Vintage Synth Repair

On Thursday 18 September 2008 11:00, r_j_d_2.phila wrote:
> ok, new plan-i left the unit on for an hour, and the + rail seems
> solid, but -15 drifted down to -12.5. both sides of x-former were in
> the 23VAC range, so i have a new plan:
>
> 1-stick with old PSU
> 2-replace + and - power transistors.
> 3-socket and replace voltage regulators while im in there.

How about before you blame the PS you make sure that there isn't something of 
an excessive load pulling it down?  Could be that,  or the PS,  and you're 
assuming there without anything I'm seeing posted to indicate one way or the 
other...

-- 
Member of the toughest, meanest, deadliest, most unrelenting -- and
ablest -- form of life in this section of space,  a critter that can
be killed but can't be tamed.  --Robert A. Heinlein, "The Puppet Masters"
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Information is more dangerous than cannon to a society ruled by lies. --James 
M Dakin