Quote:
Originally Posted by John12868
Does anybody know at which serial number the R200 changed from OC series transistors to AF series?
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The R200 had AF117s fitted from serial no 70001 in January 1962.
The R500 is not that rare but sure is rare in good condition and much the same goes for the RT7 and RT8 models. The R200/R300s are far more common and one should be able to find a nice one without too much trouble plus plenty of reproduction parts are available for them and the RT1.
Howard
