TM 11-6625-1559-12
bly caused by the existence of hum voltage at
local oscillator and proceed as follows to reduce
the EXT DET jack. Determine if the hum volt-
or eliminate this hum voltage:
age originates in the local oscillator stage of the
(1) Make up a special test cable consisting
of two separately shielded leads, or two leads
If the hum stops, restore the operation of the
in an individual shield.
3-10