Author Topic: Rhodes Peterson preamp powering  (Read 48 times)

Offline kidbill

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Rhodes Peterson preamp powering
« on: February 09, 2019, 10:53:16 AM »
Hi Rhodes lovers
would you know how many milliamperes needs the peterson preamp?
I know it needs 25vdc but don't how much ma
Thank you!

Offline sean

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Re: Rhodes Peterson preamp powering
« Reply #1 on: February 09, 2019, 06:36:24 PM »
I wish I had a Peterson preamp to test with.

Using the circuit at http://www.fenderrhodes.com/org/ch11/fig11-8.jpg as our reference, I think the circuit will draw much less than 300mA from a 25V supply.  Most of that current is to light the bulbs.  I think the rest of the circuit will draw about 30mA.

A 24V supply will work just fine with this preamp.

Lots of power supplies to choose from.  These two are only ten bucks (plus shipping):  The Mean Well MFM-10-24 or Recom RAC10-24SK/277.

If you don't want to deal with mounting those on veroboard, you could just get the $7.70 Mean Well RS-15-24 with screw terminal strip connections.  That one can be easily adjusted up to 25V if you feel like it.  https://www.mouser.com/ProductDetail/MEAN-WELL/RS-15-24?qs=sGAEpiMZZMsPs3th5F8koBFO1FnQkaDCUHGsdtbrlqs%3d

If you want a wall-wart, try CUI SWI15-24-N-P5 or Triad WSU240-0500.  Both are cheap.

Sean