ADA STD1 stereo tapped delay troubleshoot
« on: January 23, 2010, 06:00:13 AM »
Hey guys!
I bought a used ada std1 without power cable, so i couldn't test it, and guess what? it doesn't work....
The problem seems to be in the psu, which uses transistors, and a strange IC which seems to be an oldschool regulator that goes feeding the BBD.

Now i'm thinking that i could replace the whole thing with todays regulators but i need to figure out if there is other voltages in there than +-15V.

So my question is, does anyone have a schematic for this thing?
Thanks for reading!


Re: ADA STD1 stereo tapped delay troubleshoot
« Reply #1 on: January 23, 2010, 07:11:57 AM »


Re: ADA STD1 stereo tapped delay troubleshoot
« Reply #2 on: January 24, 2010, 10:17:09 AM »
Well of course I wont find it easily if I forget to look in the most obvious place! Thanks a lot man, i'd forgotten how great that website is... An on we go, let's swap some ICs!

When I look at it, that PSU looks like nothing I've seen before, why use a Astable miltivibrator to generate +-15 from a +-15 transformer when I guess regulators already existed?


Re: ADA STD1 stereo tapped delay troubleshoot
« Reply #3 on: November 19, 2019, 05:34:25 AM »
Bringing this thread back from the dead in search of a good schematic for the STD-1... hope someone can help!  The link above only takes me to the main page of a now-defunct (apparently) ADA forum...

Thanks for any help!




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