Originally Posted by tom-g
Could be dirty pots.
Take it to a tech and him give it a once over... clean up all the pots and chech it over well.
I have a beta bass amp made in the 80's. I recently had it cleaned and checked over after a few decades of neglect.
It works as it should now!
Probably just dirty pots... and the drive pots on that amp do tend to be a bit finiky...
Yamaha Bass club member 157 - BB1100s, BB605, Aria owner, Yorkville/Traynor member 62, Roscoe LG3000, Pedulla Rapture