Someone linked me to this post:
https://www.electro-tech-online.com/threads/2n30809-dual-fet.104271/?highlight=#post851692Apparently those FET's are a common problem, then he I guess isolated an issue with a Hybrid encapsulated IC
which is likely unobtanium.
When the scope is on a short time, the issue is not very prevalent, but seems the longer its on the
worse it is so it could be heat related.
2N3809 (Q23a/b) looks like a typo on the drawing (pg 38/39). Not sure if thats a dual FET....symbol looks wrong.
Guess I will have to eyball the board and see whats there.