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1. [Amps] Speaking of PIN T/R switches (score: 1): Author: jkearman@att.net (Jim Kearman); Date: Mon, 06 Mar 2006 21:10:12 +0000; I have it in mind to build a 400-W MOSFET amp for 80-40 and would be interested in experimenting with PIN-diode T/R switching. I'm aware of the problems with high VSWR but I can deal with them. But I; /archives//html/Amps/2006-03/msg00130.html (6,836 bytes)
2. Re: [Amps] Speaking of PIN T/R switches (score: 1): Author: "Dr. David Kirkby" <david.kirkby@onetel.net>; Date: Mon, 06 Mar 2006 22:50:33 +0000; I'm not sure if you will be able to use PIN diodes at such a low frequency. The carrier lifetime may be too short. It is not a subject I know well, so stand to be corrected. _________________________; /archives//html/Amps/2006-03/msg00136.html (7,989 bytes)
3. Re: [Amps] Speaking of PIN T/R switches (score: 1): Author: "Dan Hearn" <dhearn@wwnw.net>; Date: Mon, 6 Mar 2006 15:58:18 -0800; Jim: About 10-12 years ago I had frequent contacts with K5CX now (SK) in Oklahoma, an excellent high speed CW operator. He had built a QSK system for a 3-1000Z linear using a power rectifier as a PIN; /archives//html/Amps/2006-03/msg00138.html (8,767 bytes)
4. Re: [Amps] Speaking of PIN T/R switches (score: 1): Author: "Dan Hearn" <dhearn@wwnw.net>; Date: Mon, 6 Mar 2006 17:44:27 -0800; My friend W6FR did a Google search for 6A6 and diode which turned up sources for the 6A6. It is 600v 6A rating and cost is very low. The info from K5CX showed it mounted on 2 standoffs with L bracket; /archives//html/Amps/2006-03/msg00151.html (9,642 bytes)
5. Re: [Amps] Speaking of PIN T/R switches (score: 1): Author: Peter Chadwick <g3rzp@g3rzp.wanadoo.co.uk>; Date: Tue, 7 Mar 2006 09:20:47 +0100 (CET); The main point about the PIN diode is that you need a long carrier life time - 5 to 10 microseconds is good for 160m and up. I STRONGLY recommend reading the application notes at Microsemi.com - that; /archives//html/Amps/2006-03/msg00162.html (8,708 bytes)

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