[Heath] IM-2420 Freq Counter problem

Alexander N. Gerli ac1wye at gmail.com
Thu Sep 25 17:41:29 EDT 2014


Hi, gang!

I'm trying to figure out something. My counter does count, but one digit's
way off - the x10MHz. For instance, if I key up my HT nearby on 146.34/94,
the counter displays "106.3400" Off by 40MHz. Now, I can't find any such
anomaly covered in the "ICOD" section of the Manual (naturally...). I'm
figuring that I need to recalibrate the 10mHz Oscillator inside its
styrofoam oven. I have another portable counter I can use and it is right
on. But if it were off by that much, how come the suffix reading of .340mHz
comes out on the nose? Anybody have any suggestions? Maybe a divider chip
could be off, but I have NO idea which one. I guess I could reseat all the
chips  in their sockets?

​73,​


​Sandy AC1Y​


Alexander N. Gerli, Sr.
548 Allred Mill Road
Mount Airy, NC 27030-2202

Scotsmen walk about 900 miles each year.
A Scotsman drinks around 45 gallons of Whisky a year.
Scotsmen get about 20 Miles Per Gallon.
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