SOLVED Duocast half working!

[Phil hodson]

Hi all,
Reaching out to see if anyone can help before I start driving myself mad and ripping it apart! I was hoping for another perfect build but hit an issue.

So I get sound when the pedal is plugged in but not on. So I know I’m plugged into the correct jacks! And they are wired properly.

When I switch it on the side by the transistors works fine. It has the 3PDT daughter board on the switch.

On the hand wired switch side (by the transformer) I get nothing. The led lights up so that’s wired correctly but I get a quiet guitar sound but no effect.

Any thoughts? Pics attached. Let me know if you need better quality ones or more.

Would love to get this one boxed up!

 

[Harry Klippton]

I haven't built this or played the Hudson unit but I thought one footswitch was on/off, and the other footswitch was a toggle between high and low gain when the pedal was engaged

 

[JamieJ]

With the jacks in the opposite way you will still get a bypass tone so make 100% sure your in cable goes to your input jack (I have made this mistake too many times!).

My main question is how have you been powering the pedal?
The + and - of the power haven’t been wired up in the pictures you’ve attached.

The next thing to consider is verifying the transits pin out. Having the wrong pins in the wrong places can allow some signal to pass but not the full effect. I can’t tell what transistor it is from the pictures.

If those options fail then check all resistor and cap values. Failing that it audioprobe time.

 

[Mcknib]

One of your transformer solder joints looks a bit ball like could be dry inside try reflowing those

 

[Phil hodson]

Thanks all for the replies.
It must have been too much Christmas cheer as I feel like a right idiot!
Thanks especially to Harry who actually made me read the Hudson website again and more accurately this time. I thought the two switches controls the low and high sides but one turns the pedal on and the other does the high/low gain
So basically it’s working!
Jamie, I was running the power from my little test bed. I just poke the +/- into the pcb. Just to give an idea if it’s actually working before I attach the main power to the enclosure. In case I need to take it out again.
I used an OC71 but socketed it so I can try out some different ones if I need too.
Mcknib thanks for spotting that. I will go and address it.
So, technically it’s been solved even if there was nothing actually wrong in the first place. Apart from my reading skills

 

[JamieJ]

Good to hear it’s sorted Phil!

 

[Phil hodson]

Thanks Jamie.
Technically it was already sorted haha Think I have been building too many double foot switch over drives recently!

 

[Harry Klippton]

glad you got it working though

 

[Phil hodson]

Thanks Harry. Your first reply nailed it for me. READ THE INSTRUCTIONS .