Posted by k6dgw on Jul 01, 2020; 4:54pm URL: http://elecraft.85.s1.nabble.com/K3s-noise-figure-spec-tp7662748p7662771.html
My, how things have changed! In the mid 60's in SE Asia, in a mobile
troposcatter system [AN/MRC-98], we had 4 receivers that used Western
Electric 416B planar triodes with the amazing NF of 3.7 dB at 460 MHz.
73,
Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County
On 7/1/2020 6:39 AM, Jim Miller wrote:
> The PR6-10 was the latest released preamp as an accessory for the K3 prior
> to the K3s with its built in preamp. They are likely very similar.
>
> Here's the manual for the preamp:
>
> https://ftp.elecraft.com/PR/Manuals%20Downloads/PR6-10%20Owners%20Manual%20Rev%20A.pdf >
>
> NF is claimed to be 0.7db typical.
>
> 73 and stay safe
>
> jim ab3cv
>
>