[TowerTalk] HD-73 Rotator issues

[Richard Karlquist]

On 2013-09-11 18:17, Dan Evans wrote:
> Talk'ians,
> 
> Just picked up an Alliance HD-73 at a hamfest.  The previous owner
> sold it really cheap, because it has a problem...
> 

A famous gotcha with this is that if the lamp is burned out,
the meter circuit doesn't work either.  The symptom will be
as you described, the meter never moves from the left peg.
BTW, replacements for the legacy lamp are still available
from distributors.

If the lamp lights up, check are see if there is voltage
on the meter.  If there is, the meter is bad.  I have an
extra meter if you need it, but there are two versions.

If not, one of the handful of other components is bad.
It is easy to troubleshoot from the schematic.  There
is no rocket science involved.

Rick N6RK