Replies to This Discussion

Permalink Reply by Paul Craig on September 16, 2015 at 7:40pm

I'm betting that pickup is wax potted and sealed. The outer shell is usually grounded to the base, could you have damaged the ground connection when you ground off the ears? Could also be a problem with the cord. You could try placing a piece of foil between the pup and body to see if it's a shielding problem.

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Permalink Reply by Mark Jeghers on September 17, 2015 at 7:35am

The ground wire looks pretty good, so I think it is ok.  There are new mounting screws underneath the coil/magnet that I added to attach to the neck.  They are beveled flat head wood screws, so they lay pretty low against the metal, but they are not totally flush, they probably stick up about a half millimeter.  So the magnet used to grip grips (magnetically) totally against the back metal, but now it probably grips (magnetically) mainly to the screws.

I'd also like to know if the unmodified product is also microphonic to this same degree.  Does anyone know?

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Permalink Reply by Mark Jeghers on September 17, 2015 at 7:36am

I'd also like to know if the unmodified product is also microphonic to this same degree.  Does anyone know?

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Permalink Reply by Paul Craig on September 17, 2015 at 8:13am

So the shell is still grounded? do you have or can you take any pics?

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Permalink Reply by Mark Jeghers on September 17, 2015 at 8:14am

Yes it is still grounded.  I will get some pics tonite.

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Permalink Reply by Paul Craig on September 17, 2015 at 8:55am

I'm also a member on a guitar forum and there was a thread about acoustic guitars with magnetic pickups mounted on the soundboard and in the soundhole causing weird problems due to the vibrating from the soundboard. But the old Dearmond had a pickup that mounted to the neck end and sat above the soundboard didn't have any problems. Don't know if this could be the problem your having or not.

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Permalink Reply by Paul Craig on September 17, 2015 at 9:07am

Okay, I watched the video. Since the "dog ear" isn't flush with the bottom of the pickup, I'm guessing that if it is torqued down to the top, it could flex the pup chasing and cause a problem to. You could try loosening the mounting screws to see if it makes a difference, but it's just a guessing game for me at this point without seeing it.

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Permalink Reply by Jim_N on September 17, 2015 at 10:58am

I don’t know the answer to this problem, so… thinking in a different direction, mounting-wise…

Maybe an oblong-shaped hole in which to put the pickup, and mount it as it was intended to be used on top of a factory-made acoustic? Or just mount it in/under the box top?

FWIW, I have used this style pup (the inexpensive eBAY version, not the O-Fish-Shul “Gold Foils"), in/under a cbg box top, and in standard acoustic guitars a number of times without any probs. (As in the CBG I pic’d here, above: usually I remove the pup's stock cover before installation.)

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Permalink Reply by Mark Jeghers on September 17, 2015 at 11:53am

Do you have *no* microphonic behavior at all?  Or very little?

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Permalink Reply by Jim_N on September 18, 2015 at 10:40am

Mark > These pups absolutely have a bit of a microphonic effect. Personally, I just don’t see it as a problem since I don’t turn up an amp loud enough for ‘em to cause the squealing/feedback one can expect with this kind of cheap, probably loosely-wound and/or unwaxed pickups. (On the other hand, I kinda’ like that they amp the knocking somewhat when drumming on the guitar.)
Hope I wasn’t misleading. I think I was more replying to Paul Craig’s post regarding experimenting with “fitment.”

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Permalink Reply by Mark Jeghers on September 17, 2015 at 3:39pm

Here is the pickup on the neck, and how it is attached.  The ground wire looks like it is connected ok.

Attachments:

• IMG_20150917_191902.jpg, 1 MB
• IMG_20150917_192104.jpg, 994 KB
• IMG_20150917_192144.jpg, 1.4 MB

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Permalink Reply by Mark Jeghers on September 17, 2015 at 3:41pm

And here are the wood screws attaching the pup to the neck.  Notice they protrude up a little, so the magnet is no longer fully hugging the back metal.

Attachments:

• IMG_20150917_192238.jpg, 1.3 MB

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