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Total 41 documents matching your query.

21. Re: [Amps] Tetrodes (score: 1)
Author: Ian White GM3SEK <g3sek@ifwtech.co.uk>
Date: Tue, 12 Jul 2005 15:37:49 +0100
wrote: Not in every amp. Correct. I never said it was. Yes. Sit down and work it out. See the photos referenced in my other posting - which you have been pointed to several times before. There are ma
/archives//html/Amps/2005-07/msg00116.html (10,286 bytes)

22. Re: [Amps] Tetrodes (score: 1)
Author: "Larry Carman" <lncarman@swbell.net>
Date: Tue, 12 Jul 2005 10:24:01 -0500
Rich, that's a well know fact in the ham community. I don't understand why there hasn't been more articles in QST, etc about it and why the FCC hasn't addressed this issue. I never fire up the homebr
/archives//html/Amps/2005-07/msg00118.html (13,863 bytes)

23. Re: [Amps] Tetrodes (score: 1)
Author: Vic Rosenthal <vic@rakefet.com>
Date: Tue, 12 Jul 2005 09:00:03 -0700
Which seems to imply that when putting a tube in service that has been stored for some time, the way to activate the getter depends on the tube type. Filament voltage alone should work for a ceramic
/archives//html/Amps/2005-07/msg00119.html (8,365 bytes)

24. Re: [Amps] Tetrodes (score: 1)
Author: "kenw2dtc" <kenw2dtc@comcast.net>
Date: Tue, 12 Jul 2005 12:59:54 -0400
"I don't understand why there hasn't been more articles in QST, etc about it and why the FCC hasn't addressed this issue. I never fire up the homebrewed 3cpx5000 amp during bacon, eggs and beans burr
/archives//html/Amps/2005-07/msg00120.html (8,635 bytes)

25. Re: [Amps] Tetrodes (score: 1)
Author: gdaught6@stanford.edu
Date: Tue, 12 Jul 2005 13:55:48 -0700
< snip > You bet it can! Current from the anode supply enters the anode in the usual direction (this is Ben Franklin's current, not electron flow) and follows the arc inside the tube from anode to sc
/archives//html/Amps/2005-07/msg00122.html (8,073 bytes)

26. Re: [Amps] Tetrodes (score: 1)
Author: R@contesting.com;Measures <r@somis.org>
Date: Tue, 12 Jul 2005 14:26:48 -0700
agreed So electrons don't carry the current in such an arc? okay, but the quantities of trapped gas in all but graphite are quite small. In a vacuum capacitor, the Cu whiskers burn off with no firewo
/archives//html/Amps/2005-07/msg00123.html (12,313 bytes)

27. Re: [Amps] Tetrodes (score: 1)
Author: R@contesting.com;Measures <r@somis.org>
Date: Tue, 12 Jul 2005 14:31:12 -0700
Peter -- It sounds as if Ian is mixing hole movement in a P-type crystal lattice with what goes on in a vacuum. Rich Measures, 805.386.3734, AG6K, www.somis.org ______________________________________
/archives//html/Amps/2005-07/msg00124.html (9,724 bytes)

28. Re: [Amps] Tetrodes (score: 1)
Author: R@contesting.com;Measures <r@somis.org>
Date: Tue, 12 Jul 2005 14:44:50 -0700
A healthy 3-500Z typically has a grid-anode withstanding ability of uses a 25kV Tune-C Okay. An 8171. The anode potential is +8kV, the screen potential is +1500V. Screen current is +120mA. However, a
/archives//html/Amps/2005-07/msg00125.html (10,753 bytes)

29. Re: [Amps] Tetrodes (score: 1)
Author: R@contesting.com;Measures <r@somis.org>
Date: Tue, 12 Jul 2005 14:49:19 -0700
Public discussion of this matter in a respected magazine like *QST* might raise a stink. Better to be safe than sorry. Rich Measures, 805.386.3734, AG6K, www.somis.org _______________________________
/archives//html/Amps/2005-07/msg00126.html (15,916 bytes)

30. Re: [Amps] Tetrodes (score: 1)
Author: R@contesting.com;Measures <r@somis.org>
Date: Tue, 12 Jul 2005 14:56:19 -0700
Good logic, Vic. This is why actually operating a new 3-500Z is the only way possible to activate the getter. Applying only filament-voltage for 24-hours to "condition" a 3-500Z is yet another laugha
/archives//html/Amps/2005-07/msg00127.html (9,557 bytes)

31. Re: [Amps] Tetrodes (score: 1)
Author: Ian White GM3SEK <g3sek@ifwtech.co.uk>
Date: Tue, 12 Jul 2005 23:04:47 +0100
A great deal, but I don't have time to trade the same old one-liners with him, yet again. However, the following are genuine questions so I'll try to answer them. The gettering (adsorption) reaction
/archives//html/Amps/2005-07/msg00129.html (10,025 bytes)

32. Re: [Amps] Tetrodes (score: 1)
Author: R@contesting.com;Measures <r@somis.org>
Date: Tue, 12 Jul 2005 15:24:36 -0700
Story adjustment time. - If zirconium gettering takes place at room temperature, then tubes that are stored at room temperature should exhibit less and less leakage -- which is undoubtedly not the ca
/archives//html/Amps/2005-07/msg00130.html (9,175 bytes)

33. Re: [Amps] Tetrodes (score: 1)
Author: GGLL <nagato@arnet.com.ar>
Date: Tue, 12 Jul 2005 20:02:58 -0300
Please, let me jump in here, with my usual question: for my two, nos RCA 8122 (they have been stored many years) that I plan to put in use in a friend's NCL 2000 linear, will suffice to turn on heate
/archives//html/Amps/2005-07/msg00131.html (9,993 bytes)

34. Re: [Amps] Tetrodes (score: 1)
Author: "m.ford" <k1ern@direcway.com>
Date: Tue, 12 Jul 2005 20:47:37 -0400
Hello Guillermo, A couple of years ago I set out to test a few dozen 8122's that I had accumulated for my four NCL-2000 amps. I had both RCA and BURLE but no EIMAC and the date codes were from mid 60
/archives//html/Amps/2005-07/msg00132.html (11,121 bytes)

35. Re: [Amps] Tetrodes (score: 1)
Author: gdaught6@stanford.edu
Date: Tue, 12 Jul 2005 21:16:58 -0700
Ian, please turn off the bubble machine, or whatever has to happen! I've gotten about 10 copies of this message. Or is it just me?! 73, George T. Daughters, K6GT _____________________________________
/archives//html/Amps/2005-07/msg00134.html (10,507 bytes)

36. Re: [Amps] Tetrodes (score: 1)
Author: "ad5gb" <ad5gb@myway.com>
Date: Wed, 13 Jul 2005 01:15:49 -0400 (EDT)
Ian has a virus. It's called Microsoft. (sorry couldn't resist) -- Randall D. DuCharme (Radio AD5GB) Powered by FreeBSD! The Power to Serve Ian, please turn off the bubble machine, or whatever has to
/archives//html/Amps/2005-07/msg00136.html (11,216 bytes)

37. Re: [Amps] Tetrodes (score: 1)
Author: Ian White GM3SEK <g3sek@ifwtech.co.uk>
Date: Wed, 13 Jul 2005 07:30:39 +0100
Only one copy of that message left from here, same as normal. Two reasons why I use this e-mail software: it ISN'T from Microsoft, and it NEVER inserts HTML markup tags. -- 73 from Ian G/GM3SEK _____
/archives//html/Amps/2005-07/msg00138.html (8,514 bytes)

38. Re: [Amps] Tetrodes (score: 1)
Author: R@contesting.com;Measures <r@somis.org>
Date: Wed, 13 Jul 2005 03:21:40 -0700
That's a terrible thing to say, Randy - even if it is true. cheerz Rich Measures, 805.386.3734, AG6K, www.somis.org _______________________________________________ Amps mailing list Amps@contesting.c
/archives//html/Amps/2005-07/msg00140.html (12,282 bytes)

39. Re: [Amps] Tetrodes (score: 1)
Author: "Michael J. Tubby G8TIC" <mike.tubby@thorcom.co.uk>
Date: Mon, 25 Jul 2005 02:02:34 +0100
All, I can't speak for the gas release, but I can speak as the owner of a 2 x 4CX250B 144MHz amp that used to "let go" randomly before I got a handle on the problem... I'm talking of 25+ years ago he
/archives//html/Amps/2005-07/msg00323.html (15,290 bytes)

40. Re: [Amps] Tetrodes (score: 1)
Author: Dan K9ZF <n9rla@yahoo.com>
Date: Tue, 26 Jul 2005 15:43:35 -0500
That sounds interesting. I'm familiar with the W1SL, is this "variation" written up anywhere? If it's been published or on the web I would like to see it. I've been researching amp building for the l
/archives//html/Amps/2005-07/msg00324.html (9,174 bytes)

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