[Lowfer] frequency counter calibration

[KD7JYK DM09]

: > After contacting Optoelectronics, they want $75 plus return shipping to
: > calibrate it. "Calibrating" it simply involves supplying it with a known
: > frequency standard of 10 MHz or greater and turning a small screw on the
: > front of the unit. It doesn't even have to be opened up.

I just went over this with them...

I need a new calibration variable capacitor.  I tried to cal mine about a 
decade ago and the part went crunch.  Trying to get a new part from 
Optoelectronics, it's $5 off the book, $20 or more on the book, $75 to have 
them do it, solder two leads and turn a screw...

I got a handful of new parts just by asking around.

Haven't repaired mine yet, but I did run it on a stable source, though off, 
it did dance around in the 100 Hz place at 470 MHz.

Kurt