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Total 13 documents matching your query.

1. [AMPS] filament rheostats (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Mon, 21 Feb 2000 10:57:33 -0000; I guess they don't because of number 1, cost, and number 2, the capability of allowing people to wind up the volts - 'gee, Wilma, you get more output'. Better, but even more expensive, is a regulated; /archives//html/Amps/2000-02/msg00412.html (8,383 bytes)
2. [AMPS] filament rheostats (score: 1): Author: MM@plextek.co.uk (Mark Marsden); Date: Mon, 21 Feb 2000 16:23:45 +0000; butts means capability output'. current, thing Heaters are soft-started with a motor-diriven variac, or get a step-start supply, but has anybody seen or tried slow starting a heater using a triac an; /archives//html/Amps/2000-02/msg00419.html (10,368 bytes)
3. [AMPS] filament rheostats (score: 1): Author: lomax1@prodigy.net (Frank & Barb Ayers); Date: Mon, 21 Feb 2000 11:57:20 -0500; I've thought of doing this but - is there any problem with running filaments on DC? Seems to me I heard at one time that some tube manufacturers recommended against that. Frank W2FCA -- FAQ on WWW: h; /archives//html/Amps/2000-02/msg00422.html (8,257 bytes)
4. [AMPS] filament rheostats (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Mon, 21 Feb 2000 17:11:26 -0000; filaments I'd heard some story about it possibly leading to filament failures because of electrolysis, but I can't find anyone who can give chapter and verse. G6JP, who actually worked manufacturing; /archives//html/Amps/2000-02/msg00424.html (9,264 bytes)
5. [AMPS] filament rheostats (score: 1): Author: nj4f@erols.com (Steve Bookout); Date: Mon, 21 Feb 2000 12:13:55 -0500; Hello Frank and all, 73 de Steve, NR4M -- Steve Bookout, NR4M (ex NJ4F) Rapidan Data Systems 'DX4WIN...The way logging programs should be!' Free demo at http://www.erols.com/pvander -- FAQ on WWW: ht; /archives//html/Amps/2000-02/msg00425.html (9,694 bytes)
6. [AMPS] filament rheostats (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Mon, 21 Feb 2000 18:08:39 -0000; I believe there's a limit on all filament type tubes, but it may be that manufacturers figure that only on the ones for ham use do you have to stress the point. In the days of tubed TV receivers here; /archives//html/Amps/2000-02/msg00432.html (9,459 bytes)
7. [AMPS] filament rheostats (score: 1): Author: n5ar@freewwweb.com (n5ar); Date: Mon, 21 Feb 2000 11:12:33 -0800; I have been using the Triac soft start wall switch unit as the filament switch in an amp which used 4-1000 and later an 8877 for 15 years with no problems. I am surprised that more people aren't doin; /archives//html/Amps/2000-02/msg00436.html (10,122 bytes)
8. [AMPS] filament rheostats (score: 1): Author: n5ar@freewwweb.com (n5ar); Date: Mon, 21 Feb 2000 11:34:54 -0800; Mine came from a Dallas flea mkt but I see them at Eagle/Home Depot. I am talking about the kind that mount in a wall switch box for dimming lights. Mine has a rotary pot with a switch on it just lik; /archives//html/Amps/2000-02/msg00440.html (8,224 bytes)
9. [AMPS] filament rheostats (score: 1): Author: measures@vcnet.com (measures); Date: Mon, 21 Feb 2000 09:51:19 -0700; The current cost of 25w rheostats in the Mouser Catalogue is minimal. // I received one e-mail from a chap in a country where electric-mains potential varies from c. 95 v to 125v. output'. No furthe; /archives//html/Amps/2000-02/msg00450.html (9,134 bytes)
10. [AMPS] filament rheostats (score: 1): Author: RichyRusso@aol.com (RichyRusso@aol.com); Date: Mon, 21 Feb 2000 23:21:02 EST; While we are on this topic, I am looking for a filament transformer for my Project, I need one thats good for my 3cx800a7 retrofit, any suggestions??.. Tnx Richy -- FAQ on WWW: http://www.contesting.; /archives//html/Amps/2000-02/msg00464.html (8,046 bytes)
11. [AMPS] filament rheostats (score: 1): Author: 2@vc.net (measures); Date: Mon, 21 Feb 2000 23:28:15 -0700; Heaters are a different ballgame than filaments. The typical filament has 1/8.33 as much R when cold as when hot. This is assuredly not the case with heater types. I know of no Eimac heater type tub; /archives//html/Amps/2000-02/msg00468.html (9,145 bytes)
12. [AMPS] filament rheostats (score: 1): Author: 2@vc.net (measures); Date: Mon, 21 Feb 2000 23:28:17 -0700; A problem is that because of the non-sinusoidal waveshape, only a true RMS voltmeter will accurately measure fil. volts. Also, the 4-1000A and 8877 specs do not indicate a requirement to limit inrus; /archives//html/Amps/2000-02/msg00469.html (10,884 bytes)
13. [AMPS] filament rheostats (score: 1): Author: 2@vc.net (measures); Date: Mon, 21 Feb 2000 23:28:21 -0700; The 3-400Z and 3-500Z have no midpoint fil.-helices support This makes them vulnerable Your "wind up" story does not hold water. Good point Yea, verily . cheers, Peter -- FAQ on WWW: http://www.cont; /archives//html/Amps/2000-02/msg00473.html (9,447 bytes)

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