[Amps] SB220 tune cap

[Paul Kraemer]

Can someone please enlighten me on two different PA tune capacitors used in
the SB-220?
I have a 220 I am starting to rebuild and seeing initially that someone had
"messed" with the PA tune cap I picked up a very clean replacement on ebay.
It was also mentioned that it was the "later" version PA tune cap.
The two look similar except the "newer" one appears better quality and has
more plates.
Any other differences in the tank circuit to go along with that?
Thanks
Paul K0UYA