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Total 21 documents matching your query.

1. [Amps] Parasitic suppressor resistor (score: 1): Author: Bill Turner <dezrat1242@ispwest.com>; Date: Sun, 01 Jan 2006 12:37:14 -0800; What do you think of this for a parasitic suppressor resistor? http://members.ispwest.com/dezrat1242/pr.jpg No more burn-outs ever! Anyone ever use one? 73, Bill W6WRT _______________________________; /archives//html/Amps/2006-01/msg00015.html (6,351 bytes)
2. Re: [Amps] Parasitic suppressor resistor (score: 1): Author: gdaught6@stanford.edu; Date: Sun, 01 Jan 2006 14:10:12 -0800; It's pretty much perfect for a grid resistor for a medium-sized tetrode. 73, George T. Daughters, K6GT _______________________________________________ Amps mailing list Amps@contesting.com http://lis; /archives//html/Amps/2006-01/msg00018.html (7,393 bytes)
3. Re: [Amps] Parasitic suppressor resistor (score: 1): Author: Bill Turner <dezrat1242@ispwest.com>; Date: Sun, 01 Jan 2006 14:27:24 -0800; ORIGINAL MESSAGE: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Actually, that's what I bought it for originally but later changed my mind toward a triode (8877), which is almost finished by the; /archives//html/Amps/2006-01/msg00020.html (7,692 bytes)
4. Re: [Amps] Parasitic suppressor resistor (score: 1): Author: "Phil Clements" <philc@texascellnet.com>; Date: Sun, 1 Jan 2006 17:21:48 -0600; A suppressor made by Eimac-Varian for their 4-1000A is 2 turns 1/4 inch silver-plated tubing 1 inch in diameter over a 120 ohm Globar resistor about two inches long; not as big as the one you pictur; /archives//html/Amps/2006-01/msg00025.html (7,939 bytes)
5. Re: [Amps] Parasitic suppressor resistor (score: 1): Author: Bill Aycock <baycock@direcway.com>; Date: Sun, 01 Jan 2006 18:14:07 -0600; That's a standard MFJ dummy load resistor, probably from a 300Watt Tuner. I use one fairly often. Bill-W4BSG -- Bill Aycock W4BSG Woodville, Alabama _______________________________________________ Am; /archives//html/Amps/2006-01/msg00029.html (8,307 bytes)
6. Re: [Amps] Parasitic suppressor resistor (score: 1): Author: Bill Turner <dezrat1242@ispwest.com>; Date: Sun, 01 Jan 2006 17:37:23 -0800; ORIGINAL MESSAGE: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ It says "1500" on it and I assume that's the power rating. When you say "I use one fairly often", do you mean as a parasitic suppre; /archives//html/Amps/2006-01/msg00036.html (8,281 bytes)
7. Re: [Amps] Parasitic suppressor resistor (score: 1): Author: Bill Turner <dezrat1242@ispwest.com>; Date: Sun, 01 Jan 2006 17:49:20 -0800; ORIGINAL MESSAGE: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ I thought about that, but the L would be there anyway. The 8877 sits low on the chassis and the top of the plate choke is six inche; /archives//html/Amps/2006-01/msg00038.html (8,098 bytes)
8. Re: [Amps] Parasitic suppressor resistor (score: 1): Author: Steve Thompson <g8gsq@eltac.co.uk>; Date: Mon, 02 Jan 2006 09:04:55 +0000; Having the L in the resistor is different from having it in series with the resistor/inductor suppressor. Whether the difference matters is unique to your amplifier and its gain/phase characteristics; /archives//html/Amps/2006-01/msg00045.html (8,913 bytes)
9. Re: [Amps] Parasitic suppressor resistor (score: 1): Author: R.Measures <r@somis.org>; Date: Mon, 2 Jan 2006 03:41:43 -0800; The distance is not as important as providing two paths of differing L through the VHF suppressor in order to provide a low Q at the anode's parasite frequency. note - Low-Q is good in a VHF suppress; /archives//html/Amps/2006-01/msg00052.html (9,359 bytes)
10. Re: [Amps] Parasitic suppressor resistor (score: 1): Author: R.Measures <r@somis.org>; Date: Mon, 2 Jan 2006 04:05:16 -0800; According to a Ham who telephoned me during the grate parasite debate, who uses a computer program to design commercial amplifiers, the 8877 (C-fb = 0.1pF) does not need a parasitic suppressor if the; /archives//html/Amps/2006-01/msg00053.html (10,365 bytes)
11. Re: [Amps] Parasitic suppressor resistor (score: 1): Author: Bill Aycock <baycock@direcway.com>; Date: Mon, 02 Jan 2006 07:21:42 -0600; Bill- Since it is a dummy load, what I meant was that I use it fairly often *as a dummy load*. I find it a help when setting drive for PSK31 and similar digital modes where it is polite to minimize d; /archives//html/Amps/2006-01/msg00057.html (9,272 bytes)
12. Re: [Amps] Parasitic suppressor resistor (score: 1): Author: R.Measures <r@somis.org>; Date: Mon, 2 Jan 2006 06:03:14 -0800; Especially with a resistor that was designed to dissipate 50 w in free air. Richard L. Measures, AG6K, 805.386.3734. www.somis.org _______________________________________________ Amps mailing list Am; /archives//html/Amps/2006-01/msg00062.html (10,150 bytes)
13. Re: [Amps] Parasitic suppressor resistor (score: 1): Author: Bill Turner <dezrat1242@ispwest.com>; Date: Mon, 02 Jan 2006 06:32:56 -0800; ORIGINAL MESSAGE: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ I'm sure this resistor was intended to be used in an oil filled container. In free air, it would be fried pretty quickly. 73, Bill; /archives//html/Amps/2006-01/msg00064.html (8,643 bytes)
14. Re: [Amps] Parasitic suppressor resistor (score: 1): Author: Bill Turner <dezrat1242@ispwest.com>; Date: Mon, 02 Jan 2006 06:40:33 -0800; ORIGINAL MESSAGE: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Yes I do, and I plan to use it when the tank circuit is in place. I have read your series of articles on amp design. Very informati; /archives//html/Amps/2006-01/msg00066.html (9,306 bytes)
15. Re: [Amps] Parasitic suppressor resistor (score: 1): Author: Peter Chadwick <g3rzp@g3rzp.wanadoo.co.uk>; Date: Mon, 2 Jan 2006 16:01:36 +0100 (CET); I've seen that size used for 30kW loads: it was in a special fitting, and had something like 300 gallons an hour of cooling water pumped over it. That's 5 gallons a minute - and these were imperial g; /archives//html/Amps/2006-01/msg00068.html (8,524 bytes)
16. Re: [Amps] Parasitic suppressor resistor (score: 1): Author: Steve Thompson <g8gsq@eltac.co.uk>; Date: Mon, 02 Jan 2006 15:53:05 +0000; Did he (or she) indicate whether the grid grounding and/or cathode impedance made any difference? Steve _______________________________________________ Amps mailing list Amps@contesting.com http://li; /archives//html/Amps/2006-01/msg00072.html (9,832 bytes)
17. Re: [Amps] Parasitic suppressor resistor (score: 1): Author: R.Measures <r@somis.org>; Date: Mon, 2 Jan 2006 08:47:31 -0800; it was a dude. Wimmen is too dam stuped to know much about RF. I don't think there was an entry field for grid grounding L. Cathode Z is fixed at c. 54-ohms, however, the Z of the cathode-ground path; /archives//html/Amps/2006-01/msg00078.html (10,803 bytes)
18. Re: [Amps] Parasitic suppressor resistor (score: 1): Author: Steve Thompson <g8gsq@eltac.co.uk>; Date: Mon, 02 Jan 2006 18:19:02 +0000; I can't help but think that a low inductance Xc=5-10 ohms from cathode to ground would make a big difference to the calculation. Cutting the loop gain by 7-10dB is a good recipe for better stability.; /archives//html/Amps/2006-01/msg00086.html (11,158 bytes)
19. Re: [Amps] Parasitic suppressor resistor (score: 1): Author: Bill Turner <dezrat1242@ispwest.com>; Date: Mon, 02 Jan 2006 10:28:07 -0800; ORIGINAL MESSAGE: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ You must have a comfortable couch. :-) 73, Bill W6WRT _______________________________________________ Amps mailing list Amps@contes; /archives//html/Amps/2006-01/msg00087.html (9,794 bytes)
20. Re: [Amps] Parasitic suppressor resistor (score: 1): Author: Bill Turner <dezrat1242@ispwest.com>; Date: Mon, 02 Jan 2006 10:46:10 -0800; ORIGINAL MESSAGE: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ I wonder about this too. In my amp, I have a low-Q parallel resonant tank circuit on each band from cathode to ground. Q of about 2; /archives//html/Amps/2006-01/msg00091.html (10,367 bytes)

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