Authored by VE3EFJ
14.1 VARIATIONS
The R7 and R7A was also used as a base for commercial applications. These units comprised the RR3 and the R4245. The latter receiver used a synthesizer instead of a PTO. Both of these receivers were commercial grade. The R4245 had a companion transceiver, the TR4310. This *likely* is the TR7 or TR7A in disguise.
The R7 used the NB7A Noise Blanker. I have had enquiries asking what the difference is to the NB7 used in the transceivers. I do not know for sure, but my guess would be that the NB7A was marketed for the receivers only and did not include the components to enable the signal path for transmit.
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