Frequency counter info needed

[Techno1]

Along the years many frequency counters have been sold out there.
There were regular ones with the so239s in back and some with the so239 and a antenna built in so you can use without jumper cables.

Would anyone have a circuit or directions on a way to make or add an antenna on a frequency counter so the jumper cables/so239 is not needed.
Just place the freq counter close by, keyup radio and freq counter will read the frequency.
Possible add a switch to use with jumpers or the added antenna.

thanks

 

[nomadradio]

If what you're talking about is what they call a "bench" counter, with a BNC jack on the front, just wrapping an unshielded wire around the radio coax 5 or 6 turns and connecting to the center pin of the BNC socket will usually do the trick.

And if your counter only has the two SO-239 coax sockets on it, some internal surgery may be needed. Can't tell anything specific about that without a road map for what's inside that counter.

73