What's the best way to get 9V and 18V from one box?

Frequently asked questions regarding powering your pedal.
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Mr. SD-1
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Post by Mr. SD-1 »

I am building a simple pedal board consisting of one TS-9 Tube Screamer and one AD-80 Analog Delay. The TS-9 requires 9VDC while the AD-80 requires 18VDC. My wall voltage is 120VAC and I would like to build a single power supply box to feed both pedals. What is the best way to accomplish this?

I am thinking about using a Hammond 164H20 (115VAC to 20V CT @ 1A), then full wave rectifier, big filter cap, then split to a 7818 and 7809.

A few years ago, I successfully built a simple regulated power supply with three parallel 9VDC outlets. It works great with my Boss pedals. Need something for these Ibanez guys now : )

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Mr. SD-1
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Post by Mr. SD-1 »

Just realized the transformer is rated in RMS volts, so perhaps Hammond 164H16 (115VAC to 16V CT @ 1.25A) might be a better choice?

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Post by Mr. SD-1 »

Hmmm... should I wire the 'bottom' end of the secondary as 'common' and use both secondary 'halves' into rectifier/filter cap for the 7818... then use center tap to feed a second rectifier/filter cap set for the 7809? Perhaps this scheme would be a little easier on the regulators.

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