marksescon
Active member
Very weird issue that I am having.
Example Video:
I incidentally discovered this while doing QA on my pedals - I get squealing when the following conditions occur:
(1) Cord plugged in between amp and pedal.
(2) Pedal is powered but effect not engaged.
(3) No cord plugged into input jack.
I first discovered it in one of my Klones (Kliche), but upon investigating my other buffered bypass pedals (like the DRV/Informant), the squealing is present under the same conditions. Squealing changes frequency when adjusting gain and tone knobs.
When a guitar is plugged in, there is no more squeal. Furthermore, the effects work perfectly fine. No squealing or weird buzzing other than what you’d find in any high gain circuit.
Things I’ve tried that *have not* worked: Audio probe (difficult to do too because I need input audio jack to be open); different audio jacks like Lumberg, Open Frame, Enclosed; different amps and cables and even power supplies (I have Truetone CS12, 9v batteries with 2.1mm adaptor, and even a regular 9v dc jack); different ICs (I have stock from Tayda and Mouser); checked for any grounding issues (nada); and finally, checked soldering and joints.
The only way I have found to remedy the situation is to actually make the pedal true bypass, which is why I am sort of concluding it’s a buffered bypass issue. However, I don’t want to draw any conclusions without soliciting the insight of the community.
I know common courtesy would dictate that I post pictures of every pedal; however, because this seems to be a widespread issue and not isolated to one pedal, I felt the video example would serve as a foundation to your answers.
Example Video:
(1) Cord plugged in between amp and pedal.
(2) Pedal is powered but effect not engaged.
(3) No cord plugged into input jack.
I first discovered it in one of my Klones (Kliche), but upon investigating my other buffered bypass pedals (like the DRV/Informant), the squealing is present under the same conditions. Squealing changes frequency when adjusting gain and tone knobs.
When a guitar is plugged in, there is no more squeal. Furthermore, the effects work perfectly fine. No squealing or weird buzzing other than what you’d find in any high gain circuit.
Things I’ve tried that *have not* worked: Audio probe (difficult to do too because I need input audio jack to be open); different audio jacks like Lumberg, Open Frame, Enclosed; different amps and cables and even power supplies (I have Truetone CS12, 9v batteries with 2.1mm adaptor, and even a regular 9v dc jack); different ICs (I have stock from Tayda and Mouser); checked for any grounding issues (nada); and finally, checked soldering and joints.
The only way I have found to remedy the situation is to actually make the pedal true bypass, which is why I am sort of concluding it’s a buffered bypass issue. However, I don’t want to draw any conclusions without soliciting the insight of the community.
I know common courtesy would dictate that I post pictures of every pedal; however, because this seems to be a widespread issue and not isolated to one pedal, I felt the video example would serve as a foundation to your answers.
