lowlandtrees Posted January 12, 2019 Share Posted January 12, 2019 Hi...OK, I’m not the brightest with tech and I am posting this here coz I am guessing that most people using an EA Doubler are using a DB or EUB. Since I started adjusting the top ‘screwdriver ‘ settings they do not seem to stay in place. Maybe they have worn threads or I am not using them correctly. Have read the manual but not much instruction there. Anyone had any issues like this? Can any electronic engineer do a service on these or would it have to go back to EA? Quote Link to comment Share on other sites More sharing options...
TheRev Posted January 12, 2019 Share Posted January 12, 2019 I've never had any such issues with mine. They're supposed to be 'set and forget' controls and I can't think if what would cause them to move by themselves. If they need replacing, I'm sure any amp repair shop could do the work - the pots are just soldered onto the front PCB. Quote Link to comment Share on other sites More sharing options...
lowlandtrees Posted January 13, 2019 Author Share Posted January 13, 2019 20 hours ago, TheRev said: I've never had any such issues with mine. They're supposed to be 'set and forget' controls and I can't think if what would cause them to move by themselves. If they need replacing, I'm sure any amp repair shop could do the work - the pots are just soldered onto the front PCB. That’s what I thought but definitely something going on. Never had any problems with the amp and love the sound...and expensive to replace. Not sure who to go to in Scotland. Quote Link to comment Share on other sites More sharing options...
TheRev Posted January 13, 2019 Share Posted January 13, 2019 Have you noticed that the trim pots have definitely physically moved or is it that you're hearing a change in the sound over time? Quote Link to comment Share on other sites More sharing options...
lowlandtrees Posted January 14, 2019 Author Share Posted January 14, 2019 On 13/01/2019 at 15:27, TheRev said: Have you noticed that the trim pots have definitely physically moved or is it that you're hearing a change in the sound over time? Absolutely. Very clearly...from one practice to the next, a week apart. We Quote Link to comment Share on other sites More sharing options...
Marc S Posted January 15, 2019 Share Posted January 15, 2019 I "tweaked" the trim pots on mine, just on the one channel, not long after I got the amp (The channel I was intending for upright) But I've not noticed any movement since then, and that was some 2 years plus ago.... I can't imagine how they could move on their own. Check them again now, are they physically very loose? If so, then vibration from sitting atop the speaker cab could cause movement. But they shouldn't be that loose! Are they still making a difference to the sound, when you adjust them? If they're that loose - I'd be tempted to whip the casing off and at least have a look. Definitely leave the repair to someone qualified - but taking a look might at least let you know what it is that's going on.... If you don't know of any amp repair techs in your area - ask whether a local guitar shop could either do it, or who they recommend. Also, a post asking for amp techs on here may help Most of all - good luck, and I hope you get it sorted. They're great amps Quote Link to comment Share on other sites More sharing options...
lowlandtrees Posted January 17, 2019 Author Share Posted January 17, 2019 Thanks. Gonna at least have them looked at. Seems like no one else has had any problems. I hate the idea of it crashing on a gig. I always take a spare (Roland 100 bass cube) but still... Quote Link to comment Share on other sites More sharing options...
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