[Elecraft] K3 S Meter

[Geoffrey Downs]

A couple of years ago there was some correspondence on the reflector about 
whether an S unit is 6db or 4 db and there appears to be historical 
precedent for both but I have looked at the archive and can't find where it 
rested as far as the K3 is concerned. It occurred to me while recently 
re-calibrating my S meter with the XG2 that if, in accordance with the 
manual, you set S9 to be 50 microvolts and adopt 6 db per S unit the reading 
for 1 microvolt should be between S3 and S4 (S3 being 0.78 microvolts and S4 
1.56 microvolts by my calculations). For practical purposes S3 is probably 
close enough rather than "about S2 or 3" as shown in the manual. Or is it 
more complicated than that? My arithmetic is not up working out how many S 
units one microvolt would be at 4db per S unit but I suspect it would be 
further away from S2 or 3. Anyone care to comment?

73 to all

Geoff
G3UCK