Cgs synth

Yes, the 741 output should do that to turn the relays on.
Next, look at the collector of the transistor. That should go down to near
zero volts. If it does, then you have problem with the relays, RCD, or the
trackwork between them. If it doesn't, check the emitter really is connected
to ground, and check the resistors between the 741 and the base and groud.
The base should go to about 0.6 or 0.7 volts when the 741 output is at 14.2
volts.

Ken

>Hi,
>
>yesterday I tested a PSU (+5V, +/- 15V) with a CGS63 Power Supply Delay but

at the and of the relays

>I get no voltage. I get +14.2V at pin 6 of the 741 (the output) and nothing

at the link near RCO

>so my guess is that I have a faulty BC 338. Or is the +14.2V wrong there?
>
>I have also posted this yesterday on Electro Music:
>http://www.electro-music.com/forum/viewtopic.php?t=56546
>
>As there is no local store where I could get another BC338 to test my guess

I would have to

>order it from an online shop so it would be nice if anyone could comment

whether the 741 is

>behaving as expected.
>
>Cheers
>Joachim
>
>
>------------------------------------
>
>The CGS Modular Synth home page: http://www.cgs.synth.net/
>Yahoo! Groups Links
>
>
>
>

_______________________________________________________________________
Ken Stone sasami@... otherunicorn@...
Modular Synth PCBs for sale <http://www.cgs.synth.net/>
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