Julie in Seizure (emanican) wrote in guitargeek,
Julie in Seizure
emanican
guitargeek

Marshall MG Series 50DFX Amplifier

Hi,

I have a  Marshall MG Series 50DFX amplifier, which isn't that great to be honest. It's ok for home/band practice but that's about it... Anyway, the master volume pot is very crackly and when turned the volume jumps up and down very rapidly. When left alone afterwards the volume is normally very quiet, which means I have to turn it some more to find a volume which is usable.

After searching around, I have managed to find out that this is probably due to some gunk in the pots. I have bought myself some contact cleaner but am unsure as to how I should go about this. At the risk of sounding very naive here... Do I literally just yank off the knobs and give what's underneath a spray..? Or am I going to have to take apart my amp to get round the back of the pots? I have never done this before and, although the amp is nothing special, I don't want to fuck it up unnecessarily. Has anyone got any ideas or advice?

Also, I am looking to get another amp, a valve if possible. I haven't got a great deal of cash available, £500 at a push. Has anyone got any suggestions/recommendations that I could look into? I play mainly alt-rock type stuff.

Thanks,
Matt.
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  • 4 comments
You'll need to take the amp to bits so you can get to the inside.
The pots will be PCB mounted which makes it a bit of a pain as the bit you need to spray the contact cleaner onto will be facing the board. So you'll need to turn the whole upside down and spray into the whole at the bottom of the pot and waggle.

Amp wise £500 is a good amount if you're going second hand.

Loads of marshall combos for less than that sort of money. Buying new there's a whole bunch of chinese made stuff around these days for less than £500, which can be quite good but tend not to have much character.
If you like the marshall sound old JCM900's are better value than the DSL's or TSl's. On that front I wouldn't bother with the DSL 401... it lacks balls.
easiest way to deal with crackly pots (works about 80% of the time):
roll them from one extreme to the other real quick a few times between your hands. this tends to dislodge gunk/dust/etc.
I'd go with one of the Blackstar HT series amps.
good article! thanks!