[TenTec] Aux Receiver input

[Dick Williams]

Does anyone know if the this jack is grounded during transmit or otherwise 
disconnected from the receiver?
I took a look at the schematic and I see there are some relays in line, but 
I am not sure what they are for.

I have been using C & S Engineering Front End Saver, between my Beverage 
antennas and the aux rec input, and am not sure if I really need it (needed 
it on the Yaseu FT-1000).

Thanks

Dick K8ZTT