madbeanpedals::forum

Projects => General Questions => Topic started by: Philthy on June 29, 2017, 12:28:53 PM

Title: Cave dweller and gcfx p-lfo issue
Post by: Philthy on June 29, 2017, 12:28:53 PM
Just added a p-lfo to my cave dweller and it significantly reduced the maximum delay time down to something just above slap back levels.

Is this normal and what can I do to increase delay time with the p-lfo?

Cheers
Title: Re: Cave dweller and gcfx p-lfo issue
Post by: Philthy on July 01, 2017, 08:47:36 AM
So I spent an hour or so today trying a few different Rs across tabs 1 and 3 of the cave dweller delay pot and also across the LDR on the p-lfo  in an attempt to increase the delay time . I had a few different values from 1 ohm up to 1 meg on hand and nothing made a difference.

Appreciate any advice on this. With the delay pot nearly CCW if have a chorus pedal and full CW I have modulated slapback :o
Title: Re: Cave dweller and gcfx p-lfo issue
Post by: Jean-Rock on July 03, 2017, 01:39:41 AM
Have you tried to attach L1 to PIN 1 of the delay pot?
Title: Re: Cave dweller and gcfx p-lfo issue
Post by: Philthy on July 03, 2017, 03:51:21 AM
yep, ttied that

I'm going to try and attach the p-lfo in series to the pot rather than in parallel when i get a chance - will have to remove one or two wires from the pot daughter board to do so
Title: Re: Cave dweller and gcfx p-lfo issue
Post by: cajone5 on July 03, 2017, 01:18:48 PM
Quote from: Philthy on July 03, 2017, 03:51:21 AM
yep, ttied that

I'm going to try and attach the p-lfo in series to the pot rather than in parallel when i get a chance - will have to remove one or two wires from the pot daughter board to do so

I think that's the way it's supposed to be attached (in series). That way it modifies by adding/subtracting a small resistance instead of
Throwing a small resistance in parallel which would basically bypass (for the most part) the larger resistance of the delay time pot.

I think this ought to fix your issue.