I measured the voltage on the CAT port rig at the rig's pinout. Under 1v. \
I found the schematic in the file section. File?ft857 technical supplement, part one, page 25, layout A, section A3 has part F1001 located.
Measuring continuity in circuit, it is OPEN.
So I believe you all are right on. Now to summon up the courage along with steady hands and younger eyes!?
Mike / KA4CDN
