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Seven string guitar project

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Seven string guitar project

Postby Sam Spoons » Wed May 13, 2020 12:28 pm

I've acquired an old, cheapo 12 string guitar. I plan to do a quick and dirty* modification to convert it into a 7 string. Plans are to shorten the headstock, put a new veneer on the face and replace the bridge with a blank one re-drilled for 7 strings.

However I'm concerned about replacing the bridge plate inside, I'm pretty sure that will be essential so any tips? I'm also thinking about the need to fill/plug the bridge pin holes in the top itself?

This is just so I can try the 7 string idea out and see if I get on with it and the donor guitar has negligible intrinsic value.

* Probably the best I'm capable of :blush:
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Re: Seven string guitar project

Postby zenguitar » Wed May 13, 2020 1:37 pm

As it's all about a quick & dirty proof of concept, I would go even simpler.

Forget about reworking the headstock. Just use the existing 12-string tuners, and just remove the string posts and gear from the unused tuners.

Don't bother removing the bridge. Carefully drill out the existing holes for the bridge pins and plug them. For cosmetics I would source a hardwood dowel with similar colour to rosewood. Plugs will retain the integrity of the soundboard and bridge plate as well. Then space out and drill for a 7 string.

How does that sound?

Andy :beamup:
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Re: Seven string guitar project

Postby Wonks » Wed May 13, 2020 2:03 pm

zenguitar wrote:Then space out and drill for a 7 string.

Probably best not to use power tools when spaced out, ;)
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Re: Seven string guitar project

Postby Sam Spoons » Wed May 13, 2020 2:24 pm

Yes Andy, That was plan A, the bridge needs refitting as it's started to lift hence the thought to use a new bridge but otherwise that makes sense.

Wonky, how did you know that I'm regularly spaced out in the evenings? But, I never use power tools (or indeed, any tools) after 'beer o'clock' :D
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Re: Seven string guitar project

Postby zenguitar » Wed May 13, 2020 2:37 pm

Not uncommon on a 12 string for the bridge to start to lift. Might be neater, cleaner, and easier to carefully clean where it is lifting and then get some glue in there and clamp. That should get you back on plan A

Andy :beamup:
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Re: Seven string guitar project

Postby Sam Spoons » Wed May 13, 2020 2:53 pm

You may well be right. Time on my hands but it may be better spent on other things.

thanks Andy.
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Re: Seven string guitar project

Postby shufflebeat » Wed May 13, 2020 7:13 pm

Sam Spoons wrote:You may well be right. Time on my hands but it may be better spent on other things.

thanks Andy.

Can't think of anything.
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Re: Seven string guitar project

Postby Sam Spoons » Thu May 14, 2020 12:00 am

:D Building a bass drum banjo?
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Re: Seven string guitar project

Postby shufflebeat » Thu May 14, 2020 9:21 pm

Mmm...

Any reliable projections as to how long lockdown will last?

And is B&Q open yet?
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Re: Seven string guitar project

Postby Folderol » Thu May 14, 2020 9:23 pm

shufflebeat wrote:Mmm...

Any reliable projections as to how long lockdown will last?

And is B&Q open yet?
1/ Dunno.
2/ Yes :)
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Re: Seven string guitar project

Postby Sam Spoons » Thu May 14, 2020 9:44 pm

shufflebeat wrote:Mmm...

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Re: Seven string guitar project

Postby shufflebeat » Fri May 15, 2020 12:09 am

Do you have a distribution deal yet?

By the way, I think I have a pickup for one of those:


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Re: Seven string guitar project

Postby zenguitar » Fri May 15, 2020 12:35 am

A number of years ago I had a friend who was under a consultant psychiatrist and had a dedicated social worker who had previously worked many years in electrical engineering.

My friend designed a guitar amp on paper that used 3 electricity substations, not for power but as components in the circuit. His social worker went through the design and realised that whilst impossible to build, it would have worked in principle.

Andy :beamup:
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Re: Seven string guitar project

Postby shufflebeat » Fri May 15, 2020 2:53 pm

See, I'm not losing the plot!

I'll be showing this thread to the Good Lady Wife later.
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Re: Seven string guitar project

Postby Sam Spoons » Thu May 28, 2020 11:29 am

Well the seven string has remained on hold for now but the bass is virtually complete and works surprisingly well.

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