[R-390] Z503 replacement

[Perry Sandeen]

List,

Wrote:  I have to say that whenever I take a can cover off, (Only two - both on the IF deck.), that these would be very difficult to make by ourselves. 

It is a PI-Wound coil, and has a resin around and over it - PLUS - it has a ferrite cup that the resin is holding on VERY dearly with.

Bob,

I was somewhat aware of the complicated construction.

Is it possible that this was an extremely over-engineered part? 

My question really was: why can’t a satisfactory electrical equivalent be made out of components we can buy?  After all it is a 455 KHz part. 

I’d rather make one or two up for spares now, even if I never need them, than to have to scrounge up a replacement for a dead one in the future.

Has anyone on the list pursued an alternative replacement method or made one?

Regards,

Perrier