N4UE asks: > The radio appears to be a R-390A with extra 'boxes' on the back. I have > the metal tag that states... "R-1891". If you really mean R-1981/TSC-25, that's a 390A with extra jacks on the back to hook up magic electronics to the various LO's/BFO's/PTO outputs and the re-inject a correction frequency for extra stability. Tim.