[Elecraft] K3 Sub-receiver use

[hb9ari]

Hello,

Before to order a sub-receiver for my K3 (#1212),
i would know if the primary use i've envisaged is possible:

RX/TX on main receiver on 20m for example, with
output power between 5 and 75W (JT65A mainly).
Sometimes, the auto-tuner in the K3 is used.

RX  on sub-receiver for 6m on a separated antenna,
(Preampli 6m Elecraft ON or OFF)  and IF output to
the (ordered ) P3 for band monitoring.

Thank you for information, because i'm not
clear with  hardware and firmware version
necessary for this "dual" band use.

My best 73,
Rudolf, HB9ARI