My double top soundboard experience.

Construction and repair of Classical Guitar and related instruments

Re: My double top soundboard experience.

Post by CGuitarVA » Sun May 01, 2016 12:23 am

Nice to see a Vietnamese luthier on this forum. Keep up the good work Vu.

Posts: 675
Joined: Thu Feb 09, 2017 5:05 pm

Re: My double top soundboard experience.

Post by SteveL123 » Sat May 20, 2017 5:10 pm

Hi Vu,

I just came across your thread while looking for information on balsa double tops and came across your thread with pics of your melted vacuum cleaner vacuum pump. Find an old room air conditioner and take the compressor and use the input side of compressor as a vacuum pump. There should be enough oil left in the compressor for it to run for a few hours. It should produce a much higher vacuum than a vacuum cleaner can. You should be able to get 28 to 29 in Hg of vacuum.

How is your double top experiment coming along?
VuTran wrote:
Tue Mar 29, 2016 1:54 pm
Hi Alan,

I think if the is the delaminations then it's because of the thin joints between the top and the Nomex. On this type of construction, the joints are 1.4mm and compared to some light bracings with 2.5mm wide. I don't think the delaminations will happen unless there is not enough glue on the skin. I added more glue than It need to be after weighting the Titebond when it dried.

My vacuum cleaner went to the heaven after two hours of hard working.
It's still working but It's better for my ears to let him go.


Amateur luthier
Posts: 44
Joined: Tue Jan 21, 2014 10:18 am
Location: Dalat, Vietnam

Re: My double top soundboard experience.

Post by VuTran » Mon Jun 12, 2017 4:53 am

My double top guitar is finished long time ago. I still keep it at home.
I've made some double top guitars after that. Some players like it, some doesn't.
Now, I'm back to traditional build. If I do it again, I will use nomex.

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