PAR Filter Information: The HT series feature unprecedented fast recovery from the notch frequency. –3dB points are typically 1% of the notch frequency. These are asymmetrical notch filters that employ a miniature toggle switch to allow the end user to select which side of the notch requires fast recovery at a given time.

For example the VHFDN153HT has its notch nominally set at 152.5MHz. With the switch set left ( receive DC-151 MHz) the loss at 171 MHz is only –3dB. With the switch set right, the –3dB frequency is 154 MHz. This is in stark contrast to other commercial notch filters whose 3dB points are typically +/- 10 MHz.

Reduce or even eliminate scanner intermod and image interference from those powerhouse 88-108 MHz FM broadcasters.

Restore quiet monitoring on your scanner, drastically reducing that incessant "bleep bleep" interference from local paging transmitters. 152 MHz pager interference. Reduce Interference by 35 dB!

Restore quiet monitoring on your scanner, drastically reducing that incessant "bleep bleep" interference from local paging transmitters. 158 MHz pager interference. Reduce Interference by 35 dB!

Paging interference at 462 MHz is a growing problem among scanner listeners as well as two-way communicators. PAR has responded by releasing this improved notch filter
 

Reduce or even eliminate scanner intermod and image interference from those powerhouse 162 MHz weather broadcasters
 

The DSP-599zx, with highly acclaimed digital noise filters, is part of the latest generation Timewave DSP filters. Incorporating the newest high speed CPU, the extra power gives the user unparalleled features and field upgradeability for the future.

This new filter removes strong-signal images and intermod from non-air band transmissions like land mobile, repeaters, weather, and paging from your air band scanner!