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21. Re: [Amps] What is it called? (score: 1)
Author: David Kirkby <david.kirkby@onetel.net>
Date: Sun, 23 Jan 2005 08:28:15 +0000
Harold B. Mandel wrote: Sirs, There is a material that is supplied in sheets of varying thicknesses, colored red, that makes excellent insulating boards. Does anyone know its trade name or who sells
/archives//html/Amps/2005-01/msg00475.html (8,781 bytes)

22. Re: [Amps] What is it called? (score: 1)
Author: David Kirkby <david.kirkby@onetel.net>
Date: Sun, 23 Jan 2005 09:07:11 +0000
Steve Thompson wrote: Tufnol (or similar spelling) is one possibility. You can get it from RS components in the UK, althouhg they have a international presence. It is a very good insulator, but not e
/archives//html/Amps/2005-01/msg00478.html (10,360 bytes)

23. Re: [Amps] What is it called? (score: 1)
Author: David Kirkby <david.kirkby@onetel.net>
Date: Sun, 23 Jan 2005 09:55:50 +0000
Ian White, G3SEK wrote: Tufnol is a machinable grade of plain old-fashioned phenolic (Brit: paxolin). The big UK electronics distributors like RS Components and Farnell are incredibly expensive for e
/archives//html/Amps/2005-01/msg00479.html (11,338 bytes)

24. Re: [Amps] OT help (score: 1)
Author: David Kirkby <david.kirkby@onetel.net>
Date: Sun, 23 Jan 2005 16:52:11 +0000
Roger D Johnson wrote: I recently tried to scan some Eimac tube datasheets for David Kirby's website. I am using a HP OfficeJet 6110 with the supplied HP Director software which has a save to PDF fun
/archives//html/Amps/2005-01/msg00486.html (11,610 bytes)

25. Re: [Amps] Drawing of SK-860 Socket (score: 1)
Author: David Kirkby <david.kirkby@onetel.net>
Date: Tue, 25 Jan 2005 09:00:22 +0000
Crawfish wrote: I need a drawing of the Eimac SK-860 socket for the 3CX1000A7 tube. I need to know which pin is which. I know one side of th filament is on the last plate, but need a factory drawing.
/archives//html/Amps/2005-01/msg00517.html (8,991 bytes)

26. [Amps] Help - anyone with a large bandwidth connection willing toshare it? (score: 1)
Author: David Kirkby <david.kirkby@onetel.net>
Date: Thu, 27 Jan 2005 00:32:01 +0000
Hi, at http://www.g8wrb.org/ there is a large collection of tube data sheets and applications notes (mainly Eimac, Burle and Svetlan). These total 500MB, but are being expanded all the time. Most of
/archives//html/Amps/2005-01/msg00529.html (9,326 bytes)

27. [Amps] Anyone got data on the Eimac YC-179 ? (score: 1)
Author: David Kirkby <david.kirkby@onetel.net>
Date: Mon, 31 Jan 2005 02:06:33 +0000
Has anyone got any data on this tube? http://www.g8wrb.org/data/Eimac/pictures/YC-179.jpg BTW. if anyone wants the data from http://www.g8wrb.org/ on a CD, I will send one at a nominal cost ($10 incl
/archives//html/Amps/2005-01/msg00630.html (7,734 bytes)

28. Re: [Amps] Henry Radio (score: 1)
Author: David Kirkby <david.kirkby@onetel.net>
Date: Tue, 01 Feb 2005 00:49:03 +0000
donii@sympatico.ca wrote: I heard the other day that many Magnetic Resonance medical devices use tube type linears. Peter VE2FAR The Institute of Neurology in London <http://www.ion.ucl.ac.uk/> has o
/archives//html/Amps/2005-01/msg00659.html (9,401 bytes)

29. [Amps] Audio Amplifiers - this will make you laugh (score: 1)
Author: David Kirkby <david.kirkby@onetel.net>
Date: Tue, 01 Feb 2005 01:07:47 +0000
Take a look at http://www.g8wrb.org/useful-stuff/audiophools.pdf The title is 'Aromatherapy and Audiophools' It's not related to RF amps, but audio ones, but I think the majority of people here will
/archives//html/Amps/2005-01/msg00660.html (7,108 bytes)

30. Re: [Amps] Henry Radio (score: 1)
Author: David Kirkby <david.kirkby@onetel.net>
Date: Tue, 01 Feb 2005 01:39:29 +0000
David Kirkby wrote: donii@sympatico.ca wrote: I heard the other day that many Magnetic Resonance medical devices use tube type linears. Peter VE2FAR The Institute of Neurology in London <http://www.i
/archives//html/Amps/2005-01/msg00661.html (7,922 bytes)

31. Re: [Amps] Choices for valve linear project 1st timer! (score: 1)
Author: David Kirkby <david.kirkby@onetel.net>
Date: Tue, 01 Feb 2005 18:56:32 +0000
R.Measures wrote: On Feb 1, 2005, at 4:26 AM, Simon Steed wrote: Anybody is welcome to the entire contents of my Web site because that was my intent. Richard L. Measures, AG6K, 805.386.3734. www.somi
/archives//html/Amps/2005-02/msg00011.html (25,392 bytes)

32. Re: [Amps] 10 DB increase (score: 1)
Author: David Kirkby <david.kirkby@onetel.net>
Date: Sat, 05 Feb 2005 14:34:01 +0000
Bob Alexander wrote: I went back to the archive to find the original question. S-meters do not measure received signal level accurately because they do not measure the signal but rather the level of
/archives//html/Amps/2005-02/msg00144.html (9,876 bytes)

33. Re: [Amps] 10 DB increase (score: 1)
Author: David Kirkby <david.kirkby@onetel.net>
Date: Sat, 05 Feb 2005 18:41:18 +0000
R.Measures wrote: After George Grammar left QST,things changed and the advertisers became more important than QST subscribers. When an advertised in QST, manufactured, "3kW" tuner caught fire at 900W
/archives//html/Amps/2005-02/msg00156.html (10,630 bytes)

34. Re: [Amps] 10dB and propagation (score: 1)
Author: David Kirkby <david.kirkby@onetel.net>
Date: Sun, 06 Feb 2005 16:05:49 +0000
K3BU@aol.com wrote: I have noticed this effect and I was glad to see more "proof" in Rich's post. See my old propagation article at http://members.aol.com/ve3bmv/bmvpropagation.htm where I speculated
/archives//html/Amps/2005-02/msg00197.html (10,638 bytes)

35. Re: [Amps] 10dB and propagation (score: 1)
Author: David Kirkby <david.kirkby@onetel.net>
Date: Mon, 07 Feb 2005 01:46:31 +0000
Ian White G3SEK wrote: Yuri wrote: You guys might try to poke fun at this. But there are many factors contributing to signal levels received at the other end. Antenna pattern, local ground conditions
/archives//html/Amps/2005-02/msg00211.html (11,614 bytes)

36. Re: [Amps] 10dB and propagation (score: 1)
Author: David Kirkby <david.kirkby@onetel.net>
Date: Mon, 07 Feb 2005 23:32:02 +0000
K3BU@aol.com wrote: In a message dated 2/6/2005 11:12:46 AM Eastern Standard Time, david.kirkby@onetel.net writes: Yet refraction of radio waves was understood well before 1980 when you wrote that. A
/archives//html/Amps/2005-02/msg00265.html (13,676 bytes)

37. Re: [Amps] 10dB and propagation (score: 1)
Author: David Kirkby <david.kirkby@onetel.net>
Date: Tue, 08 Feb 2005 02:25:50 +0000
gdaught6@stanford.edu wrote: On 7 Feb 2005 at 23:32, David Kirkby wrote: (paraphrasing another) Your article says radio waves don't propagate by reflection, What? I guess we'd better trash our Yagis
/archives//html/Amps/2005-02/msg00279.html (10,654 bytes)

38. Re: [Amps] Re: 10dB and propagation (score: 1)
Author: David Kirkby <david.kirkby@onetel.net>
Date: Thu, 10 Feb 2005 00:28:52 +0000
David Lisney wrote: From experience over the years measurements that appear too good to be true often are. Sometimes small errors accumulate, a shame really, the dc-dc converter with 102% efficiency
/archives//html/Amps/2005-02/msg00359.html (10,025 bytes)

39. Re: [Amps] Re: 10dB and propagation (score: 1)
Author: David Kirkby <david.kirkby@onetel.net>
Date: Thu, 10 Feb 2005 00:45:45 +0000
R.Measures wrote: On Feb 7, 2005, at 7:53 PM, Jim Nowotarski wrote: How about: 1) the bypass path in the amp had 3dB of loss? The bypass path had the same loss on days when the free-3db was there and
/archives//html/Amps/2005-02/msg00361.html (9,252 bytes)

40. Re: [Amps] New FET's (score: 1)
Author: David Kirkby <david.kirkby@onetel.net>
Date: Thu, 10 Feb 2005 00:52:45 +0000
Will Matney wrote: Got an e-mail earlier today about International Rectifier having a new FET that would replace the 2N2907 and 2N2222. Quote; "The IRHLUB7970Z4 and IRHLUB770Z4 require less energy, s
/archives//html/Amps/2005-02/msg00362.html (7,554 bytes)

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