lrl compass finder 42 mod

[petros047]

I have in my hands this locator and my goal is to improve it.
Some one who have the same told me that use freq generator and separate the antennas ,leave one in the detector housing the center antenna and use the other antenna in his hand and he said that work find.
I didn't see it how it is work and it is not possible to meet that person
So what do you suggest me to do with this locator?
As you can see in pictures there are no power transistor no rf circuits only mc.
Is any schematic available to build something from the beginning?
What you guys do?
This detector it is not mine my job is to improve it if it possible.