{Collins} 75A4 Sensitivity Measurement



I am attempting to measure the sensitivity of a 75A4.  The manual states 1
uV for a 6 db S/N (S+N/N?) ratio.  It does not state anything about
modulating frequency.  I find that my uV readings at 400 Hz are
approximately 1/2 of those at 1000 Hz.  Does anyone know which frequency is
correct to use?  I am using a HP 606B signal generator and a HP 400FL AC
voltmeter.

David
KC2JD/4


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