Search found 111 matches

by Woodsy23
Thu Oct 29, 2015 1:04 pm
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Cross-grain tap test advice?
Replies: 29
Views: 13220

Re: Cross-grain tap test advice?

James, I was going to look at the books last night but forgot. My recollection is that the location to hold the board (the node) is a point at about 23% of the length from the end, for the longitudinal stiffness, and 23% of the width from the side for the cross stiffness. These are the points in the...
by Woodsy23
Wed Oct 28, 2015 1:25 pm
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Cross-grain tap test advice?
Replies: 29
Views: 13220

Re: Cross-grain tap test advice?

James,

I haven't got the books with me at the moment so I can't check but my recollection is that the point where you hold the board to generate the cross grain vibration is further from the edge of the board than indicated by your marks. I may be wrong but it's worth checking the books.
by Woodsy23
Thu Aug 13, 2015 1:03 pm
Forum: Instrument Builders Forum
Topic: Can you spot what is bugging me?
Replies: 23
Views: 9966

Re: Can you spot what is bugging me?

I think the markers look fine. You could promote them as "oversize fret markers for improved tone and sustain"
by Woodsy23
Tue Jul 14, 2015 12:38 pm
Forum: The Gallery
Topic: Flat Top Mandolin
Replies: 20
Views: 10207

Re: Flat Top Mandolin

Fantastic looking instrument. It's inspired me to have a go at a mandolin.
by Woodsy23
Tue Jul 14, 2015 12:23 pm
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: SS 14 fret falcate
Replies: 9
Views: 4907

Re: SS 14 fret falcate

Trevor, The question that this thread and the my own falcate SS build raise with me is: Is it possible to have several similar guitars all with the same good "numbers" for resonant frequencies, monopole mobility, bridge rotation etc but with noticeably different performance acoustically? For example...
by Woodsy23
Wed Jul 08, 2015 12:25 pm
Forum: Instrument Builders Forum
Topic: Just closed falcate classical - with tap spectrum
Replies: 53
Views: 19411

Re: Just closed falcate classical - with tap spectrum

That's a really great looking guitar. I didn't know you could get that level of gloss with just micromesh.

I know what you mean about a great sounding guitar making you want to play more. I feel the same. If only I had some ability in that area.
by Woodsy23
Sun Jul 05, 2015 8:52 pm
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Gallery of "Book" builds
Replies: 27
Views: 23257

Re: Gallery of "Book" builds

Here is the 12 string that was my first acoustic build. I started with plans of a Martin D12/28 from Ultimate Guitar Online but, after getting the books, I adapted the book plan of the J45 to the Martin body shape. The main change I made was to the top bracing. I made the X braces basically rectangu...
by Woodsy23
Sun Jul 05, 2015 8:12 pm
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Tap Test after Closing Box
Replies: 21
Views: 9561

Re: Tap Test after Closing Box

It has been 10 months since i finished this guitar. I built a top deflection measuring rig (similar to Trevor's and Jeff's in this thread http://www.anzlf.com/viewtopic.php?f=33&t=5464&hilit=deflection ) to test my second guitar, a falcate steel string to the design in the book, so I tested the 12 s...
by Woodsy23
Sat Jul 04, 2015 5:03 pm
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Gallery of "Book" builds
Replies: 27
Views: 23257

Re: Gallery of "Book" builds

Well, after the posts above displaying some stunning builds by professional and semi-professional guitar builders, here's one from a hobby builder. I started building electrics in about 2007 and only recently started building acoustics after buying the books. This post is about my second build, basi...
by Woodsy23
Fri Jul 03, 2015 3:54 pm
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: First Gore Steel String - Resonances
Replies: 13
Views: 6354

Re: First Gore Steel String - Resonances

Trevor, Thanks for the tip about plugging the sound hole. After rummaging through the recycling bin I found a container of the right size, plugged the hole and measured the top resonance. It came out at 153.5 Hz. That gives a monopole mobility of between 19x10^-3 s/kg and 21.5x10^-3 s/kg. Enough abo...
by Woodsy23
Fri Jul 03, 2015 1:41 pm
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: First Gore Steel String - Resonances
Replies: 13
Views: 6354

Re: First Gore Steel String - Resonances

What did I find most beneficial about the techniques in the books? That's an easy one to answer. EVERYTHING! As any beginner, I found the books to be totally comprehensive. Of course, the unique aspect of the books, as everyone who has read them knows, is the information on determining the target pl...
by Woodsy23
Thu Jul 02, 2015 10:47 pm
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: First Gore Steel String - Resonances
Replies: 13
Views: 6354

Re: First Gore Steel String - Resonances

I have put new strings on and I'm very happy with the sound. I can't hear any problems with any notes. While I was changing strings, I did a quick measure of the bridge rotation during string unloading and then did some top deflection measurements. I had previously posted about the deflections I cou...
by Woodsy23
Mon Jun 29, 2015 9:30 pm
Forum: Jigs & Fixtures
Topic: "House" Shaped Brace Gluing Caul
Replies: 3
Views: 8266

"House" Shaped Brace Gluing Caul

I made these cauls for gluing "house" or "gable" shaped bracing in a go-bar deck. They worked really well. If you shape the bevels of the braces with a 22.5 degree bevel router bit (or any other angle), they are easy to make at the same time from a piece of cheap 42 x 19 pine. Just put a 22.5 degree...
by Woodsy23
Tue Jun 23, 2015 11:57 pm
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: First Gore Steel String - Resonances
Replies: 13
Views: 6354

Re: First Gore Steel String - Resonances

How time flies. It's been three months since I closed the box and did the initial tap testing. Well, the guitar is now complete except for trimming body resonances. There's no rattles or buzzes and the compensated saddle seems to do the job. I have just done a tap test with the guitar strung and set...
by Woodsy23
Thu Jun 18, 2015 12:22 pm
Forum: Instrument Builders Forum
Topic: Just closed falcate classical - with tap spectrum
Replies: 53
Views: 19411

Re: Just closed falcate classical - with tap spectrum

My falcate SS (without bridge) has now been in the humidity control room (small bathroom with dehumidifier) for nearly three days at 45%. The cross curvature in the outer areas (1/3 of width) of the top appear to have returned to a radius of about 10m. However, a dip remains in the middle 1/3, betwe...
by Woodsy23
Tue Jun 16, 2015 12:07 pm
Forum: Instrument Builders Forum
Topic: Just closed falcate classical - with tap spectrum
Replies: 53
Views: 19411

Re: Just closed falcate classical - with tap spectrum

I am building my first falcate steel string guitar. After gluing the braces and boxing up the guitar, it has been not been in a humidity controlled environment and the humidity has generally been a lot higher than 45% - more like 60% to 90% - for many weeks. I have observed that there is a dip in th...
by Woodsy23
Wed May 20, 2015 5:25 pm
Forum: Instrument Builders Forum
Topic: Humidity in Perth - Garage building
Replies: 5
Views: 2808

Re: Humidity in Perth - Garage building

I am in Sydney and have limited work space. I have a Delonghi CF08m dehumidifier which I put in a medium sized bathroom to control the humidity to 45% and that works well. When I put it in a double garage it barely reduced the humidity at all. You will need a bigger dehumidifier or a smaller room. Y...
by Woodsy23
Mon May 18, 2015 12:05 pm
Forum: Instrument Builders Forum
Topic: Archtop question
Replies: 7
Views: 2352

Re: Archtop question

For humidity control, I have a small dehumidifier and I'm thinking of adapting one of these "walk-in" green houses from Aldi as a "dry room". http://www.discountstoresau.com/aldi-catalogue/aldi-catalogue-may-2014-general-products-review-8.html They should seal well enough and can be dismantled and s...
by Woodsy23
Wed May 13, 2015 12:33 pm
Forum: Instrument Builders Forum
Topic: New Luthier Tips du Jour Video - Shellac & sawdust pore fill
Replies: 9
Views: 3547

Re: New Luthier Tips du Jour Video - Shellac & sawdust pore

I tried this method of pore filling for the first time last night on my second acoustic guitar - EIR back and sides & Mahogany neck. It worked very well for the neck as I copied everything Robbie did in his video. However, I found a way to stuff things up a little doing the back and sides. I used Ub...
by Woodsy23
Mon May 11, 2015 12:21 pm
Forum: Instrument Builders Forum
Topic: Wipe-on finish for acoustic guitar
Replies: 58
Views: 30428

Re: Wipe-on finish for acoustic guitar

Allan,
Thanks for giving it a try. I hope I didn't send you on a wild goose chase by mentioning this product. It seemed good from the marketing blurb.
by Woodsy23
Thu Apr 30, 2015 12:12 pm
Forum: Instrument Builders Forum
Topic: New Luthier Tips du Jour Video - Shellac & sawdust pore fill
Replies: 9
Views: 3547

Re: New Luthier Tips du Jour Video - Shellac & sawdust pore

Would anyone care to speculate how this pore filling method might work with East Indian Rosewood. My concern is that the shellac might pull the colour out of the rosewood and stain the maple binding (and top if I am not careful). I guess I could sand any staining off the maple binding after the pore...
by Woodsy23
Wed Apr 29, 2015 12:30 pm
Forum: Instrument Builders Forum
Topic: F Hole Binding Iron?
Replies: 12
Views: 4902

Re: F Hole Binding Iron?

You could use a cartridge heater. There are available really cheaply on ebay, if you are prepared to wait. For example: http://www.ebay.com.au/itm/10x100mm-220V-250W-Single-head-Cartridge-Mold-Heater-Heating-element-Two-wire-/181579548917?pt=LH_DefaultDomain_15&hash=item2a46fc08f5 You will need some...
by Woodsy23
Tue Apr 28, 2015 12:11 pm
Forum: Instrument Builders Forum
Topic: Wipe-on finish for acoustic guitar
Replies: 58
Views: 30428

Re: Wipe-on finish for acoustic guitar

I just noticed this "new" product on the Ubeaut web site - called Aussie Oil. Supposedly, it is applied by hand and gives a high gloss finish. Has anyone tried it?
http://www.ubeaut.com.au/aussie.htm
by Woodsy23
Wed Apr 22, 2015 12:33 pm
Forum: Instrument Builders Forum
Topic: Gore cutaway OM
Replies: 19
Views: 6950

Re: Gore cutaway OM

I can really sympathise with you regarding the side bending problems. I recently bent my first cutaway sides for a Gore SS design. They were EIR. I increased the radius of the bends at the cutaway compared to Trevor's drawings and the shape is quite similar to yours. I used a side bender and heat bl...
by Woodsy23
Wed Apr 08, 2015 12:19 pm
Forum: Anything Goes
Topic: Guitar amp speaker cover, Grill etc.
Replies: 5
Views: 3647

Re: Guitar amp speaker cover, Grill etc.

I have used shade cloth (available from bunnings I think) as a speaker grille. It is readily available, comes in many colours including black and faun and seems to have the right "stretch characteristics to pull it tight over the enclosure.