Punch amp trouble shooting

[Cole2434]

Hi, I'm new to Electronics and diy amp/pedal building. I'm building a TDA7052A punch amp and I'm prototyping it on a breadboard. When I plug my guitar in there's a buzzing coming from the speaker, but I can't hear my guitar though it and I don't know why. Any help would be much appreciated.

diagram I'm basing it off of:



My breadboard

[11-90-an]

Welcome to the crazy world of electronics...

I don't think you should socket an IC on breadboard since the breadboard is one big socket...

You seem to have the same schematic with this guy...https://www.diystompboxes.com/smfforum/index.php?topic=124830.0

Have you tried swapping the jfet and the IC? one of them might be defective...

[deadastronaut]

Hi and welcome, here is how it should be wired

on your breadboard...

connect your 9v and ground to the rails and it should be fine...

ignore the '5088' it should be a 2n5457/j201....

[Cole2434]

Hi, thank you for the reply. I rewired it following your diagram, but I still can't get my guitar signal to come through the speaker, it sounds the same as before. I tried a different op amp chip but that didn't change anything. Is there anything else I should try? Is it possible that the speakers broken even though I can hear a buzzing through it when I turn it on?

[11-90-an]

Hav you tried swapping the 2n5457? Try swapping out all the components  ...(given you have extras) 

[willienillie]

Maybe, not sure, you need to swap the wires from the input jack.

[Cole2434]

I don't have extras for most of the components. Is there a way to test the components to see what is faulty?

[11-90-an]

https://www.diystompboxes.com/smfforum/index.php?topic=124835.0

This thread should help you with your jfet...

[Cole2434]

Thanks for the link, but Since I'm such a beginner at all this I don't have resistors and such laying around to test the Possibly faulty JFET with in a circuit. I'm also kind of confused on some of the terms and such that there using. Is there a way to test this on a multi meter?

[11-90-an]

https://www.allaboutcircuits.com/textbook/semiconductors/chpt-5/meter-check-transistor-jfet/

here ya go... 

extra jfet knowledge...https://www.electronics-tutorials.ws/transistor/tran_5.html

[Cole2434]

Ok, I have 300 ohms resistance between both the source and the gate and also between the drain and gate. I also have no resistance when connecting the drain to the source.

[11-90-an]

Ok... seems like the jfet is ok...

Maybe, not sure, you need to swap the wires from the input jack.

Have you tried this? Just swapping where you put them on the board should help, i think

[duck_arse]

standard proceedure is to measure the voltages around the IC and transistor/jfet, and post the results here. we can guide you through the steps if there is anything you don't know or understand.