[Hammarlund] Yaesu Rotor Problem

[Glen Zook]

I have "narrowed down" the problem source. 
Unfortunately, it seems to be at the rotor end and not
the control box end.  I took resistance measurements
at a "splice" in the control cable which is located
near the bottom of the tower (took loose the cable
back into the shack).  The Yaesu uses 5 wires.  Of
these 2 are used for the motor and 3 go to the
indicator potentiometer.  I had to splice the wire
when a squirrel decided to make a meal out of the
wire.

The 3 wires should be completely separate from the 2
wires.  However, I am getting a resistance between all
5 wires.  What I think is that the weatherproofing on
the connector that goes into the side of the rotor
itself has become compromised and corrosion has built
up causing the resistance (not a short but around 100
ohms).  I am going to have to climb the tower and
bring the rotor and the connector to the ground for a
complete cleaning.

The control wire has been in use for almost 35 years
at this location and for about 5 years before that in
another house in which I lived in this particular city
before purchasing the present abode.  I am going to
replace the wire while I am "at it"!  The wire "seems"
to be OK, but 40 years is definitely a LONG time for
use.

Glen, K9STH


--- Barry Fox <foxbw at comcast.net> wrote:

I have no experience with Yaesu rotors, but there is a
lot of info on their various problems in the
tower-talk archives. The mailing list addr is:
towertalk at contesting.com I am not quite sure how to
access the archives, however.









Glen, K9STH

Website:  http://k9sth.com


 
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