Hi Crutschow,
I had not thought of using a spectograph for this. I should have really, cos now
i think thats one of the diagnostic pieces that were used at the research place
where i used to work.
And yes, there are some free programs for these out there. So yes, that would be
a good start, to get one of those rigged up and working.

That is an excellent suggestion, and i will start looking at ways to do this first.
I will check out that link you posted.

John

Hi Stevez,
your post confirms the value of this type of display, but i suspect that it will
not be easy to interpret the information, as i wont be able to fit sensors directly
to the bearings.
There are free downloads for this type of program available, so i will be sorting
stuff out to get a PC running out in my little garage, and looking at various
transducers, accelerometers, maybe microphones.
And maybe a small pre-amp to drive the 'Mic' input.

John

Hi Nigel,
That sounds very similar to what i have in mind.

I had not considered monitoring temperatures around the engine, and if i did then
it would be with small fixed sensors. Those IR types are way out of my price
range.

John