In Reply to: Re: Using larger power transformers in low power-draw source components posted by andyr on June 21, 2004 at 14:06:25:
What you may wish to do here is reinstall your 30VA transformer and use a variac to adjust the AC line. Set the variac to 120vrms, verify this with a meter and then read the voltage on the unregulated section of power supply at the 680uf supply caps. At 120 vrms with your 30 VA transformers your should read about 21 volts DC. If you read something else..... than we need to explore further. I think one of your "assumptions" on this circuit may not be what you think it is.
d.b.
P.S. with the kind of current draw you describe; I would think about using 2,200uf.
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Follow Ups
- Re: Using larger power transformers in low power-draw source components - Dan Banquer 15:50:08 06/21/04 (8)
- Re: Using larger power transformers in low power-draw source components - andyr 16:07:34 06/21/04 (7)
- Re: Using larger power transformers in low power-draw source components - Dan Banquer 17:45:53 06/21/04 (6)
- Re: Using larger power transformers in low power-draw source components - andyr 19:24:59 06/21/04 (5)
- You might also try other types of transformers - Commuteman 13:50:29 06/22/04 (4)
- Good suggestion - Sean 00:18:46 06/23/04 (2)
- Shirley that's the whole point of this and the other AA Forums?? - andyr 02:25:20 06/23/04 (1)
- Re: Don't call him Shirley !!!!!! NT - slope 08:30:27 06/23/04 (0)
- Thanks, Peter, I will investigate. (nt) - andyr 14:04:39 06/22/04 (0)