[IRCA] Wobblers and a possible explanation

[Charles A Taylor <MWDXer@xxxxxxx>]

I see a possible causes for the Wobblers.

It's common among tube-type transmitters that, when the oscillator tube 
reaches the end of its useful life (when the transconductance drops below X 
micro-mhos), the inherent feedback inside the transmitter will cause the 
transmitter to "take off" and oscillate at some frequency near the assigned 
frequency. The station will sound about normal, but the carrier frequency 
will be a few kHz off and "wobbulate," or vary with a frequency-modulated 
characteristic caused mainly by bass components of the audio modulation.

If the 1100 Wobbler kicks down at its extreme frequency deviations, betcha 
it'll pop up FMing a few kHz from 1100.

Jest mah opinion. Take it or leave it, sez I.

Charles


        -----
Charles A Taylor, WD4INP
Greenville, North Carolina  


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