Andyalfa Posted December 10, 2008 Share Posted December 10, 2008 Hi there. I need a little advice. I currently have an Ashdown ABM Evo II 500 which is only 2 years old. Generally, I've been very pleased with the build and sound quality, but unfortunately, despite sounding great most of the time, it’s recently developed a problem. When I turn the input gain or the output volume knobs, it makes a very loud grinding, crackling noise, and depending where I stop turning, I either have buzzing, a dead spot, or normal sound. I’m no sparky, but I don’t mind getting the amp out of the casing and blowing the dust off. However, do you think it’s a little more than dirt and should I get it looked at professionally? Do amps require regular servicing in the same way I send my bass for a set up every 12 months? Quote Link to comment Share on other sites More sharing options...
Waldo Posted December 10, 2008 Share Posted December 10, 2008 (edited) Sounds like you might just need to clean the pots with some contact cleaner. You shouldn't have to service your amp yearly like you might do with a bass. Well, it is an Ashdown you have afterall Edited December 10, 2008 by Waldo Quote Link to comment Share on other sites More sharing options...
Andyalfa Posted December 10, 2008 Author Share Posted December 10, 2008 [quote name='Waldo' post='350656' date='Dec 10 2008, 01:24 PM']Sounds like you might just need to clean the pots with some contact cleaner. You shouldn't have to service your amp yearly like you might do with a bass. Well, it is an Ashdown you have afterall [/quote] Thanks for the swift reply. When you say contact cleaner, do mean something like a quick squirt of WD40 or the solvent I used to use to clean the heads of my old tape deck? Quote Link to comment Share on other sites More sharing options...
MB1 Posted December 10, 2008 Share Posted December 10, 2008 MB1. Best Bet!....Contact Ashdown on 01245441155. Quote Link to comment Share on other sites More sharing options...
Waldo Posted December 10, 2008 Share Posted December 10, 2008 (edited) WD-40 is a definate no, the residue from it will attract dust and is insulating so could end up making the problem worse later. You can buy cans of Servisol from Maplins which is made for this purpose, not sure about your tape head cleaner, best to be safe than sorry. I'm sure Ashdown could tell you the best thing to use, if they think that will solve the problem. Edited December 10, 2008 by Waldo Quote Link to comment Share on other sites More sharing options...
Andyalfa Posted December 10, 2008 Author Share Posted December 10, 2008 [quote name='Waldo' post='350689' date='Dec 10 2008, 01:42 PM']WD-40 is a definate no, the residue from it will attract dust and is insulating so could end up making the problem worse later. You can buy cans of Servisol from Maplins which is made for this purpose, not sure about your tape head cleaner, best to be safe than sorry. I'm sure Ashdown could tell you the best thing to use, if they think that will solve the problem.[/quote] Good idea, I'll drop them an email. They've always responded quickly in the past to my occasional query. Quote Link to comment Share on other sites More sharing options...
lateralus462 Posted December 10, 2008 Share Posted December 10, 2008 I had a crackly pot on my ABM (the "gain" iirc) - Servisol worked fine. Quote Link to comment Share on other sites More sharing options...
lowhand_mike Posted December 11, 2008 Share Posted December 11, 2008 yeah sounds like a dirty pot. usually you get that more on a bass pot but its possible on the amp. give ashdown a shout, email or phone "crackly pot, talk to me..." or servisol and some gentle twisting of the pot to work it in. hope its sorted Quote Link to comment Share on other sites More sharing options...
MB1 Posted December 11, 2008 Share Posted December 11, 2008 [quote name='Andyalfa' post='350702' date='Dec 10 2008, 01:50 PM']Good idea, I'll drop them an email. They've always responded quickly in the past to my occasional query.[/quote] MB1. You could even phone them! Quote Link to comment Share on other sites More sharing options...
Andyalfa Posted December 11, 2008 Author Share Posted December 11, 2008 Just had the following reply from Russ Swindle at Ashdown [i]"Hi Andy, It sounds like your input and ouput pots need cleaning out - this is something you can do yourself if you're happy to open up the amp. All you need is some contact treatment oil, you can get this at Maplin (order code JP17T). Spray this into the pots and work them backwards and forwards a few times and you should find that all the scratchiness and noise has gone. Regards Russ."[/i] Pretty much echoes the advice from you bass chatters. Thanks for that. Nice little job for Saturday morning coming up. Saves me putting the lights up on a wet tree, anyway. 1 Quote Link to comment Share on other sites More sharing options...
Waldo Posted December 11, 2008 Share Posted December 11, 2008 [quote name='Andyalfa' post='351758' date='Dec 11 2008, 01:49 PM']Just had the following reply from Russ Swindle at Ashdown [i]"Hi Andy, It sounds like your input and ouput pots need cleaning out - this is something you can do yourself if you're happy to open up the amp. All you need is some contact treatment oil, you can get this at Maplin (order code JP17T). Spray this into the pots and work them backwards and forwards a few times and you should find that all the scratchiness and noise has gone. Regards Russ."[/i] Pretty much echoes the advice from you bass chatters. Thanks for that. Nice little job for Saturday morning coming up. [b]Saves me putting the lights up on a wet tree, anyway[/b].[/quote] Hah, well good luck with it! Let us know how you get on. Quote Link to comment Share on other sites More sharing options...
Andyalfa Posted December 17, 2008 Author Share Posted December 17, 2008 [quote name='Waldo' post='351959' date='Dec 11 2008, 05:21 PM']Hah, well good luck with it! Let us know how you get on.[/quote] The problem is fixed! Servisol did the trick. Thanks for the tip folks. The only noise coming out of the amp now are the rasping tones of my p-bass! 1 Quote Link to comment Share on other sites More sharing options...
PeteJ Posted January 26, 2021 Share Posted January 26, 2021 This thread was very useful - just resolved a similar issue with my output pot. Quote Link to comment Share on other sites More sharing options...
lownote Posted January 26, 2021 Share Posted January 26, 2021 Ashdown are the BEST Quote Link to comment Share on other sites More sharing options...
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