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Date: | Sun, 12 May 2013 00:14:48 -0600 |
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sorry guys, I get confused between these freq counters, the one for the MFJ
is the MCount, not the freq mite.
Just going over the text file now. It looks like you need:
an NE556 dual timer (there has to be modern versions of that chip, it's not
special)
You need a CA3240 op amp
A temperature stable reference diode LM336 (common like air)
and that's all the IC's required for the VCO...a few other caps, resisters
and a few transistors along with a calibration pot round out the circuit.
Information about the MCount and obtaining one is found here:
http://wb9kzy.com/mcount2.htm
If this was the oh so special chip, it's 3 bucks to buy and easily available
apparently.
They're sold out of the MCount2's, however, I suspect if there was interest
they might be had.
And yes, an MFJ 249 was used as it's very similar to the 209.
Anyway, this is all well within the reach of most blind hams to obtain and
have built or modified. No problem.
73
Colin, V A6BKX
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