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#1
04-02-2018, 07:09 AM
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Hum on my pickup, gone when i touch jack, help?
Hi.
I have a question for the AP5pro mic on my Maton EBG 808 TE. There is a little hum especially when i turn the mic on. And when i touch the metal end of the jack from the cable that comes in the guitar in the back, the hum disappears. When i release, its back on. Its sounds like a grounding issue, but i don't know. Can you tell me what seems to be the problem, and is it fixable. 
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#2
04-02-2018, 07:11 AM
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This a classic symptom of an improperly grounded system.
Your body is creating a ground path. You need to chase down the ground path failure in your system.
__________________
Fazool "The wand chooses the wizard, Mr. Potter" Taylor GC7, GA3-12, SB2-C, SB2-Cp...... Ibanez AVC-11MHx , AC-240
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#3
04-02-2018, 07:12 AM
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Yes this is fixable, but you need to check every electrical device/cable/connection in your path and make sure the ground path is intact.
__________________
Fazool "The wand chooses the wizard, Mr. Potter" Taylor GC7, GA3-12, SB2-C, SB2-Cp...... Ibanez AVC-11MHx , AC-240
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#4
04-02-2018, 08:37 AM
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is there a way to ground it my self, if i dont locate the problem?
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#5
04-02-2018, 08:46 AM
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It really depends where the short is at.
You can run a separate grounding wire from the jack to a connected ground but you have to first find a spot to connect it to that is connected to ground. If there is a missing connection inside your guitar, that's easy to fix. If you have a poor cable connection that's easy to replace. If your issue is past that then you can't really run a wire from the jack to your amp. The other thing is that some times homes are ground-wired wrong and amps can't connect to ground and hum, so some amps have a selector switch so you can switch the ground path. Best way to approach this is to "divide and conquer": first take your entire setup to another building to determine if it's the ground wiring in your building. If not, then try different outlets in your building to narrow down. If not, then try your setup with someone else's amp to determine if its the amp or the guitar/cable. etc etc.
__________________
Fazool "The wand chooses the wizard, Mr. Potter" Taylor GC7, GA3-12, SB2-C, SB2-Cp...... Ibanez AVC-11MHx , AC-240
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#6
04-02-2018, 11:47 AM
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Its Maton (Tommy Emmanuel) model acoustic guitar with AP5PRO Mic pickup. Its pretty high end equipment. The problem occurs so far in 2-3 deferent gigs, when plugged in direct in PA, because its active pickup. Thats how i play the guitar.
I'll continue to look for a good tech, because i don't mees withj electronics justlike that. Thanks for you answer.
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