Thanks for this , very detailed. Instead of the bnc connector would it be ok to put 2 x banana plug connections into the box and plug a red test probe into one and a separate croc clip into the black for the ground and just connect accordingly inside the box?
If they are proper connectors and rated for the high voltage they may encounter... I can't see any reason why this wouldn't be fine. Thank you for your comment.
thanks for the info on this! I've built it, but it seems to me that it is very low in volume, when i connect it to an amplifier. I tested it on the output port of my phone (measured ~300mV on the mid volume settings) and it was somewhat hearable, but not very well. I am assuming to use this to debug guitar pedals, i would really need to boos the signal, or am i thinking wrong about this?
Hello, I built this for tube/valve amps which have a relatively high audio output at the correct pins. It is designed to block the volts AC, and let the DC audio signal pass. It really is just to determine if the audio signal is there. It's not specifically designed for guitar pedals which operate on very low signal levels. Having said that, if you can hear the audio signal it is working in as much as it tells you the signal is present. How much it can be amplified depends on your amplifier. It's really a blunt instrument to trace the signal. I don't repair pedals so I can't offer anything more specific. I wish I could be of more help! Thanks for your comment.
