[TenTec] Omni VI Rubbery crud on PCB

[Ken Brown]

My Omni VI had some dark brown rubbery stuff on the XTAL osc and BFO
printed circuit boards, It is sort of like rubber cement and reminds me of
similar stuff I found in Kenwood TS-440s. There is also blue green copper
corrosion on the edges of the rubbery crud along with with white powdery
stuff. I think the powdery stuff may be mold or fungus. I have spent
several hours on each board trying to remove it as best I can.

It is not on every board, and not on any of the boards in an older Omni VI.
I am wondering if it is something that was put there by the Ten-Tec
factory, or if some previous owner did it? I guess it's purpose may be to
dampen possible microphonics in the oscillators. It definitely caused some
undesirable, unintended consequences in a humid climate.

Has anyone else seen this in an Omni VI?

DE Ken N6KB