Midland 77-882 squeal/oscillation on rx

[Uncle Ronnie 336]

This radio was very good looking cosmetically but was in my fix pile because it didn't have any modulation and real muddy audio so 90% of the problem was solved with a electrolytic recap. The radio is kicking a good solid 18 with a stock final and I did the NPC mod. So my transmit audio has no issues my issue is when I have the volume up a little bit and someone's voice comes through and it starts oscillating. Just looking for pointers on what to attack because this radio is about to be really sweet

 

[Uncle Ronnie 336]

By the way I have two more 40 channel chassis radios to recap with the same internals made by RCA and GE so any knowledge I pull out of this will be applied to Future recaps. And just this last week I brought a bunch of 23 channel radios back to life including a cobra 26 so I've been busy my friends I just haven't been posting about it too much