[Elecraft] K4 Exref?

[Wayne Burdick]

Standard. 

73,
Wayne
N6KR

----
elecraft.com

> On Oct 15, 2019, at 7:06 PM, Jim Miller <jtmiller47 at gmail.com> wrote:
> 
> I see there’s a external reference knockout on the K4 back panel but is it a option or is the feature part of the base K4?
> 
> 73
> 
> Jim ab3cv 
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