Guthman Diversity Coupler

[Dave]

Anyone had any experience with this or other units from this supplier ?

Coupler was marketed as an anti fade device.

[Norman S Braithwaite]

I've never seen or heard of the Guthman diversity coupler but upon inspection I can assure you that having no tuned circuits prior to the diversity capacitor, it simply passes the signal from the antenna providing the stronger broadband RF signal to the coupler.  If used after a pair of balanced preselectors (equal gain) with several tuned circuits each, it may function as intended.

Norman