Models 70 and 90 Intermittent Operation
In
the majority of cases it will be found that this condition is caused by
an intermittent open in the .01 mfd. audio coupling condenser. Examination
of the small wires which make contact between the internal parts of the
condenser and the terminals on the bakelite housing will usually show that
this wire is solid. The condenser should be replaced with the later type
having the stranded wire instead of the solid wire. [The condenser to wire
lead connections were the culprit. Using a new style capacitor here will
suffice.]
In
addition to this fault, it will sometimes be found that the bakelite terminal
strips on the side of the tuning condenser are loose. Tightening the screws
which hold these strips will correct the condition entirely.
From the Philco Serviceman - March, 1935.
