Pedal Clone shows DC output

[meidinad]

Hey all,

Sorry in advanced, I don't have the schematic with me as I'm on Holiday vacation but wanted to get this question asked.

In the effort to learn Diptrace and PCB building I tried to build a TS clone with a true bypass switch by replicating it in Diptrace, ordering PCBS, and building it. And while it actually works when I test everything, the tip of the output shows about 4.5V DC at max volume... Which I know isn't correct. It should show 0 or close to it DC. Has anyone seen this? I'm lost why I'm seeing DC output.

Thanks in advance. If it's impossible without a schematic I can repost next week.

[GibsonGM]

With no pics or schema, best I can do is suggest there is a missing or bad output cap allowing DC bias voltage to the output.

OR, a short across it, allowing DC to pass.   

Welcome to the forum, Meidinad!     Get some pics of the board up and maybe we can say more!

[idy]

Welcome to forum.

It suggests no "DC  blocking cap" after your output buffer. Typically there is a cap (100n?) attached to E of output transistor, then a "voltage divider" of two Rs. Possibly also that last R to ground went to VB (1/2 supply) instead of ground?
If that last cap is shorted out or leaky you would get DC. Leaky it would show less that 4.5v.

[meidinad]

I'll check both these when I'm back at the schematic and report back. Thank you! I'm very excited for this new adventure!

[antonis]

I suspect that OP's TS clone is lacking in output buffer..
(due to 4.5V DC both absolute value and variability with Level pot..)