Double Jeopardy --- No Sound In JFET mode. Wait... I mean opamp mode.

ryugu

Member
Opamp mode working perfectly and sounds glorious, but the reason I picked this particular boost is to have the choice of two different sounds. I biased both transistors to within about 5% before plugging in a guitar. Very disappointed it was dead silent. Where can I start checking voltages? IMG_20230115_005815057.jpg IMG_20230115_005827092.jpg IMG_20230115_005855714.jpg
 
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UPDATE: I played around with this some more and discovered that UP is JFET mode, and DOWN is the Opamp. So I had it backwards. :oops:

So I'll guess I'll be trying a new TL071. This is really the opamp used in the original? Seems odd b/c that is also JFET.
 
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