[Elecraft] Re:New Crystals or Not

[Larry East]

At 09:39 AM 10/30/02 -0600, Paul Jensen wrote:
>IMHO, some test of total receiver gain is really needed.  This would show
>if the crystals are a matched set.  A poorly matched crystal set would
>have low receiver gain.  The spectragram just shows the filter shape, not
>the absolute gain of the receiver.

One easy test would be to look at the increase in attenuation as the filter 
width is decreased from, say 1000 Hz to 200 Hz or so. This can be 
determined using Spectrogram. If it is more than 4-6 dB, then a new matched 
set of xtals should help.

L.