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February 19, 2020, 09:51:47 PM

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Author Topic: Best way to tap power for 9v reverb?  (Read 180 times)

joecool85

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Best way to tap power for 9v reverb?
« on: January 24, 2020, 08:27:26 PM »
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?
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g1

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Re: Best way to tap power for 9v reverb?
« Reply #1 on: January 25, 2020, 12:30:37 PM »
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

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Re: Best way to tap power for 9v reverb?
« Reply #2 on: January 25, 2020, 07:59:29 PM »
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.
« Last Edit: January 25, 2020, 08:11:42 PM by joecool85 »
Life is what you make it.
Still rockin' the Dean Markley K-20X
"New" amp: Fender Frontman 25 DSP (FM25DSP)
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g1

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Re: Best way to tap power for 9v reverb?
« Reply #3 on: January 26, 2020, 12:31:30 PM »
Should be no problem using the + side then.