[Elecraft] [K3] Sub-rx wont work

[DM4iM]

Guys, the Main-RX and TX of K3 #2878 are up and running, thanks to the
hints from Markus and Chen.

But not the sub-rx.

All plugs mated
Checked the tmp-cables
Performed the calibration
No err-msgs
Sub-RX in config-menu set to *yes, installed*
ant = bnc

no receive, only noise like there is no antenna connected,
noise characteristics change with selected filter (Bandwith/shift)

Faint signals from *strong* stations.

Signals from my K2 sound ok when i transmit into a dummy load and
receive them with the K3 sub-rx.

So the sub-rx is not dead, but deaf.

The K3 has sub-rx, KXV3, equal filters ssb/cw on both rx's , *no* KAT3.

Where to begin the troubleshooting?

Martin

-- 

73, DM4iM

K2 #2706 , K3 #2878