Preselectors/Tuners, Preamplifiers, Noise Cancellers

Boost weak signals and reject out-of-band interference and images from 1.8-54 MHz. Boost weak signals up to 20 dB with low-noise MOSFET and bipolar transistors.

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!

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!

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

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 88-108 MHz FM broadcasters.

20-dB (adjustable) gain from 30-1000 MHz.
Improved reception for scanners with the Close Call function.
BNC connectors allow the unit to be mounted between the scanner and the antenna.

Bob's Pick...
RAMSEY WIDEBAND PREAMP: Here's a very popular accessory to bring in those weak, distant scanner signals!

If your scanner reception needs a little boost, this is the preamp to do it! Providing high gain at low noise, and operating continuously over 1 GHZ of spectrum, this signal booster can really make a difference in weak signal areas!

The WR-LNA-3500 Low Noise Amplifier is a ultra-low noise figure preamplifier designed to operate in the range of 30-3500 MHz. While it is ideally suited to WiNRADiO VHF/UHF receivers, it can be also used to improve sensitivity of most third party receivers.

For the discriminating scanner user who needs the best possible weak-signal amplification without amplifying the noise as well, this tiny (1” square) preamp fills the bill!

The LN4000 offers 20 dB (typical) signal amplification from 100-4000 MHz (-3 dB), at a low noise figure of only 4.5 dB.

The ANC-4 is an RF device that eliminates or reduces power line noise, computer noise, TV-generated interference, and other types of electrical noise. Connects right to the antenna connector of the receiver or transceiver to cancel locally generated noise before it gets into the receiver and affects the receiver AGC circuits. Reception of signals well below the noise level of the local interference is possible.

Adjust this attenuator in your antenna line to reduce nearby strong-signal interference on. Reduces all signals from DC-1000 MHz from 0 to 20 dB! Two F connectors provide convenient coax attachment

The BCST-HPF is a 7th order elliptic high pass filter designed to severely attenuate AM broadcast stations below 1700 KHz.

The BCST-LPF is a 5th order elliptic filter designed to eliminate AM broadcast from interfering with LF and VLF listening.