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1. [Amps] Why do people post to individual and AMPS ? (score: 1): Author: w5lu@hotmail.com (S. J. Blackwell); Date: Fri, 25 Oct 2002 16:07:14 +0000; Freud, like Marx, were both interesting. The fact that they were both wrong seems not to bother many in academia; however most, but not all, seem to agree about Hitler. Best wishes, Sam, W5LU _______; /archives//html/Amps/2002-10/msg00267.html (8,465 bytes)
2. [Amps] BTI BANDSWITCH (score: 1): Author: w5lu@hotmail.com (S. J. Blackwell); Date: Mon, 23 Sep 2002 23:11:24 +0000; To: <amps@contesting.com> *I once had a BTI amp many years ago. It was a floor stander. (LK-2000?) My memory is a little weak, but I believe it used an Ohmite power switch for the Pi net BS. They ar; /archives//html/Amps/2002-09/msg00215.html (7,444 bytes)
3. [Amps] ALPHA 77 SX UPDATE (score: 1): Author: w5lu@hotmail.com (S. J. Blackwell); Date: Wed, 21 Aug 2002 13:46:23 +0000; Glad to see the recommendation for the clamping diode to ground on the choke. Without this, the path to ground is through the filament winding on the transformer. In the Alpha amps this may cost more; /archives//html/Amps/2002-08/msg00178.html (8,867 bytes)
4. [Amps] al-1500 parasitic?? or some other problem? (score: 1): Author: w5lu@hotmail.com (S. J. Blackwell); Date: Tue, 14 May 2002 23:13:47 +0000; It would now appear that you have narrowed the problem quite nicely. The only thing common to all of the permutations you have described is the antenna system. From the connector at the shack to the; /archives//html/Amps/2002-05/msg00205.html (8,678 bytes)
5. [Amps] CB and 10 meter amps (score: 1): Author: w5lu@hotmail.com (S. J. Blackwell); Date: Thu, 11 Apr 2002 01:47:24 +0000; I have had a problem with the type accepting, ban possible use by CBers tack that the gov took some years ago when they took the 11M band from the hams. A ham should be able to make the amp work pro; /archives//html/Amps/2002-04/msg00299.html (7,456 bytes)
6. [AMPS] YC-179 Anyone (score: 1): Author: w5lu@hotmail.com (S. J. Blackwell); Date: Thu, 10 Jan 2002 03:12:24 +0000; Check www.WA8WZG.com. He has them for sale. Indicates they are updated version of the 3CPX5000. 73, Sam To: <amps@contesting.com> _________________________________________________________________ MSN; /archives//html/Amps/2002-01/msg00080.html (7,339 bytes)
7. [AMPS] New to list. (score: 1): Author: w5lu@hotmail.com (S. J. Blackwell); Date: Tue, 15 Jan 2002 17:20:24 +0000; Ron, It is known that many pushpull transistor amps of the type in the Motorola app notes designed by Helge Grenberg will oscillate with low pass filters on both the input and output. The input low p; /archives//html/Amps/2002-01/msg00104.html (9,259 bytes)
8. [AMPS] New to list (score: 1): Author: w5lu@hotmail.com (S. J. Blackwell); Date: Tue, 15 Jan 2002 18:01:29 +0000; Helge Granberg did not need me to incorrectly spell his name. He was a gentleman and always had time to spend with a ham(me) on the phone talking about his designs. Sam, W5LU ________________________; /archives//html/Amps/2002-01/msg00105.html (6,577 bytes)
9. [AMPS] Input matching experiment (score: 1): Author: w5lu@hotmail.com (S. J. Blackwell); Date: Fri, 18 Jan 2002 17:07:51 +0000; Jim, Please set the 812A GG amp with the broad band untuned input to operate on the 220MHz band. Good luck, Sam, W5LU To: <amps@contesting.com> _______________________________________________________; /archives//html/Amps/2002-01/msg00126.html (10,091 bytes)
10. [Amps] HN connectors (score: 1): Author: "S. J. Blackwell" <w5lu@hotmail.com>; Date: Sun, 28 Sep 2003 16:54:01 +0000; Good morning, Does anyone have experience or advice in using HN connectors for HV in PS on the floor to amp on the table via coax (RG214?)? Amphenol says they are good for 5 KV. Thanks, Sam, W5LU ___; /archives//html/Amps/2003-09/msg00201.html (6,912 bytes)
11. Re: [Amps] 2 x 8877 (score: 1): Author: "S. J. Blackwell" <w5lu@hotmail.com>; Date: Mon, 01 Mar 2004 15:55:09 +0000; Steve, I had such an amp in the 1950's complete with window. It had a square cut out with glass. Beneath the glass was a layer of copper screen material for TVI suppression. The amount of VHF radiati; /archives//html/Amps/2004-03/msg00006.html (8,133 bytes)
12. Re: [Amps] Electrical shock testson humans = 'from drooling,to urination, to... (score: 1): Author: "S. J. Blackwell" <w5lu@hotmail.com>; Date: Sun, 21 Nov 2004 17:15:39 -0600; Defibrillators were not available generally in institutions until the 1960's . True CPR did not come into being until after faith was established in defibrillators. The doctors could only have pronou; /archives//html/Amps/2004-11/msg00357.html (8,228 bytes)
13. Re: [Amps] New FET's (score: 1): Author: "S. J. Blackwell" <w5lu@hotmail.com>; Date: Wed, 09 Feb 2005 23:48:14 -0600; Will, If you were upside down at 45,000 ft doing Mach 1.2 in an F-16 getting ready to split-S with a SAM on your tail or in a vacuum in outer space, would you rather have a $0.29 cent 2N2222 in your; /archives//html/Amps/2005-02/msg00380.html (8,227 bytes)
14. Re: [Amps] Solid State HF High power linear amps (score: 1): Author: "S. J. Blackwell" <w5lu@hotmail.com>; Date: Mon, 28 Mar 2005 21:22:36 -0600; Not so. The filters are for harmonic control. My 1KW MRF150 amp (2ea 4x150 amps in PP parallel with combiners beats the socks off all of the standard ham xcvrs except some that operate the outputs c; /archives//html/Amps/2005-03/msg00653.html (8,316 bytes)
15. Re: [Amps] Solid State HF High power linear amps (score: 1): Author: "S. J. Blackwell" <w5lu@hotmail.com>; Date: Tue, 29 Mar 2005 02:37:41 -0600; That is spot on. Sam, W5LU _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2005-03/msg00667.html (8,537 bytes)
16. Re: [Amps] Heathkit HA-14 filaments (score: 1): Author: "S. J. Blackwell" <w5lu@hotmail.com>; Date: Wed, 01 Jun 2005 17:42:36 -0500; The HA-14 was designed for mobile operation-- the reason for the series 6.3 V fils. 73, Sam _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesti; /archives//html/Amps/2005-06/msg00003.html (6,435 bytes)
17. Re: [Amps] Transformer core shorted to secondary winding?? (score: 1): Author: "S. J. Blackwell" <w5lu@hotmail.com>; Date: Sat, 23 Jul 2005 20:32:37 -0500; Bill, Before going off on this transformer, look at my off list message. You are most likely measuring capacitively coupled volts with a high impedence volt meter. Ground the CT and remeasure you sho; /archives//html/Amps/2005-07/msg00288.html (9,838 bytes)
18. Re: [Amps] Transformer core shorted to secondary winding?? (score: 1): Author: "S. J. Blackwell" <w5lu@hotmail.com>; Date: Sat, 23 Jul 2005 21:13:13 -0500; No. As one goes out from the core the capacity to the core goes down. He should ground the CT and recheck. He was measuring between the floating secondary and the chassis. 73, Sam, W5LU _____________; /archives//html/Amps/2005-07/msg00290.html (9,876 bytes)
19. Re: [Amps] Transformer core shorted to secondary winding?? (score: 1): Author: "S. J. Blackwell" <w5lu@hotmail.com>; Date: Sun, 24 Jul 2005 08:08:46 -0500; OK, now why the low DC volts? Let us assume that for some reason you have developed a situation where you are now half wave rectifying instead of FWCT rectifying. This could explain the 900 volts an; /archives//html/Amps/2005-07/msg00295.html (11,218 bytes)
20. Re: [Amps] Transformer core shorted to secondary winding?? (score: 1): Author: "S. J. Blackwell" <w5lu@hotmail.com>; Date: Sun, 24 Jul 2005 08:58:10 -0500; Good. We are half wave rectifying. Why? We know this thing worked for about a quarter century, so we don't need to re-engineer it. Simple things first: We know which leg of the FWCT is not working.; /archives//html/Amps/2005-07/msg00299.html (10,333 bytes)

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