Post by deepdark on Jan 15, 2016 12:41:24 GMT -6
HI
A friend of mine just got one for nearly nothing. It's a nice little mixer: 16in 2 out, made in the mid 70's. Anyway, This mixer originally came with an external 21V power supply. The one he got had a 12V wall wart solder into it. It works good, but the weird fact is that I made a 21V external power supply to replace the Wall wart, and it does not work. I mean, the pilot led does lit up, there is 21V on the B+ rail, but no sound coming out of the miuxer, while it does sound good with a psu of 12V. I think the only thing that came out with the 21V supply was a faith noise, that's it! I'm scratching my head to understand why, for the life of me, it does work good with nearly half the voltage than originally specified. Does the previous owner modified it to accomodate 12V? Does it have any kkind of jumper to select between 2 B+ voltage? The documents are somewath incomplete so it's hard to really know what's going on lol. Do you think I'm overthinking here and should simply made the power supply at 12V and be happy with that, since we know nothing about the previous owner and what he did to it, other than strapping a wall wart to it loool!??