Shango has this up.
https://www.youtube.com/watch?v=e0DkojD6NBk&t=576s
I would check both cartridges specs. They vary wildly on output.
Odds are this one wants a low output cart. There is an Astatic
catologue on the net & surprisingly readable !
And yes NOS carts are going bad on the shelf. And other things
you wouldnt expect.
73 Zeno
LFOD !