Wild_Bill wrote:
This model is a factory assembled model, and wasn't available as a kit,
AFAICT.

Dual counter A-B, single 8-digit LED display (7-segment LED green or red
digits).

Input A 5Hz-175MHz
Input B 5Hz-2MHz

The Input B doesn't show a count when a signal is applied.

The Input A section seems to operate as it should.
...

These folks claim to have a copy for sale @ $22USD (not bad if original):

http://www.vintagemanuals.com/manual...model=ETI-7040

However these folks don't have a download schematic (pity) although they
do have a lot of older Heathkit info:

http://www.vintage-radio.info/heathkit/

John :-#)#

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