[Boatanchors] Collins 51J-4 ferrite tuning cores

[John Flood]

Greetings,

Last night I started working on a 51J-4, actually its a Beckman labled unit.  
There are three broken ferrite tuning cores.  One in the KC deck and two in the 
MC deck.  Are these all physically the same or is each core designed 
differently?  Anyone have some available for sale or trade?  I think I will need 
more than three as I have another 51J-4 with a couple of broken cores 
thats stashed away as well.

John Flood
KB1FQG