[Collins] Broken 10M coil core on 310B

[Bob Spooner]

Last night I found the reason why I could not tune the 10M multiplier stages
for adequate grid current. One of the cores was broken. Does anyone know
what kind of adhesive would be good for repairing it or if a replacement is
available? I think the material is powdered iron rather than ferrite, but
I'm not sure.

 

I may also have a problem with one of the 15M cores because the grid current
is "jumpy" when I tune it. Are the cores all the same material, or does it
vary by frequency?

 

73, Bob AD3K