[amsat-bb] Another first: rotor problems
hans.bx2abt at msa.hinet.net
Mon Jun 24 13:34:57 UTC 2019
There is a first for everything. So today for the first time in my 10
years as an amateur radio operator I experienced that my KR-400 rotator
(partially) stopped working. It has not been in use for 10 years, only
the last 8 months and the motor was cleaned and greased before the
install. Before I start dismantling everything I would like to see if
any of you have any good advice.
The problem --- it will turn right, not left.
What I measured --- between terminals 5 and 6 (right turn) I measured 31
Volts, which is normal. Between 4 and 6 (left turn) only 21 Volts. Rotor
not connected to the controlling box when measuring.
My thoughts --- must be in the controlling box. However, there is simply
nothing there in the circuit that I think could act up. From the
transformer one terminal carrying 29 Volts goes to two switches. The
other terminal is neutral. There is the light bulb between the two
terminals and a 70 uF/50V capacitor between the two switches.
I could be entirely wrong, so spill any info and/or tips that you can
give me, here. Cheers,
More information about the AMSAT-BB