R451 UHF FM Receiver

The R451 meets the same high standards as the R100, except it is designed for the uhf bands. It uses two low-noise dual-gate fet's in the front end with six high-Q tuned coils for outstanding sensitivity and selectivity.

You won't find any better adjacent-channel selectivity anywhere the R451 uses a sharp 8­pole crystal filter plus a ceramic filter.

Features like these make it an excellent choice for repeaters, links, telemetry, and other critical applications.

R451 SPECIFICATIONS:

• Sensitivity (12dB SINAD): 0.2uV
• Frequency Range: See price list below.
• Adjacent Channel Selectivity: ±6kHz at -3dB, ±12 kHz at -100dB!  (Narrower or wider bandwidth available on request)
• Audio Output: 2 Watts (8 ohms).
• Operating Power: +13.6Vdc at 36-100 mA, depending on audio level.
• Size: 4 in. W x 3-7/16 in. D (plus pot. shafts)
• Shipping Weight: 1 lb.

See what our customers say about these modules:

I built your UHF crystal exciter and UHF receiver and they work GREAT! I am very pleased with the performance of each module. I am building a split site 6M repeater using most of your modules. Thanks for your help.   ...Roger Myers, N9JHQ, Elkhart IN

The 440 and 220 transmitter and receiver boards we purchased from you years ago are still in operation today and have been working at 100% the whole time. They are totally reliable and even working under some harsh weather conditions. The crystal heaters we installed in one location on the receiver boards keeps the frequency rock solid. The downtown repeater site has two UHF receivers, one 220 receiver, the main 220 transmitter exciter board plus 10 watt amp - and they all perform flawlessly all the time. Even after years of use to this day, they have never stopped working or drifted off frequency. We are also using ID boards, timers boards and so forth on two remote receiver sites - and they are all as accurate as the day we installed them over ten years ago. Good engineering designs - good going! Thanks. ... Tom Mogan, AA6IP; Sacramento, CA

PRICES:

R451 Receiver Kit for 420-475 MHz ...$199.00

R451 Receiver, wired/tested, for 420-475 MHz ...$349.00 *

R451 Receiver, wired/tested, for 390-420 MHz ...$349.00 *

* Note: We do not normally stock wired units as most customers use synthesized modules now; however, they are available on special order with 2-3 week dely.

Crystals, commercial grade, for all units ...$25.00 

A40 115VAC/12Vdc Power Adapter to power this unit ...$8.00

Narrowband Filter Option: for applications using 2.5kHz deviation instead of 5kHz .... $30.00