu, 11 Oct 2012 08:26:49 -0700 (PDT)
Hi folks! My AL-1200 converted to gs35b amp had a failure recently on 10m; I don't know the exact details since someone else was using it on 10m, but after inspection, it appears that the plate choke
/archives//html/Amps/2012-10/msg00072.html (8,155 bytes)

86. [Amps] AL1200 follow-up (score: 1)
Author: Brian Moran <brianmo@yahoo.com>
Date: Fri, 12 Oct 2012 10:55:47 -0700 (PDT)
Thanks to all those that responded via the list or privately: Although not listed in the parts section of MFJ's PDF catalog (well, I couldn't find it), an email to MFJ customer service yielded a spee
/archives//html/Amps/2012-10/msg00081.html (7,896 bytes)

87. [Amps] Command Technologies HF2500 (score: 1)
Author: "Brian Sarkisian, KG8CO" <cqkg8co@yahoo.com>
Date: Sun, 24 Nov 2013 15:37:35 -0800 (PST)
I recently picked up an Command Technologies HF-2500.  It is model number 222 so it been around for a while. I have a few questions concerning the amp. 1.  I have seen a couple HF-2500 users guides.
/archives//html/Amps/2013-11/msg00415.html (7,843 bytes)

88. [Amps] Command Technologies HF-2500 (score: 1)
Author: "Brian Sarkisian, KG8CO" <cqkg8co@yahoo.com>
Date: Tue, 26 Nov 2013 08:56:59 -0800 (PST)
I recently picked up an Command Technologies HF-2500.  It is model number 222 so it been around for a while. I have a few questions concerning the amp. 1.  I have seen a couple HF-2500 users guides.
/archives//html/Amps/2013-11/msg00424.html (7,522 bytes)

89. Re: [Amps] Solid state relays..again (score: 1)
Author: Brian Carling <bcarling@cfl.rr.com>
Date: Thu, 13 Feb 2014 10:16:48 -0500
The little black varistor thingies work quite nicely for eliminating that "THUMMMPP!" in small to medium-size equipment. I don't really know what they are but somebody gave me a whole bunch of them a
/archives//html/Amps/2014-02/msg00110.html (10,187 bytes)

90. Re: [Amps] A Professionally Built Amplifier Claim (score: 1)
Author: Brian Carling <bcarling@cfl.rr.com>
Date: Sun, 16 Feb 2014 10:42:30 -0500
Looks like FCC is too busy to care. Best regards - Bry Carling _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2014-02/msg00148.html (8,531 bytes)

91. Re: [Amps] QRO operation into a 80 meter vertical (score: 1)
Author: Brian Carling <bcarling@cfl.rr.com>
Date: Thu, 20 Feb 2014 20:31:34 -0500
Don may I recommend shunt feeding your tower? Best regards - Bry Carling _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/list
/archives//html/Amps/2014-02/msg00196.html (8,784 bytes)

92. Re: [Amps] More on server supplies (score: 1)
Author: Brian Carling <bcarling@cfl.rr.com>
Date: Fri, 21 Feb 2014 21:23:56 -0500
Does anyone need a transformer for a linear amp supply? I have one that will deliver 50v AC at lots of amperes... It will be inexpensive if someone needs it... Brian Carling AF4K Best regards - Bry C
/archives//html/Amps/2014-02/msg00211.html (8,542 bytes)

93. Re: [Amps] Working on my Darwin award (score: 1)
Author: Brian Carling <bcarling@cfl.rr.com>
Date: Thu, 27 Feb 2014 07:38:52 -0500
This sounds like a nightmare, worse than taking antenna rotators apart! Best regards - Bry Carling, AF4K g force. At that point, kaboom! You get the parts flying all through the room, maybe all the w
/archives//html/Amps/2014-02/msg00264.html (11,507 bytes)

94. [Amps] Switching HVPS cores / Class E amp power supply ferrites (score: 1)
Author: Brian Moran <brianmo@yahoo.com>
Date: Sun, 13 Apr 2014 17:29:58 -0700 (PDT)
I have the following cores for HV switching power supply experimentation - (these are PC mount) OR-44444-EC ETD44  20 halves / 10 complete halves OR-44949-EC ETD49  20 halves / 10 complete halves Wit
/archives//html/Amps/2014-04/msg00141.html (7,528 bytes)

95. [Amps] dedicatedrf.com amps (score: 1)
Author: Brian KA9EGW <ka9egw@ka9egw.com>
Date: Thu, 25 Feb 2016 23:58:43 -0600
For $7k I can build a one-off no-tune amp with device dissipation > power out and scary-low IMD...how about a 4cw5000 and no grid current. How many extra dB in the antenna farm will $7k buy? 73, Bria
/archives//html/Amps/2016-02/msg00063.html (21,662 bytes)

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