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Kanga US |
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R2Pro Module - Upgraded R2 - $115 (PC board set (includes 1 audio filter board) $25) The R2Pro is now back in production. Note that the R2Pro does not include the Local Oscillator (you supply) or either of the optional SSB or CW filters. I also have some board sets (that were submerged in the flood) that I am selling for $20 plus $5 s/h The R2Pro contains an LNA with tuned input and output, RF splitter, I and Q TUF-3 diode ring mixers, matched bandpass diplexers and audio preamplifiers, a 90 degree audio phase shift network, summer, audio bandpass filtering (wide SSB supplied - 3 and 1 KHz optional), and an audio power amplifier. Four separate PC boards are used so that each stage can be individually shielded. With an appropriate quadrature local oscillator (LM2 or UVFO recommended) the R2Pro module is a single sideband or single signal CW direct conversion receiver for any frequency between 1 and 500 MHz. The R2Pro is also an excellent last conversion stage in a superhet system. The wide frequency range of the R2Pro module permits construction of single conversion microwave SSB and CW receivers and up-conversion HF receivers without the usual limitations on IF imposed by the need for narrow band crystal filters. Specify the band you want when ordering the R2Pro.Click here for the paper given on the R2Pro at FDIM. Click here for the Documentation Package. Click here for a picture of the first R2Pro receiver I built. It's not pretty.... The UVFO is in the lower right Module pricing (includes PC board and parts. Layout, parts list, and schematic are on-line here.) LNA (specify band) - $12 |
