[ARC5] "Curing Chirp in Command Transmitters" MO T-53A and B

[Kenneth G. Gordon]

I have two questions concerning T-53B: 

1) what, exactly, is the EFFECT on the VFO stability when T-53B is NOT 
used, and  

2) if T-53B is left in the circuit when AC is applied to the filaments, will this  
cause an AC hum to be induced on the VFO output signal?

Ken W7EKB