Hey there, first time posting, sorry to the admins if I did not put this in the right catagory in advance. So, about five years ago I bought a lightly used Ampeg BA 115 from my local music store. I enjoyed it without any problems for about one year and now I can't play for more than 30 minutes without getting super frustrated. What is happening as far as I can tell, is once my amp warms up, the input jack expands ever so slightly and disrupts the connection. I can temporarly remedy it by adding horizontal pressure to the cable mounted in the input. Once I let off though it crackles a lot and my bass sounds very distant. I have taken off the metal housing and looked at it and there are no obvious flaws. Can anyone please help me with this without me dropping a couple hundred dollars on a professional repair? Thanks in advance for any advice as it is most appreciated.