Search String: Display: Description: Sort:

Results:

References: [ +from:k7fm@teleport.com: 769 ]

Total 769 documents matching your query.

381. Re: [Amps] Eimac 8560A Tubes (score: 1)
Author: "k7fm" <k7fm@teleport.com>
Date: Sun, 30 Oct 2005 19:27:38 -0800
"I have four (4) Eimac 8560A tubes new old stock in the original boxs that need a home. Don't have a clue as to value other than what some tube guys lists say. Anyone interested? I believe these are
/archives//html/Amps/2005-10/msg00708.html (7,101 bytes)

382. Re: [Amps] SB-220 load capacitor question (score: 1)
Author: Colin Lamb <k7fm@teleport.com>
Date: Thu, 10 Nov 2005 10:56:25 -0800 (GMT-08:00)
The pi-network is really a transformer. So, a change in the output capacitance could be based upon a change in the input characteristics as well as the load. Is the voltage correct? Are both tubes th
/archives//html/Amps/2005-11/msg00127.html (11,338 bytes)

383. Re: [Amps] 220V wiring: Was Question about safety ground connection (score: 1)
Author: Colin Lamb <k7fm@teleport.com>
Date: Thu, 17 Nov 2005 13:29:54 -0800 (GMT-08:00)
Ian asked: "You mean the USA is building homes without glitch resistors?" Response: Not exactly. It seems rather circuitous to use the heaviest house wire you can find to the amp, then use a glitch r
/archives//html/Amps/2005-11/msg00281.html (9,947 bytes)

384. Re: [Amps] 220V wiring: Was Question about safety ground connection (score: 1)
Author: Colin Lamb <k7fm@teleport.com>
Date: Thu, 17 Nov 2005 14:46:54 -0800 (GMT-08:00)
I am often embarassed when, trying to be funny, I propose something outrageous - only to learn that it has already been adopted. I guess the legislators have a more warped sense of humor than I do. O
/archives//html/Amps/2005-11/msg00283.html (10,122 bytes)

385. Re: [Amps] Rf choke (score: 1)
Author: "k7fm" <k7fm@teleport.com>
Date: Mon, 21 Nov 2005 16:45:06 -0800
It has been stated that winding two solenoids rf chokes end-to-end will in effect make one rf choke, so that they must be at right angles. That statement is only true if the rf chokes couple. But, it
/archives//html/Amps/2005-11/msg00416.html (8,665 bytes)

386. Re: [Amps] Rf choke (score: 1)
Author: "k7fm" <k7fm@teleport.com>
Date: Tue, 22 Nov 2005 05:55:30 -0800
" I plan on adding a HV capacitor and relay at the connection point if necessary to switch out ~1/2 of the inductance if necessary. Tomm, KD7QAE" CAUTION. If you switch a capacitor in and out to segm
/archives//html/Amps/2005-11/msg00434.html (8,583 bytes)

387. [Amps] Common Point Grounding (score: 1)
Author: "k7fm" <k7fm@teleport.com>
Date: Tue, 22 Nov 2005 06:37:13 -0800
Grounding each service entrance through a grounding rod can create a ground loop issue. As an alternative, we could adopt a common point grounding, similar to what is used in good power supply constr
/archives//html/Amps/2005-11/msg00437.html (6,869 bytes)

388. Re: [Amps] G3SEK complet kit for sale (score: 1)
Author: "k7fm" <k7fm@teleport.com>
Date: Wed, 23 Nov 2005 12:40:36 -0800
When the new NEC code requires a separate ground wire for the screen grid, does the warranty cover the modification required ? Colin K7FM _______________________________________________ Amps mailing
/archives//html/Amps/2005-11/msg00472.html (7,874 bytes)

389. Re: [Amps] Amp input (score: 1)
Author: "k7fm" <k7fm@teleport.com>
Date: Wed, 23 Nov 2005 15:20:23 -0800
"I have been told that the new ARRL handbook has an amp design which uses a comercial autotuner as the input network for an 3cx1500D7 amp. Could someone tell me if this is true? It sounds like a good
/archives//html/Amps/2005-11/msg00476.html (6,952 bytes)

390. Re: [Amps] Is This 4CX1600B Still Good? (score: 1)
Author: "k7fm" <k7fm@teleport.com>
Date: Thu, 24 Nov 2005 09:14:02 -0800
"I'm not sure, but 2.3 ohms on a cold filament of a tube that size seems a bit high. I've never measured the cold resistance on a 12 volt filament transmitting tube, (only 5 or 7 volt tubes) but it s
/archives//html/Amps/2005-11/msg00483.html (8,681 bytes)

391. [Amps] Testing your rf choke with minimum equipment (score: 1)
Author: "k7fm" <k7fm@teleport.com>
Date: Fri, 25 Nov 2005 17:58:17 -0800
Not having a vector impedance meter, I wondered if there is a quick, cheap and easy way to determine impedance of the rf choke at various frequencies. There may be a way. Let us assume we have an Aut
/archives//html/Amps/2005-11/msg00487.html (9,038 bytes)

392. [Amps] Winding rf chokes quickly - without a lathe (score: 1)
Author: "k7fm" <k7fm@teleport.com>
Date: Fri, 25 Nov 2005 18:50:05 -0800
OK, I am on a roll. Although I have 3 lathes, I am building a separate room /machine shop and my lathes are unavailable for the moment. But, I wanted to wind a quick rf choke to test theory mentioned
/archives//html/Amps/2005-11/msg00488.html (7,136 bytes)

393. Re: [Amps] difference between 2,3,4 and 43, 45, ... materials? (score: 1)
Author: Colin Lamb <k7fm@teleport.com>
Date: Mon, 28 Nov 2005 11:02:07 -0800 (GMT-08:00)
"1. How to confirm that the cable TV system is leaking? (I don't have any sophisticated equipment)." It is pretty simple. If you are interfering, the cable is leaking. No real equipment is needed. Th
/archives//html/Amps/2005-11/msg00506.html (12,447 bytes)

394. Re: [Amps] FL-21200B (score: 1)
Author: "k7fm" <k7fm@teleport.com>
Date: Tue, 6 Dec 2005 06:44:12 -0800
"The resistor most probably did not have a manufacturing defect, so replacing it will likely not solve the underlying problem." Question. Are you saying that if there is a 9.5 ohm resistor that was c
/archives//html/Amps/2005-12/msg00044.html (8,320 bytes)

395. Re: [Amps] 4-250a mounting (score: 1)
Author: "k7fm" <k7fm@teleport.com>
Date: Sun, 25 Dec 2005 13:50:02 -0800
My RCA Transmitting Tubes Technical Manual TT-5 states that the 4-250A/5D22: "may be operated in vertical position only, base up or down." RCA also gives the same operating conditions for the 4-400A
/archives//html/Amps/2005-12/msg00331.html (7,077 bytes)

396. Re: [Amps] Another use for Neon Lamps (score: 1)
Author: "k7fm" <k7fm@teleport.com>
Date: Tue, 3 Jan 2006 06:07:04 -0800
Neon bulbs are for wimps! One of the engineers at the Jim Creek VLF site (1 megawatt) stood under one of the antenna legs far up in the air and held a fluorescent lamp in his hand and it lighted up.
/archives//html/Amps/2006-01/msg00139.html (8,687 bytes)

397. Re: [Amps] Westinghouse BC Ammeter QX-37 (score: 1)
Author: "k7fm" <k7fm@teleport.com>
Date: Mon, 9 Jan 2006 06:46:59 -0800
"In other words, if an amp already meets FCC specs for IMD, what does a five or ten dB improvement get you?" I thought the FCC specs were only that the amplifier be clean enough to stay in the ham ph
/archives//html/Amps/2006-01/msg00263.html (9,101 bytes)

398. Re: [Amps] Westinghouse BC Ammeter QX-37 (score: 1)
Author: Colin Lamb <k7fm@teleport.com>
Date: Mon, 9 Jan 2006 09:41:52 -0800 (GMT-08:00)
Bill said: "I do take exception to the part about "not technically able...". Hams can do anything the commercial boys can do, it's a matter of desire, not ability." Response: No question that many ar
/archives//html/Amps/2006-01/msg00284.html (10,219 bytes)

399. Re: [Amps] Westinghouse BC Ammeter QX-37 (score: 1)
Author: Colin Lamb <k7fm@teleport.com>
Date: Mon, 9 Jan 2006 10:18:45 -0800 (GMT-08:00)
"My objection was to your all-inclusive comment. Had you said "some amateurs..." I would have been silent. Bill, W6WRT" My original post was intended to comment on how the FCC viewed us, rather on th
/archives//html/Amps/2006-01/msg00288.html (9,935 bytes)

400. [Amps] Components Causing Distortion in Amplifiers (score: 1)
Author: "k7fm" <k7fm@teleport.com>
Date: Mon, 9 Jan 2006 20:24:28 -0800
Someone asked whether components such as capacitors can cause distortion in linear amplifiers. Somehow the e-mail got side-tracked, but I have some comments in response. The response is not quite on
/archives//html/Amps/2006-01/msg00310.html (9,385 bytes)

Current List: 381 - 400
Page: [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20]
This search system is powered by Namazu