The Icom IC-22A is crystal-controlled, so has ultimate flexibility (at the
price of crystals).
The Icom IC-22U came after the IC-22S (23 channel with diode matrix board) --
I had the 22S one in late 1970s (popular unit at the time).
Generally, I have seen them sell on eBay for ~ $15 to $50
Keep in mind that the 22S and possible the other variations had a
problem of intermittant solder joints on the steel pins that were used
as feedthrus on the circuit boards.
Burt Lang
Greg Beat wrote:
The Icom IC-22A is crystal-controlled, so has ultimate flexibility (at
the price of
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