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VHF & UHF Radio Equipment
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R307 UHF FM Receiver


Features include:

  • Dip switch channel selection
  • Low noise synthesizer for repeater service.
  • Excellent sensitivity and selectivity.
  • Commercial grade tcxo for tight frequency  accuracy in wide range of environmental  conditions:  2ppm -30 to +60°C.

The R307 UHF FM Receiver is a tough, commercial-grade, receiver which answers the need for the most demanding applications.  It has very good sensitivity and selectivity.  It is ideal for voice operation in repeaters and voice links. Used with our data demodulators, it makes a handy link for computer controlled equipment or a reliable telemetry link in place of expensive phone lines.

The R307 is an offshoot of our popular R306.   The difference is the ability to change channels at any time using a dip switch.   We program the base frequency for the desired band in the microcontroller, and you select the frequency within the band by setting a dip switch.

This new receiver proudly combines the best features of its highly acclaimed predecessors.  There are some jobs a transceiver grade receiver just can't do, at least not well. That's where reliable Hamtronics® commercial quality receivers come in!

The R307 retains all of the popular features Hamtronics® receivers have been noted for.  It uses triple-tuned circuits in the front end and excellent crystal and ceramic filters in the i-f with steep skirts for close channel spacing or repeater operation. The i-f selectivity, for instance, is down over 100dB at ±12 kHz away from the carrier, which is 40-50 dB better than most transceivers.  Low noise fet's in the front end provide good overload resistance and 0.15µV sensitivity.  You won't need a preamp with this receiver!

The R307 is our 10th generation uhf fm receiver, and it packs in features you've told us are important to you during our 50+ years of designing receivers.  It's up to the difficult jobs you've told us you have.  It features a positive-acting, wide-range squelch circuit and additional output terminals for low-level squelched audio and discriminator audio as well as COS.

Able to hear weak signals, resistant to intermod, desense, and adjacent channel interference, easy to interface.  Isn't that what you need for your demanding applications? 


  • Frequency Ranges:   can be supplied from 400 - 470 MHz
    (other ranges may be possible on special order)
  • Frequency Stability: ±2ppm over a temperature range of -30°C to +60°C.
  • Sensitivity (12dB SINAD): 0.25µV
  • Squelch Sensitivity: 0.15µV
  • Modulation Acceptance: ±7.5 kHz
  • Adjacent Channel Selectivity: ±6kHz at -3dB, ±12 kHz at -100dB!  (Narrower or wider bandwidth available on request)
  • IF Filters: 8 pole 10.7 MHz crystal filter plus 455 kHz ceramic filter.
  • Audio Output: 1 Watt (8 ohms).
  • Operating Power: +13.6Vdc at 38-200 mA, depending on audio level.
  • Size: 4 in. W x 3 in. D x 1.25 in. high
  • Shipping Weight: 1 lb.


R307 Factory Built Receivers ... $349.00

Note:  Please specify the frequency you want to operate on so we can tune the unit for you.)

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

Tuning Tool.  Hex tool used for alignment...$6.00
RF plug & cable to connect to board.
A40 115VAC/12Vdc Power Adapter to power this unit ...$10.00