i just brought a second hand marshall jcm900 4100 head and cab off ebay, and was aware at the time of purchace that there were problems with it. i was laso aware that the valves (tubes) hadnt been changed for nearly five years which i know is a long time. when i collected the amp and got it home and started to strum away, i realised the the b string and top E string sounded kinda out of tune, no matter what fret i played. i was just wondering if this was a sign that it was time for a change of valves (tubes)
also, the rewverb unit from the amp was removed by the previous owner, i was also wondering if it is possible to buy spring treverb units on their own, does anybody have any URLs they care to share with me?
also any other information regarding the maintainance and general care of valves (tube) amps (as this is my first one) would be grand!!!
long-winded i know but if anybody could provide assisstance in one of those areas, i wsill be more than grateful