Isosceles Boost - High pitch wine ?

[Pimpoftheyear70]

Looking for any help with my latest build .

Put it all together , and its got a crazy loud wine when engaged .
By pass is clean and quiet .
Using a known good Boss PSA120 power supply .

Swapped out the TC1044SCPA with another one , no change .
Swapped out the TLO71CP with another one , No change.
Using BC550 , the build sheet calls for a BC550C . Not sure if that matters ??

I check and meter all caps , diodes before they are installed on the PCB . All seemed ok .
A straight a head build , never thought i'd have a problem with this one .


Any help would be super appreciated .
Thank you !

 

[Radkins80]

No I haven't. Where are they based out of? I am in the US and don't really want to wait a month or more for parts.

 

[Danbieranowski]

No I haven't. Where are they based out of? I am in the US and don't really want to wait a month or more for parts.

I’m in the US as well and their DHL shipping is fast. Usually a week or so. It’s where I order most of my components and parts from (and I’d venture a guess a fair amount of other people here do as well). They even have PedalPCB specific pre-drilled enclosures.

Electronic Parts Online Store - Tayda Electronics

www.taydaelectronics.com