High/Low Voltage switch

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Robert
Posts: 193
Joined: Sat May 21, 2005 11:47 am
Location: KS

High/Low Voltage switch

Post by Robert »

I'm interested in utilizing a High/Low power switch to take advantage of the two diferent voltage taps on my Two Rock power transformer (similar to the Heyboer PT with a 300v and 260v taps). KF talks about this aspect of his transformers in the GP voltages article in the Files archive here. Is it as simple as using an On-Off-On power switch? What implications, if any will this have for the circuit, tubes? I hope it will provide some sonic difference and increased sag.

Robert
ampdoc1
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Joined: Sat Feb 26, 2005 12:42 am
Location: Tulsa, Oklahoma

Re: High/Low Voltage switch

Post by ampdoc1 »

Robert,

Probably the easiest way to implement this is to use a DPDT on-on switch between the transformer secondaries and the rectifier diodes. One position is hi, the other low. Get a good 15-20 AMP switch.


DEH
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Omar
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Joined: Sun Jan 09, 2005 6:50 am
Location: Cleveland, OH
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Re: High/Low Voltage switch

Post by Omar »

Robert
I put a switch on my amp to switch b/w the two B+ taps. I use the lower voltage setting when running 6V6's and I find the lower setting has less head room. It's more "brown" sounding. Almost too crunchy. I usually leave it on the higher B+ setting since it's more dynamic.

ampdoc is right - make sure to use a 15-20 amp switch.

Omar
Tone by misadventure
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