[time-nuts] Lab upgrade

[Robert LaJeunesse]

One of the cheap and dirty ways to find a short is current tracing. Use a voltage and current limited source and a matching detector to find where the current flows. I've used a current limited DC supply as the source and, for the detector, an old DVM with 10uV resolution. For an AC approach a simple audio oscillator (or function generator) works nicely as the source, while a the detector starts with an audio playback tape head (from an old VCR), then some sort of amplifier-speaker, or maybe just an oscilloscope. If you are lucky you have an old HP logic pulser and current tracer set that do the same thing...

Bob L.

> ...
> 
> I'll buzz out the pins on  the connnector there and see if I can find the
> probably short and let people know.
> 
> Cheers
> Jason