Hoffman Amplifiers Tube Amplifier Forum

Other Stuff => Guitars => Topic started by: 1blueheron on January 25, 2021, 08:30:49 am

Title: Microphonic pickup issue
Post by: 1blueheron on January 25, 2021, 08:30:49 am
My son and I have been building a custom body guitar.  After installing the electronics, it is extremely sensitive to any vibration, even without strings installed.   Touching or tapping the body of the guitar is transmitted directly to the amp.   Any ideas on how to approach this?   The pickup is a humbucker that came from a donor Yamaha guitar which seemed to be functioning fine before we broke it down into parts.
Title: Re: Microphonic pickup issue
Post by: jjasilli on January 25, 2021, 01:37:11 pm
Maybe this will help:  http://www.strangeguitarworks.com/wax-potting-microphonic-pickups/


(FWIW: I once tried wax potting cheapo Hondo PU's; but it didn't work.)
Title: Re: Microphonic pickup issue
Post by: Latole on January 29, 2021, 02:49:50 am
If pickup was functioning fine on the Yamaha guitar, I can't understand why it need wax potting now.

Chance is more you have a wiring issue; a ground is missing.
 
Post picture of wiring / electronics

A microphonic pickups make noise / feedback a high volume, not like you say
Title: Re: Microphonic pickup issue
Post by: pdf64 on January 30, 2021, 04:04:48 am
Have strings been fitted to the guitar yet?

If not, do so and re-asses; it’s probably fine.
Title: Re: Microphonic pickup issue
Post by: Latole on January 30, 2021, 06:13:37 am
Chance is more you have a wiring issue; a ground is missing.

Or positive + and ground are reverse somewhere.
Title: Re: Microphonic pickup issue
Post by: Colas LeGrippa on February 08, 2021, 08:24:06 am
You might have connected the gnd from the pots to the "+" of the input jack ( or somewhere else )
Title: Re: Microphonic pickup issue
Post by: Latole on February 10, 2021, 03:23:04 am
One post and no return since 16 days !
Title: Re: Microphonic pickup issue
Post by: Colas LeGrippa on February 10, 2021, 08:44:21 am
Yep. Maybe he caught the virus or got shot in a bank or died in a plane crash...



Title: Re: Microphonic pickup issue
Post by: Colas LeGrippa on February 10, 2021, 08:47:07 am
Got it :  some aliens took him away in their flying saucer and the internet is out aboard
Title: Re: Microphonic pickup issue
Post by: shooter on February 10, 2021, 10:25:08 am
I'm going with committed suicide waiting on hold to talk with another human  :dontknow:
Title: Re: Microphonic pickup issue
Post by: Colas LeGrippa on February 10, 2021, 11:49:59 am
 :laugh: