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In Reply to: Phono preamp supplies du jour. Saving money. Maximizing convenience. posted by Ugly on October 6, 2014 at 20:45:41:
The little ∿ on the back of the 651P power input jack is a sine wave. That means you have to input 12 volts AC, not 12 volts DC. The rectification to DC is done internally. Using the wrong supply may have caused serious damage to your Cambridge phono stage.If you're looking for an improvement, get yourself a high current transformer that outputs 12 volts AC. The lower impedance of the big transformer will give you improved sonics, according to Paul McGowan of PS Audio.
If it were me, the next thing I'd be looking at would be to upgrade the voltage regulator(s). I've had excellent results with a Belleson SuperPower regulator in my Graham Slee Reflex phono stage.
Edits: 10/07/14
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Follow Ups
- Ugly, it's a good thing you asked ahead of time - 1973shovel 10:23:36 10/07/14 (19)
- RE: Ugly, it's a good thing you asked ahead of time - Caucasian Blackplate 22:52:23 10/08/14 (13)
- RE: "no harm will be done by throwing DC at it." - 1973shovel 15:59:39 10/10/14 (0)
- RE: Ugly, it's a good thing you asked ahead of time - Ugly 06:34:43 10/09/14 (11)
- RE: Ugly, it's a good thing you asked ahead of time - Caucasian Blackplate 16:48:26 10/10/14 (3)
- RE: Ugly, it's a good thing you asked ahead of time - Ugly 21:39:23 10/10/14 (2)
- RE: Ugly, it's a good thing you asked ahead of time - jedrider 07:49:06 10/11/14 (1)
- RE: Ugly, it's a good thing you asked ahead of time - Ugly 08:58:54 10/11/14 (0)
- RE: Ugly, it's a good thing you asked ahead of time - jedrider 07:04:17 10/09/14 (6)
- RE: Ugly, it's a good thing you asked ahead of time - Ugly 21:17:04 10/09/14 (5)
- RE: Ugly, it's a good thing you asked ahead of time - jedrider 07:29:50 10/10/14 (4)
- RE: Ugly, it's a good thing you asked ahead of time - Ugly 08:38:19 10/10/14 (3)
- RE: Ugly, it's a good thing you asked ahead of time - jedrider 09:17:10 10/10/14 (2)
- Please see my new post above to CBP. It addresses some of your points. -t - Ugly 21:59:33 10/10/14 (1)
- RE: Please see my new post above to CBP. It addresses some of your points. -t - jedrider 10:14:34 10/11/14 (0)
- RE: Ugly, it's a good thing you asked ahead of time - Ugly 11:10:51 10/07/14 (4)
- RE: Ugly, it's a good thing you asked ahead of time - jedrider 05:32:16 10/08/14 (1)
- RE: Ugly, it's a good thing you asked ahead of time - Ugly 06:38:43 10/08/14 (0)
- It sounds like you have it well in hand. Good luck. (nt) - 1973shovel 04:43:56 10/08/14 (1)
- I hope so. Thanks! -t - Ugly 06:43:24 10/08/14 (0)