[Test-Equipment] 2753p/TR503

[John Miles]

> John, thanks for the interesting post and the link to your site.  I have a
> 2753P which seems to work well and I'm enjoying the features and accuracy
of
> the unit. I have no manual so have been "experimenting" and think I have
> most of the features sorted out.
>
> I did also acquire a badly treated TR503 tracking generator - I have no
> module bay (and no manual) to use with it so my question is:  I assume I
can
> just apply +/-15v (maybe 5 volts too?) to the proper pins to check this
unit
> out.  If someone has the pinouts for the power or can scan that portion of
> the manual, it would be greatly appreciated.

I built my own TR503 clone (http://www.qsl.net/ke5fx/tr503.html) -- if yours
is in bad enough shape, it might be easier to strip it and repackage it in a
standalone enclosure, I suppose.  Either way, though, the manual would be
pretty important.  Don's comments about the outboard pass transistor are
interesting, I hadn't heard that.  Still, if you knew what the regulator
output was supposed to be, you could probably supply it externally.

www.consolidatedsurplus.com has rental manuals for both the TR503 and 2753,
but it's not clear that the former has schematics.

-- jm