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1. Re: [Amps] Parasitics (score: 1): Author: Bill Fuqua <wlfuqu00@uky.edu>; Date: Thu, 21 Aug 2003 09:44:42 -0400; There are a number of types of parasitic oscillations. In grounded grid amplifiers the most common is VHF. But there is a fundamental mode as well but more often occurs in common cathode amplifiers (; /archives//html/Amps/2003-08/msg00003.html (10,460 bytes)
2. [Amps] Filament Choke Inductance (score: 1): Author: wlfuqu00@uky.edu (Bill Fuqua); Date: Fri, 03 Jan 2003 13:55:06 -0500; High current filament chokes should be bifillar would. This reduces the 60 Hz field in the core which could modulate the reactance of the choke and introduce 60 Hz hum on a carrier. The 60Hz current; /archives//html/Amps/2003-01/msg00024.html (8,004 bytes)
3. [Amps] Thunderbolt Linear amp (score: 1): Author: wlfuqu00@uky.edu (Bill Fuqua); Date: Fri, 10 Jan 2003 10:23:56 -0500; Has any of you tried some easy improvements to the old Johnson Thunderbolt? I just got a parts unit that I plan on restoring but I may not make it original. One thing that strikes me is the low plate; /archives//html/Amps/2003-01/msg00074.html (6,892 bytes)
4. [Amps] T'bolt ideas (score: 1): Author: wlfuqu00@uky.edu (Bill Fuqua); Date: Sat, 11 Jan 2003 15:27:27 -0500; What about AB2 cathode driven with both grids biased as grid driven. Should be very linear since there would be little cathode current flowing thru the grids most to the anode. 73 Bill wa4lav; /archives//html/Amps/2003-01/msg00091.html (8,370 bytes)
5. [Amps] Anodize versus alodine/chromate conversion (score: 1): Author: wlfuqu00@uky.edu (Bill Fuqua); Date: Wed, 15 Jan 2003 13:11:30 -0500; Actually, using lock washers to dig thru surface is a good idea unless you have gold plated chassis. Almost all surfaces, particularly aluminum become oxidized. Using a "star" external tooth lock was; /archives//html/Amps/2003-01/msg00120.html (8,776 bytes)
6. [Amps] Correction:: FS rectifier stacks High voltage and current (score: 1): Author: wlfuqu00@uky.edu (wl fuqua); Date: Wed, 15 Jan 2003 13:55:03 -0500; I still have a number of RCA CR305's for single phase. These are a foot long and 2.25 inches wide and 2" tall 7200 PIV at 5 amps. They may be found in RCA book HB-10 vol. 2 Each has 12 stud mount 600; /archives//html/Amps/2003-01/msg00123.html (7,337 bytes)
7. [Amps] RF chokes (roll you own) (score: 1): Author: wlfuqu00@uky.edu (Bill Fuqua); Date: Wed, 15 Jan 2003 14:03:46 -0500; I have some 6" long and 1 " diameter Ceramic insulators that I will sell in multiples of 5 for $30 which includes shipping to lower 48 States USPS snail mail. Please, No DX request. I don't want to d; /archives//html/Amps/2003-01/msg00124.html (7,050 bytes)
8. [Amps] New 4-1000A and New Amp design in works (score: 1): Author: wlfuqu00@uky.edu (Bill Fuqua); Date: Thu, 16 Jan 2003 09:20:24 -0500; I just received a new AMPEREX 4-1000A today from RF Parts. These tubes are great and hope to never see a Triton tube again. These are made by a company in France called Covimag and have massive graph; /archives//html/Amps/2003-01/msg00126.html (8,984 bytes)
9. [Amps] L networks in Amplifiers (score: 1): Author: wlfuqu00@uky.edu (Bill Fuqua); Date: Thu, 16 Jan 2003 10:07:30 -0500; It seems to me that if you have a band switched low pass filter following your impedance matching network the Q of the network is not so important. In fact a Q of 2 or 3 would be just fine. It perfor; /archives//html/Amps/2003-01/msg00127.html (6,821 bytes)
10. [Amps] L networks in Amplifiers (score: 1): Author: wlfuqu00@uky.edu (Bill Fuqua); Date: Thu, 16 Jan 2003 12:05:39 -0500; Sorry for the confusion. I was thinking in a more general sense such as amplifiers using parallel 3-500z or even a 3CX3000A7 that have low output impedances. My point is that they would benefit from; /archives//html/Amps/2003-01/msg00129.html (9,754 bytes)
11. [Amps] CBer?? (score: 1): Author: wlfuqu00@uky.edu (wl fuqua); Date: Wed, 04 Dec 2002 10:06:17 -0500; That is too bad. But practically none are illegal operators. They are broadcast engineers and electrical engineers. The above statement can't be translated as some of the best RF minds in the world a; /archives//html/Amps/2002-12/msg00064.html (7,874 bytes)
12. [Amps] CBer?? (score: 1): Author: wlfuqu00@uky.edu (wl fuqua); Date: Wed, 04 Dec 2002 10:52:55 -0500; I was raised to obey laws. So when after listing to shortwave for a few years I became interested in becoming a radio operator. Those days you had to have a CB license to operate and to obtain one yo; /archives//html/Amps/2002-12/msg00067.html (9,993 bytes)
13. [Amps] CBer?? (score: 1): Author: wlfuqu00@uky.edu (Bill L. Fuqua); Date: Wed, 04 Dec 2002 23:57:36 -0500; Hi Alex Sandbrand. See you have another name today. If you have forgotten you call is N2NNU 73 Bill wa4lav Well, In contrast with Mr. FuQua, I am quite young... Only 24, you see ... However I had bee; /archives//html/Amps/2002-12/msg00083.html (15,736 bytes)
14. [Amps] CB'ers - what *IS* the problem, anyway??? (score: 1): Author: wlfuqu00@uky.edu (wl fuqua); Date: Fri, 06 Dec 2002 10:45:38 -0500; There is still a difference Ham: Have call signs, identify themselves and do so proudly Have standards of operation and rules that must be followed Have system of monitoring and reporting problems wi; /archives//html/Amps/2002-12/msg00111.html (14,721 bytes)
15. Fwd: Re: [Amps] CB'ers - what *IS* the problem, anyway??? (score: 1): Author: wlfuqu00@uky.edu (Bill Fuqua); Date: Fri, 06 Dec 2002 14:05:25 -0500; To: <amps@contesting.com> In comparison to the class E amplifier builders there are many times QRP builders. Most new hams that do experimentation are doing QRP stuff and enjoy the use of computers a; /archives//html/Amps/2002-12/msg00117.html (13,366 bytes)
16. : [Amps] CB'ers - what *IS* the problem, anyway??? (score: 1): Author: wlfuqu00@uky.edu (Bill Fuqua); Date: Fri, 06 Dec 2002 14:16:26 -0500; To: <amps@contesting.com>; /archives//html/Amps/2002-12/msg00118.html (10,473 bytes)
17. [Amps] CB'ers - what *IS* the problem, anyway??? (score: 1): Author: wlfuqu00@uky.edu (Bill Fuqua); Date: Fri, 06 Dec 2002 15:41:27 -0500; Yes, there are exceptions to the rule. But, you are talking of a small number of hams in the community. A few bad apples do sour the barrel. However, the "illegal CB" operators are all bad apples. 73; /archives//html/Amps/2002-12/msg00124.html (18,124 bytes)
18. [Amps] CB'ers - what *IS* the problem, anyway??? (score: 1): Author: wlfuqu00@uky.edu (Bill Fuqua); Date: Fri, 06 Dec 2002 17:06:36 -0500; Sorry if that bothers you. Too, many think hams are a lazy bunch and confuse us with CBers. If you have knowledge it is best to share it. My ham related class is aimed at younger students. That does; /archives//html/Amps/2002-12/msg00126.html (9,990 bytes)
19. [Amps] Meter Shunts (score: 1): Author: wlfuqu00@uky.edu (Bill Fuqua); Date: Sun, 08 Dec 2002 22:17:13 -0500; The diodes serve another purpose. That is, if the shunt should open the current will flow thru the diode and not allow the negative lead of a high voltage supply go to high voltage. The reason of put; /archives//html/Amps/2002-12/msg00150.html (9,933 bytes)
20. [Amps] K8CPA (score: 1): Author: wlfuqu00@uky.edu (Bill L. Fuqua); Date: Wed, 25 Dec 2002 13:23:28 -0500; I did not get the original email that started this. Please send me a copy of the email dirctly that started this. Two comments of my own. I am a great fan of TenTec. I visit there every year. Look at; /archives//html/Amps/2002-12/msg00292.html (10,050 bytes)

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