[ARC5] Quick sensistivity comparison

[Kenneth G. Gordon]

On 13 Jun 2013 at 10:04, Glen Zook wrote:

> Actually, tube-type ("valve") receivers routinely give better LDS /
> MDS (least descernable signal / minimum descernable signal) signals
> than solid-state equipment.  Things like phase noise are definitely
> higher in "modern" solid-state equipment.  Now, generally for
> operation on MF and HF, the ambient noise levels on the bands negate a
> lot of the LDS / MDS.  That is, the noise level is often substantially
> above the weakest signal that the receiver is capable of receiving.
>  As such, the improved sensitivity is not needed when an antenna is
> connected to the receiver.
> 
> I routinely get LDS / MDS level of well under 0.1 microvolt (and the
> leakage from the generator is extremely low) on receivers like the
> Collins S-Line, Heath SB-Line, Drake 4-Line, etc.  Even on general
> coverage receivers like the HQ-140X, SX-100, etc., the LDS / MDS is
> often below 0.1 microvolt.   Glen, K9STH

Thank you, Glenn. :-)

Ken W7EKB