PS questions?

Hilly-wa · 17th October 2008, 12:39 AM

My power transformer runs at 120-degrees-F. Too hot? The EI stack is 1-1/2 x 3 x 3-1/2 inches. The transformer is 170-0-170 and 6.3, and I'm drawing 30 ma through each channel and less than 1 A total, for the heaters.

Second question: Can I use a 250-0-250 transformer and two SS bridges as if it were two 250-0 transformers? Center tap and one leg to left channel bridge, and same center tap and other leg to right channel bridge? Or do the two bridges form a short circuit across the transformer? If it does work, do I keep the ground legs of the bridges separate, or tie them together?

I'm never afraid to let on how little I know.

Ed

zigzagflux · 17th October 2008, 04:04 AM

120 F sounds pretty cool to me. If you can keep your hand on the core, it's a cool running tranny.

Typically, I have found the ability to keep my hand on for no more than a few seconds, and get years and years of life out of them.

Akita · 17th October 2008, 06:08 AM

Answer to your second question

I dont think so, You need to seprate the 0v winding so that it is not shorted. Then only you have 2 set of winding which give you 250v-0, 250v-0.

17th October 2008, 12:39 AM	#1
Hilly-wa diyAudio Member Join Date: Feb 2005 Location: Virginia	PS questions? My power transformer runs at 120-degrees-F. Too hot? The EI stack is 1-1/2 x 3 x 3-1/2 inches. The transformer is 170-0-170 and 6.3, and I'm drawing 30 ma through each channel and less than 1 A total, for the heaters. Second question: Can I use a 250-0-250 transformer and two SS bridges as if it were two 250-0 transformers? Center tap and one leg to left channel bridge, and same center tap and other leg to right channel bridge? Or do the two bridges form a short circuit across the transformer? If it does work, do I keep the ground legs of the bridges separate, or tie them together? I'm never afraid to let on how little I know. Ed __________________ Hilly-wa

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17th October 2008, 04:04 AM	#2
zigzagflux diyAudio Member Join Date: Oct 2006	120 F sounds pretty cool to me. If you can keep your hand on the core, it's a cool running tranny. Typically, I have found the ability to keep my hand on for no more than a few seconds, and get years and years of life out of them.

17th October 2008, 06:08 AM	#3
Akita diyAudio Member Join Date: Dec 2006 Location: Kuala Lumpur	Answer to your second question I dont think so, You need to seprate the 0v winding so that it is not shorted. Then only you have 2 set of winding which give you 250v-0, 250v-0.

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