Ok, I FINALLY found the problem!
Being a little bit of a newbie at this, I trusted the package markings on my 1% resistors as
being accurate. It seems that when I bought them, I had my 220k's mislabeled as they are
really 220R's! I had the wrong 220's installed. I finally figured this out and changed these
resistors to the proper values. Now the cv section is working, and I was able to get
something that sounded right.
Thank you all so much for staying with me on this most perplexing problem... it is VERY
much appreciated!
-Michael
Being a little bit of a newbie at this, I trusted the package markings on my 1% resistors as
being accurate. It seems that when I bought them, I had my 220k's mislabeled as they are
really 220R's! I had the wrong 220's installed. I finally figured this out and changed these
resistors to the proper values. Now the cv section is working, and I was able to get
something that sounded right.
Thank you all so much for staying with me on this most perplexing problem... it is VERY
much appreciated!
-Michael
--- In cgs_synth@yahoogroups.com, "prophei" <prophei@...> wrote:
>
> hello all,
>
> for the life of me, i can not get any response whatsoever from anything on the cgs65
that is
> related to control voltage. this includes the 2 pots that connect there and the cv input.
>
> i get audio through the audio input and out that is affected by the control pot there.
>
> i have tried rechecking all of my solder points, tried swapping out the lm358 for
another,
> tried replacing the trimmer... and i am just not sure where else i best look. any
suggestions
> regarding the critical points to check?
>
> given that nothing works down there, must the issue be between pin 1 of the lm358 and
the
> 5pin of the tube?
>
> thanks!
>
> -michael
>