notch filter

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itjisfo
Batboard $upporter
Posts: 56
Joined: Fri Nov 23, 2001 4:00 pm

notch filter

Post by itjisfo »

looking for sources for a 2175 notch filter to filter out guard tone for recording purposes ...

thanks in advance ...
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Dan562
Posts: 533
Joined: Mon Aug 23, 2004 7:30 pm
What radios do you own?: Kenwood, Yaesu, ICOM, Motorola

2175 Hz Notch Filter

Post by Dan562 »

Here, try this website:

http://www.vega-signaling.com/index.htm

The Notch Filter is Model # 330.

Dan
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Will
Posts: 6823
Joined: Tue Sep 04, 2001 4:00 pm

Post 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.
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arlojanis
Posts: 1055
Joined: Mon Jan 28, 2002 4:00 pm

Post 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.
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