Profile: Hamtronics, Inc. offers commercial and amateur VHF & UHF radio equipment. We specialize in VHF and UHF RF design, with particular emphasis on repeaters, & on voice control and telemetry links. We use our engineering expertise to manufacture communications equipment, and sell direct to the end user. The T301 VHF FM exciter is a tough, commercial-grade, low power transmitter which answers the need for the most demanding applications. It can be used as a stand-alone unit, or as a driver for our class-C power amplifiers. It is ideal for voice operation in repeaters and voice links. The R139 is a very sensitive wideband FM receiver, optimized for reception of NOAA APT and similar weather facsimile images on the 137 MHz band. It can be used with any demodulator and software. The R139 is designed from the ground up for optimum satellite reception, not just an off-the-shelf scanner with a shorted-out IF filter. Scan circuit and tape recorder control output allows to automatically search for, and record signals as satellites pass overhead, even while away from home. This is a new version of our long-popular TD-3 module, with several new features, including crystal control for precise tone accuracy, and a convenient DIP switch for tone selection without test equipment. It covers all standard sub audible tones.