Search found 47 matches

by colin north
Mon Oct 23, 2023 6:25 am
Forum: Instrument Builders Forum
Topic: Help with OSMO PolyX
Replies: 6
Views: 14689

Re: Help with OSMO PolyX

I've done a guitar neck, back and side using PolyX 3043 (silk), following this advice [youtube]https://www.youtube.com/watch?v=GzNxw4zmZuc[/youtube]
No pore fill, the thin stuff first, then the PolyX, 4 coats.
by colin north
Mon Oct 23, 2023 2:25 am
Forum: Instrument Builders Forum
Topic: Measuring bridge rotation before closing the box.
Replies: 0
Views: 17205

Measuring bridge rotation before closing the box.

I've been adjusting bracing height after fully finishing my guitars through the soundhole (checking bridge rotation as I go) to obtain what sounds to me like a good balance between bass and trebles response, but it's A) really hard on the wrists and B) leaves bracing not as well shaped as I would li...
by colin north
Wed May 17, 2017 9:28 pm
Forum: Instrument Builders Forum
Topic: Blackwood milling
Replies: 14
Views: 15772

Re: Blackwood milling

A thing of beauty and a joy to behold!!
by colin north
Wed May 17, 2017 10:01 am
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Static measurement of Young's modulus
Replies: 2
Views: 5736

Re: Static measurement of Young's modulus

Trevor, you did point this out recently on the OLF to me in reply to my query, my apology, got fixated on your first reference. Thanks for your patience. Average of 16 readings is working out at 11.1 Gpa, looks ballpark for this density Lutz, (which I thought was quite stiff originally) and was bake...
by colin north
Wed May 17, 2017 12:43 am
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Static measurement of Young's modulus
Replies: 2
Views: 5736

Static measurement of Young's modulus

Soundboards - I set up a test rig using normal type supports /centre loading, used results to calculate Young's modulus, got 19000 for a density of 0.36, looks rubbish The formula I tried to use was on pg1-25 E = (P/A)/( dl / l ) where, and I can see this must be wrong because the thickness of the p...
by colin north
Mon Apr 07, 2014 6:59 am
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Parlour Build frequencies.
Replies: 14
Views: 21170

Re: Parlour Build frequencies.

Thanks for your input guys. Nice parlors!! Mine looks very plain in such company. Since my post, I've thinned the top to 2.0 mm at the bridge area and 1.8 mm round the lower bout (it's really stiff and quite heavy Eurospruce) and have fitted the neck to take a few taps I'm at 117, 227 and 262 Hz, an...
by colin north
Thu Mar 13, 2014 10:21 pm
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Parlour Build frequencies.
Replies: 14
Views: 21170

Parlour Build frequencies.

Got the box closed up on a parlour build and first indications are frequencies of 124, 249. and 265. No edge thinning has been done. Dimensions are 460 x 310 mm. Top is 2,4mm eurospruce with 6.5mm x 13mm scalloped X braces and back frequency could be taken up without too much trouble if necessary to...
by colin north
Sat May 04, 2013 10:47 pm
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: mortiser or drill press mortise attachment
Replies: 23
Views: 34943

Re: mortiser or drill press mortise attachment

I must be the odd man out. Admittedly I only use it for neck mortice/tenons a la "Book" but have found this works fine. http://www.axminster.co.uk/axminster-morticing-attachment-prod22746/?searchfor=morticing%20attachment using these, which have a stepped clearance behind the sharp end. http://www.a...
by colin north
Thu Aug 23, 2012 4:04 pm
Forum: Instrument Builders Forum
Topic: Bevel up jointer planes?
Replies: 11
Views: 11970

Re: Bevel up jointer planes?

Dominic, I hear what you as saying about hefty and low centre of gravity.
With my LN 62 I keep looking for excuses to use it, and am genuinely sorry to have to put it down.
Unless, that is, to pick up one of my LN block planes! (103 + 60 1/2)
by colin north
Thu Aug 23, 2012 11:55 am
Forum: Instrument Builders Forum
Topic: Bevel up jointer planes?
Replies: 11
Views: 11970

Re: Bevel up jointer planes?

Trevor, thanks for the clarification and the review of your use of planes, excellent, lots to digest there. I may take a road trip to one of my favorite suppliers to compare the Veritas and LN choices (and to pick up a large granite surface block - postage is not funny) Kim - HNT Gordon - really nic...
by colin north
Thu Aug 23, 2012 9:36 am
Forum: Instrument Builders Forum
Topic: Bevel up jointer planes?
Replies: 11
Views: 11970

Re: Bevel up jointer planes?

Not to disparage, but I would never use my jointer for thicknessing a back plate. Hand planer yes I would not even contemplate using an machine jointer/planer for back or top jointing. Veritas BU jointer and L-N 7 1/2 low angle jointer are both hand planes, and, as I remember, the Gore book specifi...
by colin north
Thu Aug 23, 2012 3:18 am
Forum: Instrument Builders Forum
Topic: Bevel up jointer planes?
Replies: 11
Views: 11970

Re: Bevel up jointer planes?

I don't have a my copy with me (working away from home)but I thought I remembered the Gore book recommending No 6 or 7 plane for backs??
by colin north
Wed Aug 22, 2012 4:18 pm
Forum: Instrument Builders Forum
Topic: Bevel up jointer planes?
Replies: 11
Views: 11970

Bevel up jointer planes?

I have been thinking to buy a plane for flattening/thicknessing especially back plates as per Gore/Gilet book. Looking at Veritas BU jointer and L-N 7 1/2 low angle jointer (with high bevel angle blade), and with all the tough woods down under, thought this may be a good place to ask if anyone has e...
by colin north
Fri Feb 24, 2012 10:37 pm
Forum: Instrument Builders Forum
Topic: Plate Thickness
Replies: 7
Views: 7210

Re: Plate Thickness

Tod Gilding wrote: I don't have a long reach caliper to check the centre area yet:(
Easy/cheap to make your own long reach caliper.
$20 Dial gauge clamped in a hole in the end of an arm extended over a base with a bolt (dome/polish the head) fixed in the base.
by colin north
Tue Feb 21, 2012 9:17 pm
Forum: The Gallery
Topic: A pair just finished
Replies: 6
Views: 8010

Re: A pair just finished

There should be a wolf whistle Smilie!
Those are real nice.
by colin north
Tue Feb 21, 2012 9:15 pm
Forum: The Gallery
Topic: OM Built for a friend
Replies: 7
Views: 8452

Re: OM Built for a friend

Thanks guys. Todd, there is a clear pickguard fitted, I like them because they don't hide the wood. I can just see it in the first pic. Steve, I am paid too much. Otherwise how could I build guitars!! I got several tops, lowest grade, ("C-" at the time) from Martin Ghul http://www.best-eurospruce.co...
by colin north
Tue Feb 21, 2012 10:33 am
Forum: The Gallery
Topic: OM Built for a friend
Replies: 7
Views: 8452

Re: OM Built for a friend

Thanks Todd. It sounds, well, like an OM ( I used the Kinkead book) I suppose, not to shabby. Reasonable for both pickin'n strumming. I'm not a great fan of light coloured guitars in general, but this Satinwood stuff is dense and stiff. The set rang about as good as the EIR i used for a build I did ...
by colin north
Tue Feb 21, 2012 7:51 am
Forum: The Gallery
Topic: OM Built for a friend
Replies: 7
Views: 8452

OM Built for a friend

Just thought I'd let you gays have a gander at my third build. OM, Satinwood/German Spruce with EIR binding and fingerboard, BRW bridge. Neck is Honduran Mahogany, Wenge veneer and (Rock?) Maple, salvaged from a bowling alley refurbishment. Finish Tru-oil. All woods and tuner colours were chosen by ...
by colin north
Thu Feb 16, 2012 8:57 pm
Forum: Instrument Builders Forum
Topic: Diamond Sharpening Block
Replies: 2
Views: 3580

Re: Diamond Sharpening Block

I was there today, picked one up, then said naah can;t be much good at that price , put it down and moved on to the meat case. Rod. I have two of them bought 3 years apart. Still using the first, the other as a spare. Both used for rough work (removing chips in chisels, smoothing sides of chisels, ...
by colin north
Wed Feb 15, 2012 1:45 am
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Bit of luck cutting neck tenon as per "The Book"
Replies: 1
Views: 4457

Bit of luck cutting neck tenon as per "The Book"

Following the method for bandsawing out the tenon as Trevor (and Gerard) show in the build book, I was able to cut in from both sides of it all the way to the cheeks instead of finishing the cut with a tenon saw. I only have a 250 mm "light trade" bandsaw, but by taking of some of the width of the n...
by colin north
Wed Nov 23, 2011 9:17 am
Forum: Instrument Builders Forum
Topic: Drum sander - finishing touches.
Replies: 45
Views: 39451

Re: Drum sander - finishing touches.

Just did this with the oven cleaner/nail brush/clean water rinse for the first time recently and 5 from 6 strips turned up virtually like new.
by colin north
Sun Oct 30, 2011 3:45 pm
Forum: Instrument Builders Forum
Topic: Gore/Gilet Book Body Plate Thicknessing Board
Replies: 5
Views: 6657

Re: Gore/Gilet Book Body Plate Thicknessing Board

Ouch!
Thanks for the warning.
by colin north
Sun Oct 16, 2011 8:20 pm
Forum: Contemporary Acoustic Guitar Design and Build - Trevor Gore
Topic: Falcate Bracing - Glues/Resin clarification
Replies: 18
Views: 23542

Re: Falcate Bracing - Glues/Resin clarification

That saved me asking the same question, thank you gentlemen!
by colin north
Fri Oct 14, 2011 6:51 pm
Forum: Anything Goes
Topic: Cool Stuff you've scored from work
Replies: 12
Views: 11220

Re: Cool Stuff you've scored from work

Wot! No Pics!! :cl
by colin north
Fri Oct 14, 2011 4:54 am
Forum: Anything Goes
Topic: Cool Stuff you've scored from work
Replies: 12
Views: 11220

Re: Cool Stuff you've scored from work

Don't you dare bring Elvis Costello into this conversation!!