![]() ![]() On the reverb rca cable, right below where the rca cable comes out of the head going down to the reverb can, there is a ferrite ring that the rca cable is looped thru, if that ring is gone or broke, you will also get a hum. ![]() On the Valvestates, if you own a soldering station make sure the amp is unplugged and the caps discharged they will still give you a jolt.Ĭheck the solder connections on all the sockets, pots, output transistors, cement resistors, and the big power caps, I had to repair my 2nd VS265 about 10 years ago and it was all solder connections and it was cold solder joints.Īnother thing, man I just keep adding them as I think of them, 1) The resistance of tube filaments changes as the filament wire warms up, 2) When an amp first fires up, it takes a bit for caps to charge and everything to settle in.īut I'd suspect the tube first, if not then a 5201 IC or cap we can track down This is for (at least) a couple of reasons. It IS common for many tube amps to have a slight hum at start up. Also for: Valvestate vs232r, Valvestate vs235r. Valvestate VS230R musical instrument amplifier pdf manual download. ![]() Did you try changing the 12ax7? they are known to hum in these amps after they get older, also when you insert the footswitch into the back on the amp does the hum decrease? View and Download Marshall Amplification Valvestate VS230R handbook online. ![]()
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