[Heathkit] WAS Dumb speaker question NOW SB-303 tweak

[rbethman]

Glen,

I know I do the comparison either by signal generator - OR move the coax 
from the antenna from the RX-1 to either the FT-101B or perhaps a TS-820S.

That way I do not have to start down the "how much RF leakage" am I 
getting from the Signal Generator path.

Bob - N0DGN

On 2/28/2010 5:15 PM, Glen Zook wrote:
> What are you basing the sensitivity upon?  If it is the "S" meter reading then that is really not a good indicator.  The only way to compare would be to use a switch to be able to change the same antenna between radios and then tune in a very weak station.
>
> It has been my experience that the LDS (least descernable signal) on the SB-301 is well under 0.1 microvolts which is excellent.  In fact, the ability to receive such a weak signal is actually wasted because the ambient noise level on HF is considerably greater.
>
> The only way to really measure the sensitivity is to use a signal generator with a well calibrated variable attenuator.  Of course, you need to make sure that the alignment is correct before making the measurements.
>
> Glen, K9STH