[Elecraft] K2 rev B low sensitivity

[Dave Sergeant]

Andy Wallace wrote:
>I would like to hear from anyone else on the List who can run that
>measurement. With a properly calibrated (by the manual) S meter, 
>what is your input level for S-9 signal with preamp on and off? 
>Thanks... 

I have just done this test on my rev A K2 (#2498) with the following 
results:

Test frequency 7002, CW 400Hz filter (the one I use all the time)
Generator Gould SSG220

Level to just illuminate S9 LED
Preamp off -63dBm or 159uV
Preamp on -78dBm or 28uV

Slightly worse than the ARRL figures, but they were possibly in an 
SSB filter, but taking into account the various errors seems in the 
same area.

Measuring the noise floor sensitivity is harder as my generator only 
goes down to -132dBm without external attenuation (and it can 
certainly hear that) so I have not done that.

I tend to use the preamp all the time, but my antenna (60ft long 
wire) is hardly receiver overloading stuff.

73 Dave G3YMC

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