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281. Re: [Amps] Amps Digest, Vol 31, Issue 60 (score: 1)
Author: Bill Fuqua <wlfuqu00@uky.edu>
Date: Mon, 01 Aug 2005 11:25:49 -0400
OK, I have got to reply. Most of the hams that build amplifiers for 11 meter operators and those that know little about RF are illegal CBers that have taken the relative easy exams and gotten ham tic
/archives//html/Amps/2005-08/msg00004.html (10,990 bytes)

282. Re: [Amps] RE : Amps Digest, Vol 32, Issue 12: Metric system (score: 1)
Author: Bill Fuqua <wlfuqu00@uky.edu>
Date: Thu, 04 Aug 2005 17:10:05 -0400
Don't people have 10 digits? 73 Bill wa4lav _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2005-08/msg00122.html (9,974 bytes)

283. Re: [Amps] TV sweep tubes and 6146s (score: 1)
Author: Bill Fuqua <wlfuqu00@uky.edu>
Date: Thu, 11 Aug 2005 19:41:17 -0400
I once ran 4x 6AG7's with 1200 volts on the plates in grounded grid. They required conditioning but it worked and got 200 or so watts put PEP with a couple of watts drive on 20 meters. The tubes were
/archives//html/Amps/2005-08/msg00422.html (10,635 bytes)

284. Re: [Amps] Ribbon Beam Amplifiers (score: 1)
Author: Bill Fuqua <wlfuqu00@uky.edu>
Date: Mon, 15 Aug 2005 09:19:34 -0400
I suspect it is a compact form of a traveling wave tube. They have developed cold cathodes for small amplifying devices over the past few years. Some use field ionization. They have even made, by usi
/archives//html/Amps/2005-08/msg00522.html (8,781 bytes)

285. [Amps] Need data sheet (score: 1)
Author: Bill Fuqua <wlfuqu00@uky.edu>
Date: Tue, 16 Aug 2005 16:47:33 -0400
I am looking for the data sheet for the VT-158 Zahl radar tube. This tube was made of four 100t tubes in a push-pull oscillator with hair pin resonators all in a very large glass envelope. I have one
/archives//html/Amps/2005-08/msg00554.html (6,309 bytes)

286. Re: [Amps] Alpha releases New Amp 9500 (score: 1)
Author: Bill Fuqua <wlfuqu00@uky.edu>
Date: Fri, 16 Sep 2005 16:10:07 -0400
How long has RS-232? been around. Many times longer than USB, Fire Wire, Bluetooth, IR, etc will. However they all have adapters to RS-232. I have run into the same problem with a low cost DDS signal
/archives//html/Amps/2005-09/msg00157.html (11,435 bytes)

287. Re: [Amps] Alpha releases New Amp 9500 (score: 1)
Author: "Bill L. Fuqua" <wlfuqu00@uky.edu>
Date: Fri, 16 Sep 2005 23:36:47 -0400
If you can afford to buy the amp you can afford a converter. USB is being replaced by Fire Wire. It wont be long till computers will not have USB ports or Fire Wire. These newer standards come and go
/archives//html/Amps/2005-09/msg00162.html (10,549 bytes)

288. Re: [Amps] Outgassing tubes. (score: 1)
Author: Bill Fuqua <wlfuqu00@uky.edu>
Date: Sun, 02 Oct 2005 21:10:25 -0400
I have been on vacation and just got back and saw this thread starting with"Question". OK, you apply HV to a tube and it arcs a couple of times and then it is OK. Does that mean that you have remove
/archives//html/Amps/2005-10/msg00079.html (12,300 bytes)

289. [Amps] Amplifier panel meters and panel (score: 1)
Author: Bill Fuqua <wlfuqu00@uky.edu>
Date: Mon, 10 Oct 2005 11:44:42 -0400
I was looking at one of my sources for cheap parts ( I should say inexpensive) and found this. Obviously not for a 19" rack. I don't know how many they have, it may only be one. http://www.alltronics
/archives//html/Amps/2005-10/msg00244.html (6,753 bytes)

290. Re: [Amps] Dedicated 220AC Wiring for Amps.. (score: 1)
Author: Bill Fuqua <wlfuqu00@uky.edu>
Date: Fri, 14 Oct 2005 10:39:12 -0400
The minimum size wire specified in the "National Electrical Code" is chosen for voltage drop, and to make it easy for the electricians to make the right choice, in most cases, and not for temperature
/archives//html/Amps/2005-10/msg00372.html (9,893 bytes)

291. Re: [Amps] Drake L4 with 3-400Z photos (score: 1)
Author: Bill Fuqua <wlfuqu00@uky.edu>
Date: Fri, 14 Oct 2005 12:24:52 -0400
Speaking of photos with the cover off. I have taken some photos like these before and I am amazed that up close that my digital camera still works. I expect that some don't work in intense RF fields.
/archives//html/Amps/2005-10/msg00379.html (10,941 bytes)

292. Re: [Amps] 220VAC Wiring info for SB-220 (score: 1)
Author: Bill Fuqua <wlfuqu00@uky.edu>
Date: Fri, 14 Oct 2005 17:13:52 -0400
NO WWW just http://bama.sbc.edu/ 73 Bill wa4lav _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2005-10/msg00390.html (9,436 bytes)

293. Re: [Amps] Meaning of "conduction cooled" (score: 1)
Author: Bill Fuqua <wlfuqu00@uky.edu>
Date: Thu, 03 Nov 2005 13:26:19 -0500
If a tube is convection, conduction, radiation, liquid or vapor phase cooled has to do with how heat ,produced by the kinetic energy from colliding electrons, is removed from the anode. From there it
/archives//html/Amps/2005-11/msg00053.html (8,404 bytes)

294. Re: [Amps] 40KW transmitter on e-bay! (score: 1)
Author: Bill Fuqua <wlfuqu00@uky.edu>
Date: Fri, 11 Nov 2005 13:52:35 -0500
Notice the last sentence "shipping will be via pelican and no tracking number will be available. " It is a joke. \ 73 Bill wa4lav _______________________________________________ Amps mailing list Amp
/archives//html/Amps/2005-11/msg00146.html (7,297 bytes)

295. Re: [Amps] Broadbanding a HFS 10000D RF amplifier? (score: 1)
Author: "Bill L. Fuqua" <wlfuqu00@uky.edu>
Date: Sun, 27 Nov 2005 19:51:24 -0500
You can't broadband it but you can bandswitch it. 73 bill wa4lav Has anyone had any experience broadbanding a HFS 10000D RF amplifier? This is an RF sputtering RF amplifier that operates at 13.56 Mhz
/archives//html/Amps/2005-11/msg00500.html (7,657 bytes)

296. Re: [Amps] Designing the Cleanest Linear with RF Negative Feedback (score: 1)
Author: Bill Fuqua <wlfuqu00@uky.edu>
Date: Fri, 16 Dec 2005 18:05:01 -0500
Better yet, if the two tones are only a hundred Hertz or so apart, you can take the audio output of the SSB receiver and put it into the sound card of your computer and do an FFT. You can use a numbe
/archives//html/Amps/2005-12/msg00213.html (15,206 bytes)

297. Re: [Amps] Designing the Cleanest Linear with RF Negative Feedback (score: 1)
Author: "Bill L. Fuqua" <wlfuqu00@uky.edu>
Date: Sat, 17 Dec 2005 10:22:31 -0500
In theory and practice. This is how most "DSP IF" receivers work. The last IF is 10 or 12kHz from a product detector "mixer" and then to a DSP board which in this case is a PC. Naturally you can't al
/archives//html/Amps/2005-12/msg00223.html (16,272 bytes)

298. Re: [Amps] Designing the Cleanest Linear with RF Negative Feedback (score: 1)
Author: "Bill L. Fuqua" <wlfuqu00@uky.edu>
Date: Sun, 18 Dec 2005 18:38:34 -0500
Just looked at the article. Seems to be what I suggested earlier. Low mu triode in grounded grid. The advantage of a 4CX tube with control grid connected to the cathode requires no bias voltage and i
/archives//html/Amps/2005-12/msg00257.html (9,492 bytes)

299. [Amps] Fwd: Re: 4-400A Input impedance (score: 1)
Author: Bill Fuqua <wlfuqu00@uky.edu>
Date: Wed, 18 Jan 2006 15:26:29 -0500
_______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2006-01/msg00455.html (7,618 bytes)

300. Re: [Amps] Tuned Input (score: 1)
Author: Bill Fuqua <wlfuqu00@uky.edu>
Date: Fri, 20 Jan 2006 11:39:28 -0500
It just occurred to me that if you shunted the input of the amplifier with a capacitance who's reactance is say 1/5 of the input resistance the auto tuner will try to match it and thus you will get a
/archives//html/Amps/2006-01/msg00487.html (10,173 bytes)


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