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Hoffman Amplifiers > Other Stuff > Effects (Moderators: Geezer, tubenit, PRR, sluckey) > Power supply for stomp boxes
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12bz7
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« on: October 21, 2007, 05:35:37 am »
Someone sent me a layout for a power supply a long time ago using a tran with 24v secondary. Would this circuit still work the same with only a 12v secondary or would something in the circuit need to be changed?
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sluckey
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« Reply #1 on: October 21, 2007, 09:59:43 am »
12 transformer will work.
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12bz7
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« Reply #2 on: October 21, 2007, 12:20:44 pm »
Thanks Sluckey, I'll give it a go ;D
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12bz7
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« Reply #3 on: October 23, 2007, 08:36:01 am »
O.K I built this unit using a 6.3-0-6.3 trans (taped off the CT). Measured 14.95v on the secondaries of the tran. The end result is 8.8vdc. Is this enough for most pedals or should I aim for 9 - 9.5v by playing with resistor values? I'm not very experienced with pedals and their voltage requirements. Does voltage affect tone at all with pedals?  :-?
Thanks again
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sluckey
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« Reply #4 on: October 23, 2007, 09:24:09 am »
Quote
O.K I built this unit using a 6.3-0-6.3 trans (taped off the CT). Measured 14.95v on the secondaries of the tran. The end result is 8.8vdc. Is this enough for most pedals or should I aim for 9 - 9.5v by playing with resistor values?
8.8 sounds good to me.

Quote
I'm not very experienced with pedals and their voltage requirements. Does voltage affect tone at all with pedals?
   
Some say so, moreso with older analog pedals. Back in the '70s I used to think my old Crybaby sounded sweeter after midnight when my battery had drained a bit. Coulda been the Miller effect though!
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12bz7
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« Reply #5 on: October 23, 2007, 09:38:25 am »
 Coulda been the Miller effect though![/quote]  ;D ;D ;D ;D ;D

Thanks
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