On Oct 30, 2011, at 12:53 AM, Ron Ries wrote:

3) Last question: With RF gain fully CW on the R4B the ambient (no signal) noise level is 3-4 S units above where the TS-850 and TS-480 indicate the noise level is for the same antenna system (trap dipole up 27') and RF gain full on. Is this an indication that tube radios have a higher sensitivity to atmospheric noise? With the RF gain fully CCW the indicated noise level on the R4B is comparable to the newer radios with RF gain full on. Not sure what to make of this.


Between the time Kenwood made the TS-430 and the TS-450, the Japanese standard for S meter readings changed.

Assume that the Drake was calibrated to a different standard.

Geoff.


--
Geoffrey S. Mendelson,  N3OWJ/4X1GM
My high blood pressure medicine reduces my midichlorian count. :-(














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