tube screamer issues

[JebemMajke]

So i've built a ts808 using tonepad schematic, as I;ve did many times before.

http://www.tonepad.com/getFile.asp?id=81

For some reason my tone pot is having some issues, whenever i turn it to max or lowest there is no sound what so ever.
voltages

8 8.93
7 7.93
6 1.5
5 4.27
4 0
3 4.47
2 4.48
1 4.53

any ideas?

[R.G.]

Section two of your opamp (pins 5,6,7) show something wrong.

Pin 5 is at what I suppose the bias voltage to be, but pin 6 should be the same voltage, and so should pin 7. It is likely that something is holding pin 6 down. Check your circuit to see if there is a soldering or parts placement error around pin 6.

[jimilee]

Is the tone pot shorting out on something next to it when you twist it, or is it a bad pot?


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[JebemMajke]

@ Jimlee

Bad pot was my first thought, so I've tried 3 different pots, and results were the same.

@ R.G.

I'll check pin 6. Thnx

[JebemMajke]

It was a bad 0.22 u Cap.

[duck_arse]

out of interest, what type of cap was it?

[JebemMajke]

Film type.

Should have been tant, but hell.

Film box, wima it is now.