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361. Re: [Amps] Small Amplifier (score: 1)
Author: "Will Matney" <craxd1@ezwv.com>
Date: Tue, 18 Jan 2005 10:33:30 -0500
I have seen where some tried running the cathode driven. However they weren't straight G-G as they used some screen voltage and a bias. They don't run too hot this way in my opinion. But, they carry
/archives//html/Amps/2005-01/msg00348.html (12,105 bytes)

362. Re: [Amps] Tetrodes in GG Configuration (score: 1)
Author: "Will Matney" <craxd1@ezwv.com>
Date: Wed, 19 Jan 2005 13:26:13 -0500
What I can,t figure is why one would want to run a tetrode in G-G where a triode is the very ticket for it? To me, if one wanted to run a tetrode, they would want to run it the way it was designed to
/archives//html/Amps/2005-01/msg00373.html (8,979 bytes)

363. Re: [Amps] Grid driven Multi-band amp using 4-1000 (score: 1)
Author: "Will Matney" <craxd1@ezwv.com>
Date: Wed, 19 Jan 2005 13:34:05 -0500
On Wed, 19 Jan 2005 07:43:09 -0800, R.Measures <r@somis.org> wrote: On Jan 19, 2005, at 7:11 AM, Steven J Fraasch wrote: Has anyone successfully built a multi-band grid driven amplifier using a 4-100
/archives//html/Amps/2005-01/msg00374.html (11,417 bytes)

364. [Amps] A "Greatbuy" (score: 1)
Author: "Will Matney" <craxd1@ezwv.com>
Date: Wed, 19 Jan 2005 15:59:20 -0500
I was looking at some books on eBay today, seen this, and thought a few would like to see it. It was a book about power supplies by a seller named "greatbuybooks". Now generally they always sell olde
/archives//html/Amps/2005-01/msg00379.html (7,316 bytes)

365. [Amps] Help needed (score: 1)
Author: "Will Matney" <craxd1@ezwv.com>
Date: Wed, 19 Jan 2005 23:51:59 -0500
This is not to do with amps but really I need some help off the list. I'm wondering how newer CRT tester-rejuvenators now work, mainly the B&K 490B. The reason being, it uses an anode connection wher
/archives//html/Amps/2005-01/msg00387.html (6,747 bytes)

366. Re: [Amps] Tetrodes in GG Configuration (score: 1)
Author: "Will Matney" <craxd1@ezwv.com>
Date: Thu, 20 Jan 2005 02:22:35 -0500
On Thu, 20 Jan 2005 07:03:21 +0000, Ian White, G3SEK <G3SEK@ifwtech.co.uk> wrote: k7fm wrote: There are some very good reasons to run a tetrode in grounded grid. Using the 4Cx1000A as an example, run
/archives//html/Amps/2005-01/msg00392.html (10,253 bytes)

367. [Amps] Genrad 1689 Digi-Bridge (score: 1)
Author: "Will Matney" <craxd1@ezwv.com>
Date: Thu, 20 Jan 2005 12:11:56 -0500
I ran across this item on eBay with a low starting bid. I would have bid but I own 4 LCR meters now, including a Genrad Digi-Bridge. If you would like a good accurate digital bench LCR meter, this wo
/archives//html/Amps/2005-01/msg00405.html (6,892 bytes)

368. Re: [Amps] Genrad 1689 Digi-Bridge (score: 1)
Author: "Will Matney" <craxd1@ezwv.com>
Date: Thu, 20 Jan 2005 14:56:19 -0500
If I recall, the 555 output means something about the leads not being attached. They made an attachment that connected to the 4 jacks which had some long female clip jacks built in a small box. You c
/archives//html/Amps/2005-01/msg00408.html (8,814 bytes)

369. Re: [Amps] Tetrodes in GG Configuration (score: 1)
Author: "Will Matney" <craxd1@ezwv.com>
Date: Fri, 21 Jan 2005 11:40:58 -0500
On Fri, 21 Jan 2005 07:23:53 +0000, Ian White, G3SEK <G3SEK@ifwtech.co.uk> wrote: David Pruett wrote: I'd like to point out another tetrode configuration which has some useful characteristics, and th
/archives//html/Amps/2005-01/msg00413.html (11,993 bytes)

370. Re: [Amps] High C out (score: 1)
Author: "Will Matney" <craxd1@ezwv.com>
Date: Fri, 21 Jan 2005 12:47:54 -0500
A 300 nH coil (0.3 uH) is not very much. Assuming this would be the tank coil, the 10 meter end being the largest in size, one might just squeeze the coils together to raise the inductance enough to
/archives//html/Amps/2005-01/msg00416.html (8,727 bytes)

371. Re: [Amps] Tetrodes in GG Configuration (score: 1)
Author: "Will Matney" <craxd1@ezwv.com>
Date: Fri, 21 Jan 2005 13:15:42 -0500
Colin, I don't see how you figure this as running the screen and bias at the manufacturers rated voltage should make the IMD products show at their published specs for that tube. The way your saying,
/archives//html/Amps/2005-01/msg00418.html (11,977 bytes)

372. Re: [Amps] High C out (score: 1)
Author: "Will Matney" <craxd1@ezwv.com>
Date: Fri, 21 Jan 2005 13:39:14 -0500
Well, I wasn't for sure as I cant decipher what he wants. He mentioned wanting to know how to increase the inductance by 300 nH, which squeezing the coil would raise it. In a Pi-L, the load C is in b
/archives//html/Amps/2005-01/msg00420.html (10,825 bytes)

373. Re: [Amps] High C out (score: 1)
Author: "Will Matney" <craxd1@ezwv.com>
Date: Fri, 21 Jan 2005 13:59:53 -0500
John and Vic, That's what I thought by reading it but never seen anything of a beast like a L-Pi so I thought it would be wrong to comment. The only other thing I could think he meant was adding to t
/archives//html/Amps/2005-01/msg00423.html (13,088 bytes)

374. Re: [Amps] Tetrodes in GG Configuration (score: 1)
Author: "Will Matney" <craxd1@ezwv.com>
Date: Fri, 21 Jan 2005 14:04:27 -0500
Well, I wasn't for sure as I cant decipher what he wants. He mentioned wanting to know how to increase the inductance by 300 nH, which squeezing the coil would raise it. In a Pi-L, the load C is in b
/archives//html/Amps/2005-01/msg00425.html (11,220 bytes)

375. Re: [Amps] High C out (score: 1)
Author: "Will Matney" <craxd1@ezwv.com>
Date: Fri, 21 Jan 2005 20:34:07 -0500
On Fri, 21 Jan 2005 16:45:16 -0800, Chris <rfcrazy@cox.net> wrote: Thanks for all the info everyone. The circuit is just strait Pi. The C tune cap backed all the way out unmeshed with minimum capacit
/archives//html/Amps/2005-01/msg00441.html (13,630 bytes)

376. Re: [Amps] High C out (score: 1)
Author: "Will Matney" <craxd1@ezwv.com>
Date: Fri, 21 Jan 2005 22:36:38 -0500
Chris, A tap is just a wire soldered to one of the turns of the coil. Say you take the end coil that's hooked to tune C now. This would be the 10 meter coil I figure. Take and wind one just like it e
/archives//html/Amps/2005-01/msg00443.html (14,581 bytes)

377. [Amps] Re: Genrad 1689 Digi-Bridge (score: 1)
Author: "Will Matney" <craxd1@ezwv.com>
Date: Fri, 21 Jan 2005 22:49:10 -0500
Bud, They still make this model and it is expensive new. New, it lists for $8,195.00. The link below shows the model and info. Note that the picture is a 1689 and not the 1689M. The 1689M is similar
/archives//html/Amps/2005-01/msg00445.html (8,297 bytes)

378. Re: [Amps] What is it called? (score: 1)
Author: "Will Matney" <craxd1@ezwv.com>
Date: Sat, 22 Jan 2005 11:55:53 -0500
Hal, The red type is Phenolic and the orange type that has cloth in it is Micarta. Will On Sat, 22 Jan 2005 11:32:52 -0500, Harold B. Mandel <ka1xo@juno.com> wrote: Sirs, There is a material that is
/archives//html/Amps/2005-01/msg00453.html (7,690 bytes)

379. Re: [Amps] 3cpx5000 aka yc-156 (score: 1)
Author: "Will Matney" <craxd1@ezwv.com>
Date: Sat, 22 Jan 2005 22:03:50 -0500
I think it had colon surgery and know comes out of the cathode or maybe cathaterode Will On Sun, 23 Jan 2005 02:56:30 +0000, Tomm Aldridge <KD7QAE@ARRL.NET> wrote: Does that come out of the anode? Ch
/archives//html/Amps/2005-01/msg00472.html (8,115 bytes)

380. Re: [Amps] What is it called? (score: 1)
Author: "Will Matney" <craxd1@ezwv.com>
Date: Sun, 23 Jan 2005 10:54:10 -0500
Peter, On Sun, 23 Jan 2005 09:34:48 -0500, <G3rzp@aol.com> wrote: Generally speaking, the model engineering suppliers are very much cheaper than RS or Farnell, and in many cases, just as fast. Some o
/archives//html/Amps/2005-01/msg00482.html (10,101 bytes)

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