Someone recently asked about the MP putting out a brief RF power spike when
keyed that trips out Alpha amps.
I just uncovered a Yaesu Tech bulletin on this topic. It appears to apply
only to very
early units: Lot 003 and before. (Lot # is the first digits after the
letter in the serial
number). The Yaesu file number is TB-9541. It's a simple mod that just
changes
the value of one resistor on the AF board. R3089 is changed from 4.7k to
2.2k ohms.
73, Tyler K3MM
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