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Best way to tap power for 9v reverb?

Started by joecool85, January 24, 2020, 08:27:26 PM

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joecool85

I'm thinking about adding reverb to my K20-X and rather than build out the circuit as the K30RX (they share the same board), I'm thinking of using a Belton brick.  This would require 9v DC to supply it.  I'm leaning towards simply attaching a basic 7809 regulator to the positive line of the +/-18v PSU output.  I know that technically this would draw a few ma off that end of the PSU potentially making it unbalanced, but I can't image it would be an issue.  So, what do you guys think?
Life is what you make it.
Still rockin' the Dean Markley K-20X
thatraymond.com

g1

Sometimes the + side of split supply is already used more than the (-) side.  Is it possible to use the (-) side instead? 
Might help keep balance, but possibly not significant imbalance anyway.

joecool85

#2
I don't believe the + side is getting any more load than the - side.  I know both sides measure identical voltage, so there is no sag on that side anyway.  I've attached the schematic in case this helps.
Life is what you make it.
Still rockin' the Dean Markley K-20X
thatraymond.com

g1

Should be no problem using the + side then.