Build and Use an Audio Probe

[TomCarlos]

Hey friends....

This is a cool DIY tool.... Build and Use an Audio Probe.

Make an Audio Test Probe

Use the Audio Probe For Troubleshooting

I found the Radio Shack 277-1008 Audio Amplifier on eBay. But you can use a similar small amp that will accept a mini input.

Tom

[Randall]

You can also use a little powered speaker for a computer. I wouldn't use a 400v cap, tho. I'd go 600v.

[nosaj]

Hey friends....

This is a cool DIY tool.... Build and Use an Audio Probe.

Make an Audio Test Probe

Use the Audio Probe For Troubleshooting

I found the Radio Shack 277-1008 Audio Amplifier on eBay. But you can use a similar small amp that will accept a mini input.

Tom

Yea they are pretty nifty. Tom Phillips floated an idea I copied. Using a scope that has a channel 1 out I tee'd it out to a frequency counter and a small amplifier. So you can keep the tube amp on a dummy load but you can see/hear the waveform.

nosaj

[mac dillard]

I first saw the audio probe on R.G. Keen's site. Used to test circuits in stomp boxes. I use it a lot to inject a signal into different sections of the circuit. plug it into a Walkman and you can inject the signal instead of listening to an injected signal. lets you find where you have a problem

[Enzo]

Or you can make up the probe wire only and plug it into any small guitar amp you have around.

These things are called signal tracers, and have been around for decades. Back in the 1950-60s no shop was without one.