PS... now that I've got ur attn, anyone know a 'filter' that hunts
out a hetrodyne freq. and nulls it automatically?

Yes, they are used for rock music to get the vocal monitors loud over loud
backline setups
They hunt constant frequency's and sharply notch them out, monitors
engineers best friend.
I personally never tried them on a radio, may not be enough cut like a good
receivers manual notch filter
http://www.samedaymusic.com/product--DBXAFS224
http://www.fitnessav.ca/detail.aspx?ID=11
give em a call

-Joe



"Netnews Marty" wrote in message
...


Wonder if Radio Shack 21-543 uses switched capacitor filters as basis.

Google no direct help but does show Rad-Shack parts list that might
be plumbed for an answer.

Would like to move the CW center-freq. around the 750 hz place it's
currently located - per '95 Handbook wherein only a pot's needed with the
MF8CCNs in a design there.

Thnks for the read OMs

Marty aa4rm

PS... now that I've got ur attn, anyone know a 'filter' that hunts
out a hetrodyne freq. and nulls it automatically?



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