[TenTec] Astron

[Stuart Rohre]

The Astron hum indicates it is pulling more amps as it would when the line 
voltage drops because of the heavy load of the hair dryer upon the circuits. 
Perhaps the hair dryer is on the same fuse or circuit breaker as the radio/ 
Astron circuit.

Loose laminations on transformers are also a cause of hum.  Tightening the 
mounting bolts usually takes care of that.  In extreme cases, adding mass to 
the metal cover may detune any audio resonances.

Stuart
K5KVH