WTB manual.

[DonaldF F Christensen]

To any & all Heath experts: Still searching for a owners manual for a
Model IT-21
Tube Checker. My question now is: Are there significant differences
between the
Models IT-17, IT-21 and IT-27 or is it mostly paint color? I've turned up
a book for the IT-27 but hesitate to buy before I know whether it is ok
for the IT-21. Never before had any problem finding Heath manuals but
this one hasen't been as easy. Also, I'd like
to find a couple of old Heath catalogs-one from around 1957, another
around 1965.
Thanks to all & 73 Don W8WOJ

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