- 1. [Amps] GU-84B Conversion (score: 1)
- Author: Bill Smith <ko4nrbs@yahoo.com>
- Date: Tue, 12 Apr 2011 17:47:25 -0700 (PDT)
- I'm considering converting my old Swan Mark 1 (two 3-400Z tubes) to use one GU-84B. Some time ago I replaced the panel bandswitch in the Swan with a Radio Switch Model 86 six position switch with two
- /archives//html/Amps/2011-04/msg00340.html (7,316 bytes)
- 2. Re: [Amps] GU-84B Conversion (score: 1)
- Author: "Carl" <km1h@jeremy.mv.com>
- Date: Tue, 12 Apr 2011 21:37:39 -0400
- Why? No room for 3-500Z's or 4-400's? Carl KM1H _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
- /archives//html/Amps/2011-04/msg00341.html (8,485 bytes)
- 3. Re: [Amps] GU-84B Conversion (score: 1)
- Author: gdaught6@stanford.edu
- Date: Tue, 12 Apr 2011 19:03:34 -0700
- Carl and Bill wrote... I've got a nice pair of used but tested good 3-400Z's I'll part with. Make an offer. 73, George T Daughters, K6GT CU in the California QSO Party (CQP) October 1-2, 2011 _______
- /archives//html/Amps/2011-04/msg00342.html (7,447 bytes)
- 4. Re: [Amps] GU-84B Conversion (score: 1)
- Author: "Roger (sub1)" <sub1@rogerhalstead.com>
- Date: Tue, 12 Apr 2011 23:02:52 -0400
- Needs the room for the HV transformer and screen supply? The GU84B is a Tetrode while the Swan is designed around a pair of Triodes. It Is relatively expensive tube even as NOS, sockets run around $1
- /archives//html/Amps/2011-04/msg00344.html (13,171 bytes)
- 5. Re: [Amps] GU-84B Conversion (score: 1)
- Author: "Jeff Blaine" <keepwalking188@yahoo.com>
- Date: Tue, 12 Apr 2011 22:09:49 -0500
- GI7B? 73, Jeff ACØC www.ac0c.com Needs the room for the HV transformer and screen supply? The GU84B is a Tetrode while the Swan is designed around a pair of Triodes. It Is relatively expensive tube e
- /archives//html/Amps/2011-04/msg00345.html (13,742 bytes)
- 6. Re: [Amps] GU-84B Conversion (score: 1)
- Author: "Roger (sub1)" <sub1@rogerhalstead.com>
- Date: Tue, 12 Apr 2011 23:51:55 -0400
- GI46 would be another choice with a higher plate dissipation rating. I've wanted to build up a pair of those, but I have far too many projects already under way and too many things that need fixing.
- /archives//html/Amps/2011-04/msg00349.html (15,229 bytes)
- 7. Re: [Amps] GU-84B Conversion (score: 1)
- Author: "Jeff Blaine" <keepwalking188@yahoo.com>
- Date: Tue, 12 Apr 2011 22:59:39 -0500
- Yes, pair. But given 3500z is so easy to get, reliable and cheap, that seems the best way to go unless a guy is just dedicated to go ceramic. The GI46 is a bigger physical tube but it has the same Pd
- /archives//html/Amps/2011-04/msg00350.html (17,257 bytes)
- 8. Re: [Amps] GU-84B Conversion (score: 1)
- Author: Glen Zook <gzook@yahoo.com>
- Date: Tue, 12 Apr 2011 21:32:47 -0700 (PDT)
- The GS-31b has a plate dissipation of 1000 watts, is a triode, and various sellers are selling them for like $48 plus $35 shipping. Glen, K9STH Website: http://k9sth.com GI7B? _______________________
- /archives//html/Amps/2011-04/msg00352.html (8,056 bytes)
- 9. Re: [Amps] GU-84B Conversion (score: 1)
- Author: Richard Solomon <dickw1ksz@gmail.com>
- Date: Tue, 12 Apr 2011 21:40:41 -0700
- I thought the 3-500, being somewhat taller than the 3-400, would not fit in the Swan, unless you fab a new cover or drop the sockets, which will entail cooling issues. The GS-31B sounds like a fair c
- /archives//html/Amps/2011-04/msg00354.html (8,448 bytes)
- 10. Re: [Amps] GU-84B Conversion (score: 1)
- Author: "Roger (sub1)" <sub1@rogerhalstead.com>
- Date: Wed, 13 Apr 2011 00:44:01 -0400
- When it comes to Pd I think of the Eimac 4CX1500B Vs the Chinese FU728F. Electrically they are *almost* identical. The filament voltage is different and the FU728F has a pd rating of 1200 watts while
- /archives//html/Amps/2011-04/msg00356.html (20,225 bytes)
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