Mail Archive Search: <+subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[Amps\]\s+Switching\s+Power\s+Supplies\s*$/>

Results:

References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[Amps\]\s+Switching\s+Power\s+Supplies\s*$/: 31 ]

Total 31 documents matching your query.

21. Re: [Amps] Switching Power Supplies (score: 1): Author: Joe Isabella <n3ji@yahoo.com>; Date: Fri, 14 Jul 2006 18:22:53 -0700 (PDT); Why don't you ask these folks: http://www.wattsunlimited.com/ Surely one of you have disected this thing already. No, it's not a good supply for a "tube with handles", but it's pretty cool for what i; /archives//html/Amps/2006-07/msg00403.html (9,630 bytes)
22. Re: [Amps] Switching Power Supplies (score: 1): Author: "Tom W8JI" <w8ji@w8ji.com>; Date: Fri, 14 Jul 2006 21:48:54 -0400; 17% no load to full load regulation isn't so hot Joe. I'm not sure how that would be for IM products or CW waveform since power out is generally about the square of supply voltage change. The CW wav; /archives//html/Amps/2006-07/msg00404.html (9,668 bytes)
23. Re: [Amps] Switching Power Supplies (score: 1): Author: "Tom W8JI" <w8ji@w8ji.com>; Date: Fri, 14 Jul 2006 21:53:48 -0400; The cool down time is about the same as the warm up time Ian, momentary sags wouldn't hurt a thing. Personally, I'd use a constant voltage transformer if it was that big of a deal. If I used a switc; /archives//html/Amps/2006-07/msg00405.html (8,862 bytes)
24. Re: [Amps] Switching Power Supplies (score: 1): Author: David Smith <vk3hz@wia.org.au>; Date: Sat, 15 Jul 2006 11:25:09 +1000; I use a switching supply to run the filament of a GS35b in a 70cm amp for several reasons: 1. The filament volts should be backed off a little to allow for additional heating due to back-bombardment; /archives//html/Amps/2006-07/msg00406.html (8,027 bytes)
25. Re: [Amps] Switching Power Supplies (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Fri, 14 Jul 2006 23:01:06 -0400; See below; ** REPLY SEPARATOR ** The Heathkit 220 and a few other models had around 15% regulation which is right on the edge of saturation (they ran a high flux density to save on weight and cost).; /archives//html/Amps/2006-07/msg00407.html (10,783 bytes)
26. Re: [Amps] Switching Power Supplies (score: 1): Author: Tony King - W4ZT <amps080605@w4zt.com>; Date: Sat, 15 Jul 2006 01:15:14 -0400; I agree with everything you've said here Tom but that doesn't dissuade me from using the switcher on my indirectly heated filament on the Russian GS-35B triodes. As you stated before, price can be a; /archives//html/Amps/2006-07/msg00410.html (11,468 bytes)
27. Re: [Amps] Switching Power Supplies (score: 1): Author: Steve Thompson <g8gsq@eltac.co.uk>; Date: Sat, 15 Jul 2006 07:48:06 +0100; For what I have in mind, the heater supply will come from the secondary of a fully isolated transformer. 5kV insulation is easy to achieve and fault current shouldn't flow through the heater. I don't; /archives//html/Amps/2006-07/msg00413.html (9,809 bytes)
28. Re: [Amps] Switching Power Supplies (score: 1): Author: Steve Thompson <g8gsq@eltac.co.uk>; Date: Sat, 15 Jul 2006 08:04:08 +0100; Yes - terminology used about directly and indirectly heated cathodes, heaters and filaments varies both within and across continents. Given my interest in vintage wireless, I think of 813s, 3-500s et; /archives//html/Amps/2006-07/msg00414.html (8,827 bytes)
29. Re: [Amps] Switching Power Supplies (score: 1): Author: Ian White GM3SEK <gm3sek@ifwtech.co.uk>; Date: Sat, 15 Jul 2006 11:22:43 +0100; Indirectly heated cathodes do have some thermal inertia which tends to keep the temperature more constant... but the scenarios I've experienced have involved sags in line voltage that were a lot more; /archives//html/Amps/2006-07/msg00415.html (10,929 bytes)
30. Re: [Amps] Switching Power Supplies (score: 1): Author: "Harold Mandel" <ka1xo@juno.com>; Date: Sun, 16 Jul 2006 12:02:48 -0400; Dear Steve, You raise a very good point in your question about what happens to a switching P/S in an arc situation. In a Class A power supply (ferroresonant, etc., ) there's a chance the filter cap(s; /archives//html/Amps/2006-07/msg00449.html (11,281 bytes)
31. Re: [Amps] Switching Power Supplies (score: 1): Author: Steve Thompson <g8gsq@eltac.co.uk>; Date: Sun, 16 Jul 2006 23:00:15 +0100; Hi Hal. I understand all the points you make - for sure anything with semiconductors in it has to be potentially more fragile than a simple mains transformer, but I think it also depends on situation; /archives//html/Amps/2006-07/msg00454.html (12,788 bytes)

Current List: 21 - 31
Page: [1] [2]