[sdiy] Modding an old analog - can someone assist? A Puzzle...

[>>>marjan<<<]

> The mod I am currently working on is to adjust the 'travel vibrato' time
> (that's early Korgspeak for LFO adjusting the filter).
> 
> I have a close up of the schematic on this link:
> 
> www.wwnet.net/~midibear/700.gif
> 
> Pin 51 goes to a 50K pot on the panel, then to ground, for LFO speed adjust.
> 
> What I want to do is slow it way down, so LFO speed can be upwards of 10 to
> 30 seconds max, instead of 1 second max.
> 
>

Try 33u to 100u across that original tantal 3.3u cap in the middle.
Mind the polarities.
I'm not sure how'd the cct handle such large cap but try some 10u
values first than increase.


marjan