Talk'ians,
Just picked up an Alliance HD-73 at a hamfest. The previous owner sold it
really cheap, because it has a problem...
Anyway, the rotor turns fine but there is no direction indication on the
control box. The needle just stays all the way to the left, it doesn't move
when the rotor turns. The box lights up, the rotor turns, but no direction
indication. I guessed it would be a simple fix, maybe even a problem with
the wiring, but I haven't found the issue yet.
What I did do was go through the trouble shooting section of the manual.
Basically, it walks you through the what the resistance values from pin to pin
of the rotor. All of the readings were normal, so I would rule out a problem
with the rotor. That leaves a problem with the control box. I opened up the
box and looked for obvious problems, but no such luck. I am guessing it may be
an issue on the circuit board near the meter, but I haven't pulled the board
yet. I see a few diodes and resistors on the board to check out.
Before I completely dismantle the control box, has anyone run across this issue
before? Is there a common problem I should be looking for? I'm not an
electrical engineer, but I'm pretty good with a DVM and a soldering iron. At
least I think I am better with a soldering iron than whoever built this control
box... (connections have big globs of solder...)
Any tips appreciated. I'm still hoping to get it put up before the VHF contest
this weekend...
73
Dan
--
K9ZF
Amateur Radio Emergency Service, Clark County Indiana. EM78el
former K9ZF /R no budget Rover ***QRP-l #1269
Check out the Rover Resource Page at:
<http://www.qsl.net/n9rla>
List Administrator for: InHam+grid-loc+ham-books
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