[sdiy] EMS VCS3 II negative power supply problems

[Mattias Rickardsson]

VCS3 is alive and kicking now, I obviously needed to swap the regulating
741 once again.
+12V and -9V come out as +12.2 and -8.8. Haven't tweaked anything yet.

Is there normally a good reason to calibrate all trimpots in these beasts,
or is it safer to leave them be? Well-tuned oscillators have never felt so
unimportant. :-)

/mr

Den mån 19 sep. 2022 16:41Mattias Rickardsson <mr at analogue.org> skrev:

> Magnus Danielson <magnus at rubidium.se> skrev:
>
>> Hej Mattias,
>>
>> It's a classic over-current protection setup. So if there is too much
>> current it will make the driver back off. If this is broken you god that
>> happening you the supply.
>>
>
> Ok, thanks! Nothing completely unexpected then.
> But... what did your last sentence try to say? :-)
>
> /mr
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://synth-diy.org/pipermail/synth-diy/attachments/20220920/7b4c8b68/attachment.htm>