[Elecraft] RST or S - meter readings?

[Geoffrey Mackenzie-Kennedy]

David Pratt <david at g4dmp.co.uk> wrote:

> FWIW the external plug-in Eddystone S-meter (Cat.669/E)for the 640 has 
> printed on the scale "1 DIVISION = 4db", OTOH the internal S-meter on my 
> 680X says "1R = 6db".
 ------------------------------------------------------------

Interesting, the 640 manual I have refers to the external S-meter ( no Cat.
reference) as a 200 uA full scale deflection meter, and then goes on to list
S units from 1 to 9 in terms of current indicated quote "based on a figure
of 6db change per unit" unquote, after the meter had been set to zero with
the "aerial and earth terminals shorted". From this and your comment it
would appear that there were two versions of  'S' meter used with the 640
based on different values of S unit increment.

73,
Geoff
GM4ESD