R303 VHF FM Receiver
VHF FM RECEIVER USES LOW NOISE FREQUENCY SYNTHESIZER
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 R303 is our 9th generation vhf fm receiver, and it packs in features you've told us are important to you during our 40 years of designing receivers. It's up to the difficult jobs you've told us you have. 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. This new vhf receiver proudly combines the best features of its highly acclaimed predecessors. There are two differences between the R303 and its predecessor, the R302. The volume and squelch controls are trim pots on the board rather than panel mounted pots. Most customers find this provides easier mounting and keeps controls away from prying hands. The synthesizer uses a microcontroller which has the frequency directly programmed into it at the factory so there are no dip switches to deal with. For those applications requiring more than one frequency, we can actually program in up to four channel frequencies which can be selected by jumpers on the board or an external switch. The R303 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 excellent sensitivity. You won't need a preamp with this receiver! By careful engineering and economies of scale, we were even able to keep the price about the same as crystal controlled receivers sold for, even several years ago! In fact, you don't need a crystal oven; so it saves you $45 over a comparable crystal controlled unit. Able to hear weak signals, resistant to intermod, desense, and adjacent channel interference, easy to interface, instant channel frequency setting. Isn't that what you need for your demanding applications? Specifications:
See what customers have to say:I just wanted you to know that I'm really impressed with my new R-302 receiver. My 12 year old R-301 is an excellent receiver but the new R-302 pulls stations in loud and clear that were barely a whisper on my R-301. I don't believe there is any receiver out there that can top this one. It seems that you guys took receiver sensitivity to the theoretical limits. ...J. B., Tannersville PA The R303-2 receiver I ordered and installed is fantastic. Thank you so much for helping me meet my time frame goals by having a new receiver at our repeater site by the date I requested. ...Eugene C. Patrick, NA8I I'm very impressed with the receiver. Great selectivity (no adjacent channel interference), excellent sensitivity (no white noise), and surprisingly good audio quality. I'm very happy with its performance. Thanks for recommending it....James Bade, Mount Pocono, PA |
