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1. Re: [Amps] suppliers (score: 1)
Author: George <k4gvt@comcast.net>
Date: Fri, 22 Jun 2007 16:53:57 -0400
I'm not sure what problem your having with Digikey, could you explain. I use Digikey, Mouser, Newark Electronics and Allied Electronics. Each supplier has their strength as well as there weaknesses.
/archives//html/Amps/2007-06/msg00116.html (7,574 bytes)

2. Re: [Amps] AL-80A HV Glitch (score: 1)
Author: George <k4gvt@comcast.net>
Date: Thu, 10 Apr 2008 14:48:10 -0400
Hello Mark, I have an ALS1500, and had a similar problem. Found the screws holding the HV filter board had become loose during shipping. This was not a problem until after several weeks of use. Once
/archives//html/Amps/2008-04/msg00152.html (8,561 bytes)

3. Re: [Amps] B minus connection (score: 1)
Author: George <k4gvt@comcast.net>
Date: Fri, 11 Apr 2008 09:40:16 -0400
The integrity of the HV return path is imperative to operation and most importantly safety! Should you allow the HV return path to be disrupted (disconnected) while the HV path remains on, the potent
/archives//html/Amps/2008-04/msg00167.html (7,578 bytes)

4. Re: [Amps] Marshall 811A's and message from RF Parts (score: 1)
Author: George <k4gvt@comcast.net>
Date: Tue, 15 Apr 2008 15:56:54 -0400
There once was a Marshall Electronics (not the sound people) electronics distributor in Long Island, NY The competed with Arrow, Hamilton Avnet, Summit, and other distributors. I don't know if they a
/archives//html/Amps/2008-04/msg00197.html (9,153 bytes)

5. Re: [Amps] interesting piece of kit..... (score: 1)
Author: george <k4gvt@comcast.net>
Date: Thu, 08 Jan 2009 11:50:14 -0500
Dave, these "RF generators are used for ISM (Industrial Scientific Medical) use. One of the most common frequencies for this purpose is 13.56MHz. When in services such as semiconductor manufacturing
/archives//html/Amps/2009-01/msg00062.html (8,805 bytes)

6. Re: [Amps] Nichrome wire for suppressors (score: 1)
Author: George <K4GVT@comcast.net>
Date: Wed, 11 Feb 2009 11:59:02 -0500
As much as I disagree with it's use for this application, a good source for all types of materials including nichrome wire is http://www.mcmaster.com/#nickel-chromium-(nichrome)-wire/=k2lpg 73, Georg
/archives//html/Amps/2009-02/msg00315.html (8,996 bytes)

7. Re: [Amps] Advanced Radio Devices Model 230C (score: 1)
Author: George <K4GVT@comcast.net>
Date: Thu, 05 Mar 2009 18:11:30 -0500
Mike, I have one--works great. I'm in the process of making a website dedicated to this amp with a PDF of the manual. I had to fix mine and got to know it well. I also took the EPROM and made saved a
/archives//html/Amps/2009-03/msg00189.html (9,568 bytes)

8. Re: [Amps] Advanced Radio Devices Model 230C (score: 1)
Author: George <K4GVT@comcast.net>
Date: Fri, 06 Mar 2009 06:45:10 -0500
Jim, I'm wondering what kind of problems your having. After I corrected the circuit board land brakes around the switchover relay and the I/O connector on the console, the unit works flawlessly. Also
/archives//html/Amps/2009-03/msg00205.html (10,862 bytes)

9. Re: [Amps] Advanced Radio Devices Model 230C (score: 1)
Author: George <K4GVT@comcast.net>
Date: Fri, 06 Mar 2009 11:02:44 -0500
Thanks Jim, So far this one has been great. The initial issues (broken PCB connections) were resolved and it's been working great. The firmware failsafe(s) seen very conservative, but that's ok if th
/archives//html/Amps/2009-03/msg00208.html (13,489 bytes)

10. [Amps] Turns limit device (score: 1)
Author: George <K4GVT@comcast.net>
Date: Thu, 12 Mar 2009 09:57:07 -0400
Folks, I'm trying to identify the actual name for the device pictured, link below. http://www.k4gvt.com/turns_limit.jpg These progressive cams are used to create a hard multi turn stop or mechanical
/archives//html/Amps/2009-03/msg00342.html (7,420 bytes)

11. Re: [Amps] Turns limit device (score: 1)
Author: George <K4GVT@comcast.net>
Date: Fri, 13 Mar 2009 10:37:16 -0400
Thanks for your responses. I found the following patent using the same turns limit method, interesting use. However, the date of this patent is 1970, filed 1967. Friends tell me this method was use i
/archives//html/Amps/2009-03/msg00376.html (8,150 bytes)

12. Re: [Amps] M57762 multiple hybrids for 1296 MHz? (score: 1)
Author: George <K4GVT@comcast.net>
Date: Wed, 18 Mar 2009 07:33:07 -0400
Hello Petter, the easiest way is to use Wireline to create two (one for input, one for output) 180 degree phase shift transformers. This is what is done in the DEMI 1296 amplifiers. the links below a
/archives//html/Amps/2009-03/msg00481.html (8,244 bytes)

13. Re: [Amps] Conservation of Energy! (score: 1)
Author: George <K4GVT@comcast.net>
Date: Sun, 06 Dec 2009 09:17:37 -0500
WATTS did he say :-) Truly a grim reality showing a lack of technical ability in a hobby that is based on being technically astute! I hope they never open their amp's. 73, George K4GVT ______________
/archives//html/Amps/2009-12/msg00155.html (7,799 bytes)

14. Re: [Amps] Need help with ARD 230A (score: 1)
Author: George <K4GVT@comcast.net>
Date: Wed, 20 Jan 2010 12:49:25 -0500
Hello Leslie, I have one working very well after much repair on the circuit boards. It seems the boards were designed the traces way too narrow and due to vibration and other mechanical issues brake.
/archives//html/Amps/2010-01/msg00264.html (8,796 bytes)

15. Re: [Amps] 3CX800 Amplifier Pictures (score: 1)
Author: George <K4GVT@comcast.net>
Date: Sun, 09 May 2010 19:08:51 -0400
Nice build, well done Jim. It's clear to see you put a lot of thought and time on this project. I'm sure it works as well as it looks. 73, George, K4GVT ______________________________________________
/archives//html/Amps/2010-05/msg00125.html (7,838 bytes)

16. Re: [Amps] Labeling panels (score: 1)
Author: George <K4GVT@comcast.net>
Date: Thu, 19 Aug 2010 08:37:50 -0400
Datak dry transfer decals can give your project a very professional look. They have all kinds of dry transfer including lettering, numbers, scales, and bar graphs. Once applied the lettering you need
/archives//html/Amps/2010-08/msg00319.html (8,684 bytes)

17. [Amps] Transformer question (score: 1)
Author: George <K4GVT@comcast.net>
Date: Fri, 26 Nov 2010 15:33:12 -0500
Greetings, I have a high voltage transformer with the following information on it: PT-1260 HTS-9286 9960805 It was used in an home brew amp that has been cannibalized. I'm trying to identify the sour
/archives//html/Amps/2010-11/msg00490.html (10,269 bytes)

18. [Amps] Transformer help please (score: 1)
Author: George <K4GVT@comcast.net>
Date: Mon, 29 Nov 2010 11:17:36 -0500
Greetings, I have a high voltage transformer with the following information on it: PT-1260 HTS-9286 9960805 This was used in an home brew amp that has been cannibalized. I'm trying to identify the tr
/archives//html/Amps/2010-11/msg00543.html (8,072 bytes)

19. Re: [Amps] Airflow meter (score: 1)
Author: George <K4GVT@comcast.net>
Date: Fri, 15 Apr 2011 10:39:21 -0400
This method is called a Hot-wire manometer, more airflow equals less heat transfer between a heat source and a thermal sensor (Thermocouple, Thermistor..). A similar method is also commonly used in h
/archives//html/Amps/2011-04/msg00441.html (12,194 bytes)

20. Re: [Amps] Teflon Chimneys (score: 1)
Author: George <K4GVT@comcast.net>
Date: Sat, 14 May 2011 09:04:27 -0400
Bob, take a look at the link below, they have all kinds of plastic rivets, they work very well. http://www.itw-fastex.com/catalog/index.php/dw/op/a/6/c/14/p/27?m=no http://www.itw-fastex.com/rivets.h
/archives//html/Amps/2011-05/msg00099.html (8,511 bytes)

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