TS-type problem. Ticking sound?

Started by tyzjames, May 06, 2013, 01:30:58 PM

Previous topic - Next topic

tyzjames

Hi,

I just built a TS-type pedal and I've got this weird problem. When volume is down, there is a fast ticking noise, like 300bpm. Its a little more faint when the volume is turned up. This noise goes away when I engage another pedal AFTER this pedal. I've been trying to troubleshoot but no luck yet. Connecting a 1uF elec cap and above from output to ground removes the noise. Anyone encountered something like this so far?

Thanks,
James

R O Tiree

Which schematic are you using, please?
...you fritter and waste the hours in an off-hand way...

tyzjames

Hi Tiree,

I'm using this:


Without the flipflop switching. Input and output buffers are MPSA18


R O Tiree

OK, that's a bog-standard TS schem... next question, which layout are you using, please?
...you fritter and waste the hours in an off-hand way...