You can't tell reliably by just looking at the serial number. My FT-847 has an "old" serial number and originally had the unidirectional firmware, but when I sent it to Yaesu for servicing (early in its life) they updated the firmware to the bidirectional capability. Unfortunately, I am almost certain that they no longer offer that service.
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On Tue, Mar 6, 2018 at 9:37 AM, Erich Eichmann [email protected] wrote:
Hello, Does somebody know whether one can recognize by the serial number of the FT-847 whether it is an old, uni-directional or a newer, bi-directional vrsion? A user here in Germany has two FT-847 with serial numbers 3M840064 and OE320084.
73s, Erich, DK1TB
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