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In Reply to: RE: Black Gate N caps for tuner posted by sherod on June 18, 2016 at 16:18:27
OK, but just a work of caution, while the boards are decent the circuit traces are really, really delicate. Watch the iron temp and get in and out fast.
Starting at the IF board and strictly looking at the signal path,
C15 add a 0.047 polyprolylene bypass cap WIMA MKP2 is nice.
C4 add a 0.047 polyprolylene bypass cap WIMA MKP2
C17 & 19 The 10 would work there but I would go 22
C18 & 20 The 10s will be fine there
C5 & 15 The schemo says 1, the factory installed 4.7, on at least the 2 I worked on
C10 & 20 10s are fine there.
That's everything in the signal path.
I know you recommend increasing value from 10uf to 22uf at C17/19 on MPX board. Would 33uf be excessive in those locations as decoupling?
Yes a 33 will work, shouldn't be an issue at all. That's signal path not decoupling.
My schemo says there is also a 1uf at C22( I don't know if this location warrants a N cap. Also, there are 4.7uf at C21 and C24.
That's the signal feed to the headphone amps, so if you use cans
C21 & 24 10
C22 & 25 4.7
I'm going to do some experimenting.
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