Search found 286 matches

by Dave M
Wed Apr 17, 2019 1:45 am
Forum: Instrument Builders Forum
Topic: Just Finished Falcate braced Osage Orange\WRC classical
Replies: 4
Views: 180

Re: Just Finished Falcate braced Osage Orange\WRC classical

Thanks for the detailed reply John. I'm pretty sure, thinking through your points, that my issue has been too thick a top (and also perhaps too thick a nitro finish)

I was thinking of retopping my last one but I will try thinning the top before actually removing and see if I get anywhere.
by Dave M
Tue Apr 16, 2019 7:03 am
Forum: Instrument Builders Forum
Topic: Just Finished Falcate braced Osage Orange\WRC classical
Replies: 4
Views: 180

Re: Just Finished Falcate braced Osage Orange\WRC classical

John that looks great. Photo reproduction doesn't give a very real view but the Osage looks fine. Lovely grain pattern. And As you say, over time any brashness will calm down. The overall aesthetic works well. I like the heel shape. It is a bit of a regret that since I decided to always make cutaway...
by Dave M
Tue Apr 09, 2019 2:26 am
Forum: The Gallery
Topic: Fresh off the bench Blackwood/spruce classical (PIC HEAVY)
Replies: 6
Views: 278

Re: Fresh off the bench Blackwood/spruce classical (PIC HEAVY)

Nice crisp work Steve. The blackwood is indeed lovely. I particularly like your heel shape. That is the style that I used to aim for but unfortunately since I now always do cutaways I'm stuck with a rather formless round shape. But I love the access to the upper frets. What bracing are you using? An...
by Dave M
Tue Apr 09, 2019 2:18 am
Forum: Instrument Builders Forum
Topic: Acoustical effect of back woods
Replies: 21
Views: 969

Re: Acoustical effect of back woods

Trevor. Quite.

Dave
by Dave M
Wed Mar 27, 2019 7:15 am
Forum: Instrument Builders Forum
Topic: Side bend question...
Replies: 18
Views: 863

Re: Side bend question...

As Steve suggests I go down to 1.8 mm for the cutaway side. If this is really your first build it is perhaps worth noting that a cutaway is significantly harder to do than a straight build. Everything from bending the sides, shaping the linings, fitting the bindings, shaping the head block etc are a...
by Dave M
Sun Mar 24, 2019 10:58 pm
Forum: Jigs & Fixtures
Topic: Tapering the Neck
Replies: 0
Views: 338

Tapering the Neck

In the latest GAL mag Mark French shows some photos of Charles Fox's workshop and there is a very nifty way of supporting the neck when tapering it on the bandsaw. The problem is that you can only really mark out where the fretboard will sit on the top of the neck. But the heel and headstock means t...
by Dave M
Sat Mar 23, 2019 3:52 am
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Wood for Falcate Braces in UK
Replies: 12
Views: 543

Re: Wood for Falcate Braces in UK

As with John I use spruce and could not bend thick strips so ended up with more, thinner laminations. Even then I wasn't particularly pleased and some snapped during bending but eventually got acceptable results. Hot pipe bend then the primaries clamped to an inside caul for glueing and for the seco...
by Dave M
Sun Mar 17, 2019 10:04 am
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: 3 piece pernambuco back
Replies: 10
Views: 2199

Re: 3 piece pernambuco back

John I like that you are doing a cutaway classical. I have decided that by default I will always do a cutaway since as a player it is so much nicer to use. As an aside, as you probably know Pernambuco is/was the favoured wood for violin bows. Usually looking darker than your sample. Stlll sticking w...
by Dave M
Sat Mar 16, 2019 2:51 am
Forum: Jigs & Fixtures
Topic: Tail Strip Glueing
Replies: 1
Views: 254

Tail Strip Glueing

I saw this idea somewhere but since I can't remember where I can't attribute it.

Since I was doing this job today I thought I would try it and it seems to work really well.

A means of holding the body and resist the push of a couple of go bars.
by Dave M
Fri Mar 08, 2019 4:20 am
Forum: Instrument Builders Forum
Topic: Weird finishing problem
Replies: 10
Views: 850

Re: Weird finishing problem

Wouldn't a couple of coats of shellac seal whatever the problem is?
by Dave M
Fri Mar 01, 2019 4:57 am
Forum: Instrument Builders Forum
Topic: What am I doing here?
Replies: 30
Views: 2031

Re: What am I doing here?

This is a form of mandolin of course. There is an interesting chapter on it's development in Graham McDonald's book 'The Mandolin a History'

And those pipes are certainly more tuneful than the ones we normally see!
by Dave M
Thu Feb 21, 2019 3:19 am
Forum: Instrument Builders Forum
Topic: Old build, dead guitar
Replies: 7
Views: 935

Re: Old build, dead guitar

As Jeff said. The bridge rotation test in the book is very useful. It has pinpointed a classical that was overbuilt for me recently.


Dave
by Dave M
Wed Feb 06, 2019 10:32 am
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Falcate braces - radiusing?
Replies: 7
Views: 643

Re: Falcate braces - radiusing?

I haven’t done this but I guess you could check the situation by laying the falcate braces in the radiused/dished workboard and checking for gaps with feeler gauges.

As you have suggested any small gaps will be filled with the epoxy.

Cheers Dave
by Dave M
Wed Feb 06, 2019 4:17 am
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Falcate braces - radiusing?
Replies: 7
Views: 643

Re: Falcate braces - radiusing?

I take it you mean shaping the underside to fit the spherically arched top - as we do with the back braces. At some point, and it may have been in this forum rather than in the book, Trevor has stated that the braces will happily sit down into the curve even though they are flat. I guess this is due...
by Dave M
Thu Jan 24, 2019 3:41 am
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Steel String Chladni Patterns
Replies: 3
Views: 523

Re: Steel String Chladni Patterns

Well I can answer my own question having finally got round to doing a bridge rotation test. I have a very stiff top!

It is falcate braced and I thought it a pretty good, loud guitar with plenty of sustain, but maybe I haven't put it alongside a really responsive guitar.
by Dave M
Sat Jan 12, 2019 3:40 am
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Steel String Chladni Patterns
Replies: 3
Views: 523

Steel String Chladni Patterns

Most of my generating of Chladnis has been on classical guitars. I was testing a recently completed steel string and was having a bit of difficulty exciting the top. It struck me that perhaps the much stiffer top structure of the SS might need a lot more acoustic energy to get it going. Would people...
by Dave M
Tue Jan 01, 2019 3:21 am
Forum: Instrument Builders Forum
Topic: Some mandolin thoughts
Replies: 3
Views: 946

Re: Some mandolin thoughts

Peter that's very interesting. Trying to understand what is going on. Presumably the actual frequency of the back shouldn't matter because we are not hearing it. If the node line of the main top has moved outward presumably this would suggest an effect like Trevor's extra side mass...? Perhaps the e...
by Dave M
Sun Dec 23, 2018 10:16 pm
Forum: Instrument Builders Forum
Topic: Timber identification
Replies: 14
Views: 2036

Re: Timber identification

If it's not an Aus timber it looks an awful lot like Sapele. Dave
by Dave M
Thu Dec 20, 2018 8:58 am
Forum: Instrument Builders Forum
Topic: American Lutherie 118
Replies: 2
Views: 919

Re: American Lutherie 118

Nigel I did dig out that article thinking I might be able to scan and email it to you but it is far too big. Hopefully Martin or someone else local will be able to give you a copy. John Greven certainly has some interesting ideas on improving the efficiency of the building process. I was particularl...
by Dave M
Sun Dec 02, 2018 3:56 am
Forum: The Gallery
Topic: Figured Maple
Replies: 8
Views: 1463

Re: Figured Maple

Thanks Martin. I will be keeping the classical to do my terrible playing on since I have got rid of most of my others.
The SS I'll have to see if anyone is interested.
by Dave M
Sat Dec 01, 2018 3:01 am
Forum: Instrument Builders Forum
Topic: Neck angle
Replies: 11
Views: 1910

Re: Neck angle

And one might add that getting this geometry right is a pretty subtle process and remains one of the more difficult tasks for we beginners.
by Dave M
Sat Dec 01, 2018 2:55 am
Forum: The Gallery
Topic: Figured Maple
Replies: 8
Views: 1463

Re: Figured Maple

Thanks Fisherman. I didn't show them but my mitred purflings at the tail strip are gradually improving! And that is a good question. I keep thinking I should be doing some thinning but on this build I felt it was really such a light weight top that I didn't. It is Engelmann, taken to around 2.1 to 2...
by Dave M
Fri Nov 30, 2018 3:14 am
Forum: The Gallery
Topic: Figured Maple
Replies: 8
Views: 1463

Figured Maple

Drawing 1 small.jpg I haven't been too productive this year but have managed to finish these two which I am very pleased with. Fronts small.jpg One is a standard Trevor Falcate steel string. A design I keep going back to since it works so well. and the other is my Torres influenced classical. Yes I...
by Dave M
Tue Nov 27, 2018 10:21 am
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Starting out on J45
Replies: 29
Views: 5272

Re: Starting out on J45

I think there is a thing going on here which we toilers in our sheds all tend to suffer from. You really don’t have to own all the machines stroke tools that are needed. There is almost certainly another woodworker near you who actually has a morticing macihine and would happily let you use it for t...
by Dave M
Wed Nov 21, 2018 3:58 am
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Disharmony in SS Guitars
Replies: 3
Views: 821

Re: Disharmony in SS Guitars

This is it Trent:

https://www.youtube.com/watch?v=PO__iHHQyC0

It has a rather odd intro and outro but the playing is good