| http://www.w3.org/ns/prov#value | - The signal output (f' +0.2 mc. s.) of the voltage controlled oscillator 74 is applied through a band pass filter 191, adapted to reject signals other than f +0.2 mc. s., to the primary base electrode of transistor 189 where mixing with the GAA signal (f +O.4 mc. s.) occurs.
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