Search found 368 matches

by Craig Bumgarner
Mon Feb 20, 2017 3:33 pm
Forum: Archtop Guitars and Bass Guitars
Topic: Effect of plate thickness on archtop guitar power
Replies: 16
Views: 10129

Re: Effect of plate thickness on archtop guitar power

.... In real life if the lowest back mode is tuned close in pitch to the lowest top mode the two will tend to be moving as a 'bellows' over a fairly broad range of frequencies. The lowest modes being the monopole modes? What constitutes "close"? Gore & Gilet talk about the back couple monopole bein...
by Craig Bumgarner
Fri Feb 03, 2017 2:28 pm
Forum: Flat-Top Acoustic Guitars and Bass Guitars
Topic: Making keystone style rosette pieces
Replies: 14
Views: 10212

Re: Making keystone style rosette pieces

Well, it worked out well, thanks for all your help! Drew the rosette in CAD, printed a couple copies full scale Cut out paper tiles, glued them to bits of shell and ebony. Cut the angles, left them long as Randy suggested Glued the tiles to the paper pattern, glued with CA. Glued paper with rosette ...
by Craig Bumgarner
Fri Jan 27, 2017 3:28 pm
Forum: Tools and Jigs
Topic: Small bandsaw or small table saw
Replies: 40
Views: 24045

Re: Small bandsaw or small table saw

I have a bigger better band saw in my machinery shed, but bought a Wen 3962 10" Bandsaw for $260 on Amazon a couple months ago for my dedicated guitar making shed and have been very happy with it. You get what you pay for and this one is not an industrial tool, but seems well designed and executed f...
by Craig Bumgarner
Thu Jan 12, 2017 1:24 pm
Forum: Glues and Finishes
Topic: colour coats first or second?
Replies: 17
Views: 7975

Re: colour coats first or second?

I think there a lots of people who apply the dye straight to the wood, but that never worked for me. Maybe some who does it that way can illuminate.
by Craig Bumgarner
Thu Jan 12, 2017 11:58 am
Forum: Glues and Finishes
Topic: colour coats first or second?
Replies: 17
Views: 7975

Re: colour coats first or second?

Same here, seal before color to prevent splotches. Then color, then clear coats to allow for wet sand and polish without getting into the color coat.
by Craig Bumgarner
Wed Dec 21, 2016 3:05 pm
Forum: String Instrument Repair: Practical and Political Issues
Topic: long distance cleating
Replies: 19
Views: 15597

Re: long distance cleating

The downside of the wire through a hole technique, obviously is having to deal with small holes. The string usually stains the sides of the hole so you have to fill and cover the dark stain with a bit of enamel or some other touch up. True, but the holes can be very small. I have not had a staining...
by Craig Bumgarner
Wed Dec 21, 2016 12:25 pm
Forum: String Instrument Repair: Practical and Political Issues
Topic: long distance cleating
Replies: 19
Views: 15597

Re: long distance cleating

All good suggestions. Only think I can add is working with a bright light inside the body to silhouette the crack, braces, linings etc. through the top can be more helpful than mirrors and inspection camera, both of which complicate hand/eye coordination. The mirror because the image is reversed and...
by Craig Bumgarner
Tue Dec 20, 2016 10:10 am
Forum: Flat-Top Acoustic Guitars and Bass Guitars
Topic: Making keystone style rosette pieces
Replies: 14
Views: 10212

Re: Making keystone style rosette pieces

Randy, thanks again! Yes, this sound hole is round. My comment was to plead ignorance of round sound holes, heretofore, all of mine are oval or shield shaped.

Thanks to everyone for all the suggestions! I'll post a pic when I'm done.
by Craig Bumgarner
Mon Dec 19, 2016 3:13 pm
Forum: Flat-Top Acoustic Guitars and Bass Guitars
Topic: Making keystone style rosette pieces
Replies: 14
Views: 10212

Re: Making keystone style rosette pieces

Randy, thanks for the step by step. I don't usually make round sound holes, so just to confirm, what kind of circle cutter would you use in steps 2 & 3? Dremel router tool in a rosette jig ala Stewmac's? And a spiral router bit? A 3/64" bit would give me about the right width for inner and outer bor...
by Craig Bumgarner
Fri Dec 16, 2016 3:32 pm
Forum: Flat-Top Acoustic Guitars and Bass Guitars
Topic: sticky Waverly tuners
Replies: 15
Views: 14593

Re: sticky Waverly tuners

+1 on Grover 18:1 tuners, smooth, precise, reliable and very reasonable.
by Craig Bumgarner
Fri Dec 16, 2016 12:27 pm
Forum: Flat-Top Acoustic Guitars and Bass Guitars
Topic: Making keystone style rosette pieces
Replies: 14
Views: 10212

Making keystone style rosette pieces

I have a commission with a request for a rosette made up of 24 pieces of shell and ebony. The pieces will all be identical in size & shape and will look like a keystone with rounded top and bottom to match the curve of the sound hole. I could do them by hand I suppose, but would probably be more acc...
by Craig Bumgarner
Thu Dec 15, 2016 12:06 pm
Forum: Glues and Finishes
Topic: General Finishes Waterbase Topcoat - SM is pushing this - anyone tried it?
Replies: 230
Views: 182582

Re: General Finishes Waterbase Topcoat - SM is pushing this - anyone tried it?

Found this in the product description for Enduro-var Gloss on Amazon: .... "Can be mixed with Enduro-Var Satin Urethane (25451, sold separately) to produce a semi-gloss finish." Encouraging!
by Craig Bumgarner
Thu Dec 15, 2016 11:03 am
Forum: Glues and Finishes
Topic: General Finishes Waterbase Topcoat - SM is pushing this - anyone tried it?
Replies: 230
Views: 182582

Re: General Finishes Waterbase Topcoat - SM is pushing this - anyone tried it?

Has anyone tried mixing EV Satin and Gloss? I know they make a Semi-gloss but don't have any on hand and was hoping to apply finish today. I have both Satin & Gloss and thought a mix might give something in between. I read of someone mixing Satin and Semi-gloss with good results. If no one has tried...
by Craig Bumgarner
Tue Dec 13, 2016 11:32 am
Forum: Flat-Top Acoustic Guitars and Bass Guitars
Topic: Heat bending linings
Replies: 6
Views: 3873

Re: Heat bending linings

Okay, yeah, I worry about whether I can keep them true enough. My guitars have some tight cutaways, worried about that too.
by Craig Bumgarner
Tue Dec 13, 2016 11:12 am
Forum: Flat-Top Acoustic Guitars and Bass Guitars
Topic: Heat bending linings
Replies: 6
Views: 3873

Heat bending linings

Anyone have experience with heat bending linings. I use a 1/4" x 1/2" un-kirfed binding on my guitars. I've been laminating them out of 1/28" veneers but this is a bit tedious and uses lots of glue.
by Craig Bumgarner
Mon Dec 12, 2016 10:59 am
Forum: Glues and Finishes
Topic: Testing a finish schedule
Replies: 8
Views: 3556

Re: Testing a finish schedule

The standard field test for paint and coating adhesion is the score the cured finish with a sharp knife in a 1" grid of lines, tape over with a strong adhesive tape and then rip it off. The results will be obvious.
by Craig Bumgarner
Thu Dec 08, 2016 9:36 am
Forum: Flat-Top Acoustic Guitars and Bass Guitars
Topic: Fretting, backbow
Replies: 22
Views: 11945

Re: Fretting, backbow

Fretted a new neck this morning using the tips suggested in this thread. Enlarged my slots a bit with one of many saws I have laying around so the slot was .002" over the tang width, then used the Fret Barber to take the barb width from .036" to .030". Fret went in like butter, formed well and seeme...
by Craig Bumgarner
Tue Dec 06, 2016 1:59 pm
Forum: Flat-Top Acoustic Guitars and Bass Guitars
Topic: Fretting, backbow
Replies: 22
Views: 11945

Re: Fretting, backbow

Thanks David, lots of good advice there. I find I need a good .001-.002" of clearance between the tang width and the slot width. How does one enlarge a slot by .001"-.002"? Set saw teeth a bit wider than needed and dress it down to the exact dimension in the Fret Barber? Sticky back sandpaper on a f...
by Craig Bumgarner
Tue Dec 06, 2016 9:20 am
Forum: Flat-Top Acoustic Guitars and Bass Guitars
Topic: Fretting, backbow
Replies: 22
Views: 11945

Re: Fretting, backbow

So. the next question is what IS the proper fit for fret tangs and barbs? I've gone on the assumption that the slot should be the same width as the tang and the fret wire manufacturers made the barbs to the "proper" width. How naive of me! :-) Assuming the first part of my assumption is still correc...