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Total 9 documents matching your query.

1. [Amps] operating a transformer in oil (score: 1): Author: "jeremy-ca" <km1h@jeremy.mv.com>; Date: Sat, 10 Nov 2007 10:22:20 -0500; Has anyone tried extending the power capability by placing one in oil? Im aware of the flux density, core size and all that but just curious how much leeway there is. Right now Im contemplating 500W; /archives//html/Amps/2007-11/msg00128.html (6,960 bytes)
2. Re: [Amps] operating a transformer in oil (score: 1): Author: David G4FTC <g4ftc@hotmail.com>; Date: Sat, 10 Nov 2007 17:49:51 +0000; The flux density is set by the excitation voltage and not load current - if you are running the transformer from the correct supply voltage, the flux density will be OK. What you will get is increas; /archives//html/Amps/2007-11/msg00135.html (7,607 bytes)
3. Re: [Amps] operating a transformer in oil (score: 1): Author: "Roger" <sub1@rogerhalstead.com>; Date: Sat, 10 Nov 2007 14:41:51 -0500; I've not tried it with small transformers but it should work. How much would be gained is another matter. Normal transformers should run into I^2R loss problems well before they even approach satura; /archives//html/Amps/2007-11/msg00136.html (10,075 bytes)
4. Re: [Amps] operating a transformer in oil (score: 1): Author: David G4FTC <g4ftc@hotmail.com>; Date: Sun, 11 Nov 2007 07:50:02 +0000; you are running the transformer from the correct supply voltage, the flux density will be OK. higher load current - this will result in increased temperatures and it is this which can ruin the trans; /archives//html/Amps/2007-11/msg00139.html (8,521 bytes)
5. [Amps] operating a transformer in oil (score: 1): Author: Peter Chadwick <g3rzp@g3rzp.wanadoo.co.uk>; Date: Sun, 11 Nov 2007 10:29:58 +0100 (CET); You probably need to use a choke feed so that there isn't any DC through the transformer 73 Peter G3RZP _______________________________________________ Amps mailing list Amps@contesting.com http://li; /archives//html/Amps/2007-11/msg00140.html (7,227 bytes)
6. Re: [Amps] operating a transformer in oil (score: 1): Author: "jeremy-ca" <km1h@jeremy.mv.com>; Date: Sun, 11 Nov 2007 07:53:21 -0500; Ive seen mention of that method Peter but how do you calculate the choke value? Carl KM1H _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting; /archives//html/Amps/2007-11/msg00142.html (7,933 bytes)
7. Re: [Amps] operating a transformer in oil (score: 1): Author: "jeremy-ca" <km1h@jeremy.mv.com>; Date: Sun, 11 Nov 2007 08:04:00 -0500; It certainly does complicate things. Modulation transformers are constructed differently also so they can function with that DC in both windings. Im going to have to dig out my ancient Terman and oth; /archives//html/Amps/2007-11/msg00143.html (10,335 bytes)
8. Re: [Amps] operating a transformer in oil (score: 1): Author: Manfred Mornhinweg <mmornhin@gmx.net>; Date: Sun, 11 Nov 2007 13:03:05 +0000; Hi Carl, I have not yet, but might try it soon, with some 10kW power transformers. I'm just trying to learn enough about dissipation in oil to find out how much copper and steel I would save by using; /archives//html/Amps/2007-11/msg00146.html (9,542 bytes)
9. Re: [Amps] operating a transformer in oil (score: 1): Author: Peter Chadwick <g3rzp@g3rzp.wanadoo.co.uk>; Date: Mon, 12 Nov 2007 11:57:38 +0100 (CET); value?< I don't know, but I would work on the basis that the choke should offer 10 times the impedance of the PA at the lowest modulating frequency. So a 10Henry choke offering 18k ohms in the DC fe; /archives//html/Amps/2007-11/msg00159.html (8,231 bytes)

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