Moog MG-1 Slider removal/replacement

museslave · Post by **museslave** » Wed Oct 04, 2006 10:54 am

So, how complicated a process would that be? The filter modulation slider on mine is driving me crazy, and I've got to do something about it.

Has anyone here done the slider replacement on an MG-1 or similar? What does it require? Of course, I would take it to a qualified tech, but I don't think there are any in my town.

I also want to say that the more I play the thing, the more I love it. I might actually keep this little fellow! I really only bought it because I needed a synth that would fit in a suitcase for a gig in England, but I keep getting interesting sounds out of it! It is REALLY diverse in what it can do... I'm surprised every time I play it.

The polyphonic section, about which much has been said, is really a great compliment to the monophonic section, providing beef and detunement to shape the sound, even if you don't use it as a polyphonic section! (which I do... I have been able to learn how to make it sound very good... I'll post on YouTube at some point)

atkbg · Post by **atkbg** » Wed Oct 04, 2006 2:45 pm

How are you with a soldering iron? If this is your first undertaking, you may not want to. Its really pretty easy, though.

What is wrong with the slider? dirty? loose?
I just fixed mine by resoldering it.

museslave · Post by **museslave** » Wed Oct 04, 2006 4:46 pm

You know, I haven't a whole lot of soldering experience, but I'm very willing to learn! My step father used to be in electronics, and could set me up with some practice nicely.

The slider in question is loose, but it also only works for half of its length... I don't know if it's dirty, although that would EASILY make sense on an MG-1 that has had its foam removed... but the slider only works from halfway up to the top. And that half that DOES work is intermittent, which I suspect definitely has "looseness" as the cause.
I had this same problem with a slider on an Opus 3 I had... and it was ALSO the filter modulation slider! What gives? ; )

I would enjoy my MG-1 experience VERY much and probably never sell the thing if I had nice, smooth, even silders on it.

atkbg · Post by **atkbg** » Wed Oct 04, 2006 5:02 pm

Does is start to work halfway up (modulation amount small) or does it come in strong half way up ( modest amount of modulation to start)?

museslave · Post by **museslave** » Wed Oct 04, 2006 6:48 pm

atkbg wrote:Does is start to work halfway up (modulation amount small) or does it come in strong half way up ( modest amount of modulation to start)?

It comes in at about where you'd expect it to be, modulation-wise, at that point on the slider... and then, often I have to push it to one side to get it to work. (that's the obviously loose part)

TheLustyGhost · Post by **TheLustyGhost** » Sat Oct 07, 2006 11:50 am

I had very little experience soldering PCBs and it took me about 3 hours to do all the switches and sliders, including repairing a peeled-off PCB trace. It's pretty easy (nothing too tight or close to ICs) and you'll be a lot more comfortable soldering after you're done. Make sure you get a desoldering tool.

Also, the parts are pretty expensive. With shipping it ended up being just over $120 US for a full set.

museslave · Post by **museslave** » Sun Oct 08, 2006 7:38 am

Hey, thanks, TheLustyGhost!

What is the difference between a soldering tool and a desoldering tool?

OysterRock · Post by **OysterRock** » Sun Oct 08, 2006 7:58 am

museslave wrote:Hey, thanks, TheLustyGhost!

What is the difference between a soldering tool and a desoldering tool?

Both soldering and desoldering require the same tool, a solder iron. However, to desolder you will need some solder wick or a solder sucker.