I'm no expert, but I think you want to leave the counter on the bench.
Check this site out for a display....
http://www.aade.com/applications2/app2.html
Because the rig mixes signals, and uses the sum in some cases, and the
difference in others...perhaps even the same rig, for different bands...You
need a bit more "smarts" than simply tapping your counter onto the leg of a
chip.
I still have 5 or 6 old Heathkit SB650 freq readouts for the old Sugar
Baker/Hot Water lines. Back then, it was like a friggin computer! Large
board loaded with chips....plug in no less....amazing that they still work!!
But same thing, it had to take three frequencies from the rig, and juggle
them to get a readout. Probably all done with a single PIC these days.
:-)
.....Dave
----- Original Message -----
From: "VE3XGB" <ve3xgb@sympatico.ca>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Cc: "VE3XGB" <ve3xgb@sympatico.ca>
Sent: Saturday, February 12, 2011 10:04 AM
Subject: [TenTec] Century/22 tapping rx freq for digital counter
Hi all,
I've got a digital freq counter and wanted to use it as a digital freq
readout on my Century/22 but I can't seem to find a 'source' in the rig.
The circuit diagram shows the mixer as a UPC1037 (?) IC but mine has a
MC1496P.
Anyway I found the data sheet for the MC1496P double-balanced mixer and it
would seem to suggest that pins 6 and 12 were the output but when on 80m I
couldn't find a 3.5XX MHz signal on any pins. I can see the 10.000 MHz
band crystal output and I can see the 6.5 MHz PTO output (difference in
the 3.5XX range) but nothing 3.5XXX
Thanks for any suggestions
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