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Total 1085 documents matching your query.

381. Re: [Amps] sk-265A tube socket (score: 1)
Author: "Bill L. Fuqua" <wlfuqu00@uky.edu>
Date: Sun, 06 May 2007 21:46:13 -0400
An 813 socket will fit the 264 also but I don't know if the SK-265 will fit a 813. 73 bill wa4lav --Original Message-- From: Sugiyama <ji3kdh@2333.net> To: "Amps Amps" <amps@contesting.com> Date: Mon
/archives//html/Amps/2007-05/msg00047.html (7,777 bytes)

382. [Amps] SGC Mini-Lini (score: 1)
Author: Bill Fuqua <wlfuqu00@uky.edu>
Date: Tue, 22 May 2007 15:30:55 -0400
Did not see the SGC Mini-Lini at Dayton this year. I suspect their problems are worse than previously advertised. Anyone have any inside info? 73 Bill wa4lav _________________________________________
/archives//html/Amps/2007-05/msg00174.html (6,149 bytes)

383. Re: [Amps] Amps Digest, Vol 54, Issue 3 (score: 1)
Author: "Bill L. Fuqua" <wlfuqu00@uky.edu>
Date: Sun, 03 Jun 2007 13:20:00 -0400
There are a lot of reasons not to replace 3-500z tubes with 4-400 tubes but it is not because they dont work well in grounded grid zero bias configuration. They in fact do as well documented over the
/archives//html/Amps/2007-06/msg00012.html (10,397 bytes)

384. Re: [Amps] tubes?? (score: 1)
Author: Bill Fuqua <wlfuqu00@uky.edu>
Date: Thu, 05 Jul 2007 12:42:20 -0400
Amperex power tubes are made by Covimag in France. http://www.covimag.fr/products.html As far as I know covimag the only one still making 3-1000Z,H, 4PR1000A and 4-1000A tubes. Triton was not very su
/archives//html/Amps/2007-07/msg00039.html (9,892 bytes)

385. Re: [Amps] 200 Watt Fast Relay (score: 1)
Author: Bill Fuqua <wlfuqu00@uky.edu>
Date: Tue, 10 Jul 2007 14:24:16 -0400
Here is a problem I have with relay specifications. Usually, for weak signal applications we use gold plated contact switches and relays. Since most relays or switches are normally exposed to air, ox
/archives//html/Amps/2007-07/msg00165.html (7,426 bytes)

386. Re: [Amps] Weighing In On Solder Water Wash Flux (score: 1)
Author: Bill Fuqua <wlfuqu00@uky.edu>
Date: Wed, 11 Jul 2007 11:57:54 -0400
Water soluble fluxes are acid. They have come about due to the industry wanting to clean circuit boards with water and not organic solvents. Disposing of large quantities of organic solvents is a rea
/archives//html/Amps/2007-07/msg00192.html (9,779 bytes)

387. Re: [Amps] suppressors (score: 1)
Author: Bill Fuqua <wlfuqu00@uky.edu>
Date: Fri, 13 Jul 2007 09:24:37 -0400
Not that it makes much difference but with some tubes the plate to ground capacitance is a good portion of the "tune-C" capacitance on 10 meters, so there is a fair portion of the circulating current
/archives//html/Amps/2007-07/msg00209.html (8,920 bytes)

388. Re: [Amps] Gassy Tubes/Technology Museum looking for artifacts (score: 1)
Author: Bill Fuqua <wlfuqu00@uky.edu>
Date: Thu, 26 Jul 2007 09:47:22 -0400
Some 1625s , but not all had separate "beam forming plate" leads and cathode leads. They could be modified for Grounded Grid operation. 73 Bill wa4lav _______________________________________________
/archives//html/Amps/2007-07/msg00433.html (10,060 bytes)

389. Re: [Amps] Looking to purchase a good 6 meter amplifier (score: 1)
Author: Bill Fuqua <wlfuqu00@uky.edu>
Date: Mon, 30 Jul 2007 15:46:00 -0400
I just looked at the specifications for the Swan Mark VI which had a pair of 4-400Z tubes originally. Oddly enough it states that I operate at 1000 watts continuous DC plate input power on CW, RTTY a
/archives//html/Amps/2007-07/msg00524.html (8,061 bytes)

390. [Amps] 4PR1000A (score: 1)
Author: Bill Fuqua <wlfuqu00@uky.edu>
Date: Mon, 30 Jul 2007 16:49:57 -0400
Looking for some creative ideas for some very, very low emission AMPEREX graphite plate 4PR1000A tubes. These are real duds but look good. These have been run for over 2 years, 24 hours a day but don
/archives//html/Amps/2007-07/msg00529.html (7,560 bytes)

391. Re: [Amps] 4PR1000A (score: 1)
Author: Bill Fuqua <wlfuqu00@uky.edu>
Date: Tue, 31 Jul 2007 11:34:09 -0400
I had a thought. At 500 volts screen grid , 50 control grid , and 3 kV on the plate I managed to get 0.4 amps out of them. Wonder if I can come up with an easy connection using a microwave oven trans
/archives//html/Amps/2007-07/msg00543.html (9,671 bytes)

392. Re: [Amps] Project for 8122 tubes (score: 1)
Author: "Fuqua, Bill L" <wlfuqu00@uky.edu>
Date: Tue, 14 Aug 2007 09:23:09 -0400
8122 tubes were used in a few amplifiers but not not many. They were an inexpensive solution for mobile amplifiers and for some larger amplifiers. They are very similar to 4cx250F tubes but have a so
/archives//html/Amps/2007-08/msg00072.html (8,661 bytes)

393. [Amps] Fwd: Re: [BOATANCHORS-TEMPE] [Boatanchors] SmallestDual-6146 HF Transmitter? (score: 1)
Author: Bill Fuqua <wlfuqu00@uky.edu>
Date: Thu, 23 Aug 2007 13:38:12 -0400
I have to agree. the T150 looks like a good choice. It would be easy to work with too. Lots of space on the inside to get make any modifications and no printed circuit boards. 73 Bill wa4lav ________
/archives//html/Amps/2007-08/msg00151.html (9,993 bytes)

394. [Amps] Amphenol Connectors made in China (score: 1)
Author: Bill Fuqua <wlfuqu00@uky.edu>
Date: Wed, 29 Aug 2007 13:50:46 -0400
Just started installing some Amphenol BNC panel mount connectors and found them to be very substandard to the products I am accustomed to getting. I started spinning no the nut by hand and the nut wa
/archives//html/Amps/2007-08/msg00232.html (6,641 bytes)

395. Re: [Amps] rotary switch - shorting/non-shorting (score: 1)
Author: Bill Fuqua <wlfuqu00@uky.edu>
Date: Thu, 30 Aug 2007 15:22:43 -0400
Shorting and non-shorting are common terms in describing rotary switches. The make-before-break , etc. are common for toggle switches and relays. 73 Bill wa4lav ______________________________________
/archives//html/Amps/2007-08/msg00265.html (9,897 bytes)

396. Re: [Amps] crossmodulation in PA (score: 1)
Author: Bill Fuqua <wlfuqu00@uky.edu>
Date: Fri, 7 Sep 2007 09:40:42 -0400
In the old days military sites had the receiving equipment and antennas a few miles away from the transmitting site to avoid a number of problems. Naturally receivers those days were easily overloade
/archives//html/Amps/2007-09/msg00073.html (8,468 bytes)

397. Re: [Amps] Load Pulling (score: 1)
Author: Bill Fuqua <wlfuqu00@uky.edu>
Date: Wed, 12 Sep 2007 09:33:00 -0400
20ns x 70 =1400 ns every 500 ns? Seems to me that the easiest way would be to construct a tuner and a 50 ohm dummy load with a thermometer. Tune for max dummy load temp. and then measure the impedanc
/archives//html/Amps/2007-09/msg00120.html (8,003 bytes)

398. Re: [Amps] Load Pulling (score: 1)
Author: Bill Fuqua <wlfuqu00@uky.edu>
Date: Wed, 12 Sep 2007 12:27:04 -0400
Don't know what it is Alex. Just don't put an antenna on it. _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2007-09/msg00129.html (9,961 bytes)

399. Re: [Amps] Testing 8874s (score: 1)
Author: Bill Fuqua <wlfuqu00@uky.edu>
Date: Thu, 1 Nov 2007 22:27:00 -0400
I had a bucket full of the Motorola conduction cooled tetrodes ( similar to 4cs250) tubes pulled from repeater and pager amplifiers. Got a deal on them, I thought, at a hamfest. Just about all of the
/archives//html/Amps/2007-11/msg00012.html (8,631 bytes)

400. Re: [Amps] Interesting Merger in the Works? (score: 1)
Author: Bill Fuqua <wlfuqu00@uky.edu>
Date: Tue, 6 Nov 2007 08:55:39 -0500
This is where the MBAs with the sharp red pencils go to work. Scratching out product lines that bring the least profit, have the subassemblies and circuit boards made in China and do the final assemb
/archives//html/Amps/2007-11/msg00079.html (10,363 bytes)

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