OldSynths

Hi,

Thanks for the tips, Bob.   Concerning the regulator--which I'm assuming I need to 
replace--I've been trying to find a modern replacement--is there a easy way to do 
that?  It's listed in the schematic as a Fairchild U5R 7723393, and it's an IC.  I can't 
find that part number at Digikey or NTE or even the Fairchild website.  Any tips?

Also, the trim pot for the negative voltage only trims it down to about -18.5.  Does 
this mean it could be the *trimpot* that's blown and not the regulator itself?

--David


--- In oldsynths@yahoogroups.com, "Bob Weigel" <sounddoctorin@m...> wrote:
 >     Yow, I'd double check that -19V!  BE CAREFUL THOUGH!  Some of those
> chips may be rated for 15V...I can't recall...surely a 301 isn't rated for
> more than 18V I don't think.  Pretty old chip.  My farfisa organ got a
> couple tos chips knocked out and I had to buy retro modules for it which
> were expensive...due to a bad regulator.  But before you turn it on get
> ready to turn the powersupply adjustment and slowly turn it to make sure you
> don't go the wrong way immediately on turn on and get that set right.
>