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References: [ +from:harryhbrown@earthlink.net: 17 ]

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1. [Amps] Design around an 8938 for 432MHz, circa 1980? (score: 1): Author: harryhbrown@earthlink.net (Harry Brown); Date: Sun, 21 Jul 2002 12:10:01 -0400; The amplifier was also in the 22nd edition of Bill Orr's Radio Handbook. It's on pages 22.125 thru 22.132. 73, Harry, W3IIT Visit the Mt. Airy VHF Radio Club at: <http://www.ij.net/packrats/>http://w; /archives//html/Amps/2002-07/msg00380.html (8,686 bytes)
2. [AMPS] smith chart calculations (score: 1): Author: harryhbrown@earthlink.net (Harry Brown); Date: Sun, 09 Dec 2001 17:57:18 -0500; Jerry, Check out the following web site: http://www.sss-mag.com/smith.html Under Smith Chart tools, check the first one by Motorola. It's very easy to use. Lots of other info on the page too. 73, Har; /archives//html/Amps/2001-12/msg00188.html (7,763 bytes)
3. [AMPS] Transformer Current ratings (score: 1): Author: harryhbrown@earthlink.net (Harry Brown); Date: Sat, 15 Dec 2001 22:53:15 -0500; The article on switching HV power supplies was in the Feb. 91 issue of QEX. It should be available on the QEX CD. The article included a complete schematic, parts list, one photo and several block di; /archives//html/Amps/2001-12/msg00254.html (12,033 bytes)
4. [AMPS] SB 220 on 6 meter (score: 1): Author: harryhbrown@earthlink.net (Harry Brown); Date: Tue, 01 May 2001 22:40:10 -0400; Check out the following page: http://www.agate.net/~ns1z/sb220.html Looks pretty complete to me. Has lots of photos. 73, Harry, W3IIT -- At 12:47 PM 5/1/2001 -0700, Willem Angenent wrote: <center>Vis; /archives//html/Amps/2001-05/msg00018.html (8,495 bytes)
5. Re: [Amps] Hembrew amps 2x4cx250 on 50Mhz (score: 1): Author: Harry Brown <harryhbrown@earthlink.net>; Date: Sat, 17 Apr 2004 13:22:05 -0400; Manuel, Ham Radio Magazine had an article on a two tube 4CX250 series of tube amplifier by Fred Merry. I can't remember the date of the article but it is available from CQ Magazine on a CD. I'm not a; /archives//html/Amps/2004-04/msg00107.html (8,569 bytes)
6. [Amps] HV Switching Power Supply (score: 1): Author: Harry Brown <harryhbrown@earthlink.net>; Date: Fri, 21 May 2004 10:40:54 -0400; FYI At Dayton, I saw a booth called of a company called "The RF Shop". The guy running it had a switching HV power supply displayed. The electronics board was under a thick aluminum cover so you coul; /archives//html/Amps/2004-05/msg00187.html (7,523 bytes)
7. Re: [Amps] Recommend supplier for aluminum sheet? (score: 1): Author: Harry Brown <harryhbrown@earthlink.net>; Date: Mon, 13 Sep 2004 10:08:48 -0400; Bill, The guy at Daytona is likely Charles Byers, K3IWK. He sells antennas and aluminum boxes. He does have a web site but I don;t have it available. His e mail address is: k3iwk@flash.net I think he; /archives//html/Amps/2004-09/msg00246.html (9,885 bytes)
8. Re: [Amps] HV Switch Mode Power Supplies (score: 1): Author: Harry Brown <harryhbrown@earthlink.net>; Date: Sat, 25 Jun 2005 07:34:30 -0400; Here's some more info on a "real" application of the Watts Unlimited power supply. At the VHF Dinner at Dayton this year, K5AND gave a talk on a 6 Meter amp he designed using an 8877 for DXpedition p; /archives//html/Amps/2005-06/msg00227.html (12,540 bytes)
9. Re: [Amps] 220MHz amp info (score: 1): Author: Harry Brown <harryhbrown@earthlink.net>; Date: Sat, 08 Oct 2005 15:48:11 -0400; The 222 MHz amp article is also on pages 12-17 of the June 1980 issue of ham radio magazine. 73, Harry, W3IIT At 12:29 AM 10/8/2005 +0000, N7KA@comcast.net wrote: The 23rd Edition of the Radio Handbo; /archives//html/Amps/2005-10/msg00186.html (8,419 bytes)
10. [Amps] Hipot tester Info Needed (score: 1): Author: Harry Brown <harryhbrown@earthlink.net>; Date: Sun, 12 Feb 2006 13:52:25 -0500; I was at the Orlando hamfest yesterday and picked up an Associated Research Model 4045 AC/DC Hypot Junior. It appears to be in good condition although I have not powered it up. The data that came wit; /archives//html/Amps/2006-02/msg00230.html (7,429 bytes)
11. [Amps] Fw: [Packrats] cool old technology (score: 1): Author: "Harry Brown" <harryhbrown@earthlink.net>; Date: Sat, 23 Dec 2006 12:58:01 -0500; You might find the video interesting. They show making of a triode based on the patent. Who all home-brews their tubes now? I remember 30 years or so ago that some did. 73, Harry, W3IIT The making of; /archives//html/Amps/2006-12/msg00206.html (7,098 bytes)
12. Re: [Amps] 2 meter 8877/3cx1500A7 (score: 1): Author: "Harry Brown" <harryhbrown@earthlink.net>; Date: Mon, 29 Jan 2007 17:01:07 -0500; Bruce, You can find the original article on W6PO's 8877 144 MHz amplifier at W5UN's web page at http://web.wt.net/~w5un/8877-1.htm 73, Harry, W3IIT Hello: Anyone Have a schmetic and plans for an 8877; /archives//html/Amps/2007-01/msg00328.html (8,649 bytes)
13. Re: [Amps] RE : amp hardware (score: 1): Author: "Harry Brown" <harryhbrown@earthlink.net>; Date: Tue, 10 Apr 2007 18:26:15 -0400; Harbor Freight has the hand tool and the pressnuts. Has anyone tried them? _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/li; /archives//html/Amps/2007-04/msg00072.html (9,918 bytes)
14. Re: [Amps] switching power supply for tube amplifier (score: 1): Author: "Harry Brown" <harryhbrown@earthlink.net>; Date: Fri, 14 Sep 2007 15:55:39 -0400; Alex, A light weight single band amp has already been done. Check the Jan/Feb 2006 issue of QEX on page 41, Dick, K5AND, describes a 6 meter, 8877 amp that he developed that uses an existing commerci; /archives//html/Amps/2007-09/msg00153.html (9,868 bytes)
15. Re: [Amps] Low Pass Filter (score: 1): Author: "Harry Brown" <harryhbrown@earthlink.net>; Date: Thu, 27 Sep 2007 23:00:34 -0400; Barrie There's a substantially looking filter by K8CU at http://www.nd2x.net/k8cu-lpf.html' It is a band pass filter covering the low bands thru 54 MHz. It is part of an amp for 6M using a GS35B. 73,; /archives//html/Amps/2007-09/msg00443.html (7,927 bytes)
16. [Amps] SB-230 Amp Retrofit (score: 1): Author: "Harry Brown" <harryhbrown@earthlink.net>; Date: Fri, 12 Oct 2007 13:54:44 -0400; I got a SB-230 Amp at a local hamfest with a bad 8873. I'd like to replace the 8873 with something affordable. Can someone point me to a conversion article on the 230 that uses an air cooled tube? 73; /archives//html/Amps/2007-10/msg00161.html (6,347 bytes)
17. Re: [Amps] gs35b tube (score: 1): Author: "Harry Brown" <harryhbrown@earthlink.net>; Date: Sun, 13 Apr 2008 14:27:24 -0400; Check http://www.realhamradio.com/GS35B_Amp_Page.htm There was a write-up in the June 2002 issue of QST by K8CU. There's a lot more info in the web page. 73, Harry, W3IIT == -- Original Message -- Fr; /archives//html/Amps/2008-04/msg00186.html (8,098 bytes)

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