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notch filter
Posted: Tue Jan 11, 2005 3:23 pm
by itjisfo
looking for sources for a 2175 notch filter to filter out guard tone for recording purposes ...
thanks in advance ...
2175 Hz Notch Filter
Posted: Tue Jan 11, 2005 6:34 pm
by Dan562
Here, try this website:
http://www.vega-signaling.com/index.htm
The Notch Filter is Model # 330.
Dan
Posted: Wed Jan 12, 2005 2:09 am
by Will
The #330 is a very old design, they do work .I put many #330's in repeaters to notch out the single tones.
Look for a opamp notch circuit that uses an inexpensive opamp and a few capacitors.
Posted: Wed Jan 19, 2005 6:35 am
by arlojanis
I have an adjustable notch filter that is for about 2805hz. It has a 358 IC, two adjustments, needs 7 to 16 volts, and has two adjust pots. It might cover your frequency. Contact me if you are interested.