I got my plexi used and now the tubes are starting to go, today I experianced volume shifts and strange pops and computer like sounds when I used distortion. I think its time for a retube, when I opened the amp they guy had Svetlana's in, I was wonder if those are a good replacement, also when I looked on musiciansfriend they have all these versions of the EL34 that I need, does anyone have any tube recommendations? According to marshall my amp needs Pre-amp Valves 3 x ECC83
Power Amp Valves 2 x EL34. Thanks.
