[sdiy] power supply pain

[KA4HJH]

>I tend not to use regulators in series unless the second one is very low
>current. A typical application would be 7815 and then a 7805 for the +5V
>at 10mA. If the currents were going to be similar, ie. 500mA each, then
>you must really take them separate. This way the total power dissipation
>would shared nicely between them.

No sense throwing away all that current as heat. This reminds me of the
Oberheim Two-voice. There's a +/- 18.5V regulated supply in the cabinet,
and smaller +/- 15V supplies on the various PC boards. Seems to work well.
Keeps the heat on the PCB's to a minimum.

-- 
Terry Bowman, KA4HJH
"The Mac Doctor"