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Total 8 documents matching your query.

1. [Amps] What am I missing? (score: 1): Author: Pete Smith <n4zr@contesting.com>; Date: Fri, 12 Jan 2007 20:58:50 -0500; January QST has an article on old amplifiers that advocates replacing the input circuits on an SB-221 with simple parallel-tuned circuits for each band. How can these circuits possibly achieve matchi; /archives//html/Amps/2007-01/msg00105.html (7,206 bytes)
2. Re: [Amps] What am I missing? (score: 1): Author: "Tom W8JI" <w8ji@w8ji.com>; Date: Fri, 12 Jan 2007 21:26:28 -0500; They can't if the impedance of the tubes is anything other than 50 j something. A pair of 3-500's is fortunately close to 50 ohms with some reactance, so the parallel network will work if it is plac; /archives//html/Amps/2007-01/msg00107.html (7,493 bytes)
3. Re: [Amps] What am I missing? (score: 1): Author: "Phil Clements" <philc@texascellnet.com>; Date: Fri, 12 Jan 2007 20:49:41 -0600; Nothing new here; the Alpha 77DX and others, use simple L/C networks about 3 inches from the cathode. That is also 50 j something. The SX kit that adds a second 8877 includes a 2:1 un-un to make the; /archives//html/Amps/2007-01/msg00109.html (7,763 bytes)
4. Re: [Amps] What am I missing? (score: 1): Author: Bob and Bettina Groh <rgroh@swbell.net>; Date: Fri, 12 Jan 2007 21:41:47 -0600; My initial reaction was skepticism but the indicated input network is exactly what is indicated in the Eimac data sheet for the 3-500Z. Good pdf copy of the 3-500Z is on this web site: http://www.rad; /archives//html/Amps/2007-01/msg00112.html (8,657 bytes)
5. Re: [Amps] What am I missing? (score: 1): Author: Peter Chadwick <g3rzp@g3rzp.wanadoo.co.uk>; Date: Sat, 13 Jan 2007 06:56:29 +0100 (CET); I have the one that advcoates the strapping of grids. It's actually a reprint of a three part article that W6SAI did in Ham Radio magazine. 73 Peter G3RZP ____________________________________________; /archives//html/Amps/2007-01/msg00114.html (7,320 bytes)
6. Re: [Amps] What am I missing? (score: 1): Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>; Date: Sat, 13 Jan 2007 06:05:50 +0000; There are a few Eimac Application Bulletins on the web, at: http://www.cpii.com/eimac/eiapps.htm along with other useful information and a limited FAQ. * AB5 - Eimac Tube Performance Computer * AB16; /archives//html/Amps/2007-01/msg00115.html (8,510 bytes)
7. Re: [Amps] What am I missing? (score: 1): Author: Bob and Bettina Groh <rgroh@swbell.net>; Date: Sat, 13 Jan 2007 09:32:57 -0600; Peter, I would love to have a reprint or pdf file of that article! 73 Bob, WA2CKY _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mai; /archives//html/Amps/2007-01/msg00124.html (8,031 bytes)
8. Re: [Amps] What am I missing? (score: 1): Author: Peter Chadwick <g3rzp@g3rzp.wanadoo.co.uk>; Date: Sat, 13 Jan 2007 20:59:30 +0100 (CET); IF you chase me next month (after I'm back from a business trip to the US and the XYL is back from her business trip to the US - she's in Portland Or at the moment ), I'll dig it out and get her to s; /archives//html/Amps/2007-01/msg00127.html (7,996 bytes)

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