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Shuttle 6.0 Volume issue

philter25

philter25

Mar 26, 2010
297
3
Germantown, MD
#1
Just wondering if this is common.... when I change the master volume, gain, or channel volume on my Shuttle, it makes a crackling noise.

Say I am playing live and need to turn up, I cant just hit an open string and turn the volume or gain knobs as it crackles before arriving at the new volume setpoint.

Once its at the correct volume and settings, it sounds fantastic. Is this common?
 
#7
Yeah, that just smells like either bad or dirty volume pots. If it's just cleaning needed, the repair that should be relatively cheap at your local music store.

EDIT: You can also try turning that one pot back and forth a whole lot to try to clean it mechanically, but you run a slight risk of making it worse, if it's loose gunk in there
 
#9
When my Shuttle 6.0 made any noise (that it ain't supposed to) -a crackling, albeit, not from turning the volume but from any vibration- it was a simple fix of cleaning the fx loop sockets. A quick spray of de-oxit & cycle the fx loop with a jack plug & all was fixed.
I'd bet, if your prob ain't exactly this, it'd be similarly easy to fix.
Normal???? Mine's abnormal then :)
 
#10
+1. It was explained to me this way by a reliable source...

"Some of what you are hearing is the wiper fingers causing microscopic changes of resistance and on a wide bandwidth amp with potentially high gain, this might be audible with signal. If it's quiet without signal this is not a symptom of a dirty pot or DC offset on the wiper."



KJung said:
I believe this is normal on the Shuttle amps... a slight scratching type sound if you turn the master while actually playing.
Click to expand...
 
#11
+1 Rod. I only suggest taking it to the store to have it done if you aren't a bit familiar and comfortable with popping the lid on your amp, because there's sometimes a couple places you don't want to touch at the same time. But even at the store, they're just going to spray some cleaner in the pot and then wiggle it back and forth.
 
#13
I have new Shuttle 6.0 and it exhibits the same behavior. The pots have detents, they are not smooth like most. It's the "in-between" spots that cause the crackle. No problem, just mute the strings before twiddling the knobs. It's normal for this amp.
 
#17
RustyAxe said:
I have new Shuttle 6.0 and it exhibits the same behavior. The pots have detents, they are not smooth like most. It's the "in-between" spots that cause the crackle. No problem, just mute the strings before twiddling the knobs. It's normal for this amp.
Click to expand...

Exactly correct. Much better description of the problem than mine.

Phew! I feel good knowing its normal and most peoples is doing the same thing.
 
#19
I have the "crackle when turning the volume knob" issue too. As well, I have a "periodically the volume drops to almost nothing for no particular reason, like a big huge pad switch" problem.

My understanding is that both problems are probably due to dirt or oxidation buildup, and quickly fixed by de-oxit, which I am picking up today. I am going to shoot a couple shots into the offending pot as well as the effects loop jacks since the volume drop problem is fixed when I hit the bypass switch on my Opto-stomp compressor, which is run in and out of the amp using the effects loop.

I do not believe that either of my problems are "normal" for this or any amp. For good measure, I am going to past this post into an email to Jeff Genzler and I will let you know his response.
 

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