[Elecraft] k3 external speaker mono v stereo plug

[Don Wilhelm]

Jim,

It is better to use the approximate ship date posted on the Elecraft 
website listing of K3 Mods and Enhancements.
There can be a serial number differences between the factory ship K3s 
and the kit versions  - the factory built K3 are at the factory longer 
after the serial number has been assigned, so the ship date is a better 
reference.

OTOH, it is a simple matter to remove the top cover and look at the board.

73,
Don W3FPR

Jim Miller KG0KP wrote:
> Does somebody have an approximate serial number when the erferenced "Rev B" 
> KIO3 bd began to be used?
>
> Thanks es 73, de Jim KG0KP
>   
>