Search found 30 matches

by Matt Cushman
Sat Sep 26, 2015 10:01 am
Forum: Archtop Guitars and Bass Guitars
Topic: fretting question
Replies: 23
Views: 20228

Re: fretting question

I always try to preserve the slots as they are. That is why I alter the fret to fit the slot. Too much fret wedging is always a concern. Frets that are crushed into the slot are more likely to damage the board when pulled for replacement. For a good fit much of the wire is to wide for my slots LMII ...
by Matt Cushman
Fri Sep 25, 2015 3:50 pm
Forum: Archtop Guitars and Bass Guitars
Topic: fretting question
Replies: 23
Views: 20228

Re: fretting question

When the fret barbs are too wide for the slot I just file off some of the barb till I have the fit I am looking for. I made a device for filing fret barbs down to size.
by Matt Cushman
Fri Sep 11, 2015 4:27 pm
Forum: Archtop Guitars and Bass Guitars
Topic: Am I using the correct formula for downward force?
Replies: 11
Views: 11510

Re: Am I using the correct formula for downward force?

In my copy of the Benedetto book on page 178 Bob says "The optimum string angle from the bridge to the tailpiece is 13 or 14 degrees." I have a set of plans for a Benedetto guitar and it shows 13 or 14 degrees. So 12 degrees seems about right to me. I am not sure where Bob shows 6 degrees ...
by Matt Cushman
Tue Sep 08, 2015 9:40 am
Forum: Archtop Guitars and Bass Guitars
Topic: Am I using the correct formula for downward force?
Replies: 11
Views: 11510

Re: Am I using the correct formula for downward force?

Your formula is correct. More than likely your angle is measured correctly and the string tension is also likely to be close to correct. It is possible that the back not being attached may have had some effect on top deflection when you did your testing.
by Matt Cushman
Wed Aug 19, 2015 9:49 am
Forum: Flat-Top Acoustic Guitars and Bass Guitars
Topic: Side/rib reinforcements- when/where/how many?
Replies: 40
Views: 42256

Re: Side/rib reinforcements- when/where/how many?

It may depend on the type wood the sides are made from. For Maple a full width side brace is a good idea to help prevent warping or cracking. I have used some Maple for sides that had to be braced. The only reason I used it for sides was because it was so nicely figured.
by Matt Cushman
Fri Jun 26, 2015 2:50 pm
Forum: Archtop Guitars and Bass Guitars
Topic: How do you sharpen a curved plane blade?
Replies: 3
Views: 5130

Re: How do you sharpen a curved plane blade?

I got this idea from an old issue of the GAL, I'm not sure of the issue number. This one is a modified plane and blade with a more curved bottom. Not a perfect solution but it works ok.
by Matt Cushman
Thu Jun 25, 2015 10:11 am
Forum: Glues and Finishes
Topic: Using large decal on back of solid body
Replies: 7
Views: 7736

Re: Using large decal on back of solid body

I think I would try to put the decal on between coats of shellac or water based lacquer. The decal will work best over a very smooth surface. I have sandwiched small decals on models this way using waterborne lacquer. I don't know if shellac works on decals but it will bond to most surfaces. The pro...
by Matt Cushman
Thu Jun 04, 2015 8:52 pm
Forum: Archtop Guitars and Bass Guitars
Topic: Weird intonation problem !!!
Replies: 14
Views: 11979

Re: Weird intonation problem !!!

Is the low E saddle maxed out to the back of the bridge? Some of these Epiphones max out short of correct intonation on the low E string. I have seen at least 2 that had this problem.
by Matt Cushman
Sat May 30, 2015 4:15 pm
Forum: String Instrument Repair: Practical and Political Issues
Topic: Ethics: Epiphone Archtop Binding replacement
Replies: 12
Views: 12757

Re: Ethics: Epiphone Archtop Binding replacement

The fiber looks like plastic but wont deteriorate with the passage of time as the original did.
by Matt Cushman
Sat May 30, 2015 12:00 pm
Forum: String Instrument Repair: Practical and Political Issues
Topic: Ethics: Epiphone Archtop Binding replacement
Replies: 12
Views: 12757

Re: Ethics: Epiphone Archtop Binding replacement

LMII has it. I think they call it fiber veneer. The black works great for the back side of a headstock! It is a low cost alternative to plastic. If anyone does try it, be sure to sand off the outside protective coating before gluing. Once sanded most glues should bond well with it.
by Matt Cushman
Sat May 30, 2015 9:44 am
Forum: String Instrument Repair: Practical and Political Issues
Topic: Ethics: Epiphone Archtop Binding replacement
Replies: 12
Views: 12757

Re: Ethics: Epiphone Archtop Binding replacement

For a non plastic binding white fiber might work for you. This is only good for areas that are finished. It wont work for the fingerboard surface. I use fiber almost exclusively on my mandolins and my archtop guitars. Vulcanized cellulose is very durable and makes a good binding material for body an...
by Matt Cushman
Mon Mar 09, 2015 7:09 pm
Forum: String Instrument Repair: Practical and Political Issues
Topic: liquid hide glue is no good?
Replies: 11
Views: 11710

Re: liquid hide glue is no good?

I just thought I would add to what I said before. I use hot hide glue for almost every joint on my mandos and guitars. The liquid glue is good for frets as it adheres to metal better than HHG. I like using hot hide glue. For me it is the easiest glue to use for most building tasks. I don't use the b...
by Matt Cushman
Mon Mar 09, 2015 10:08 am
Forum: String Instrument Repair: Practical and Political Issues
Topic: liquid hide glue is no good?
Replies: 11
Views: 11710

Re: liquid hide glue is no good?

Liquid hide glue has always worked very well for me. Just be sure it is a fresh bottle. I have used it to attach fiber binding and purfling. I also glue in frets with it. If you mix a little liquid hide glue with hot hide glue you can extend the open time of your hot hide glue a lot. If you don't kn...
by Matt Cushman
Thu Dec 11, 2014 10:43 am
Forum: Tools and Jigs
Topic: neck shaping jig
Replies: 10
Views: 9339

Re: neck shaping jig

American Lutherie number 73 has Pantograph neck shaft duplicator by Mike Doolin. It looks easy to build .
by Matt Cushman
Thu Dec 11, 2014 10:30 am
Forum: Jam Session
Topic: December Giveaway
Replies: 43
Views: 42821

Re: December Giveaway

Count me in. Thanks!
by Matt Cushman
Tue Dec 09, 2014 12:43 pm
Forum: Glues and Finishes
Topic: How can I enhance walnut figure contrast?
Replies: 31
Views: 30764

Re: How can I enhance walnut figure contrast?

If you have some scrap wood for tests you could try a weak mix of light brown trans tint dye. It will probably darken more anywhere that is end grained. Dye can enhance the figure of some woods without changing the color very much if you can find a good match.
by Matt Cushman
Sat Dec 06, 2014 11:07 am
Forum: Archtop Guitars and Bass Guitars
Topic: how to secure a ebony pickguard
Replies: 6
Views: 6425

Re: how to secure a ebony pickguard

If you mount a suspended pickup to the fingerrest some adjustment is handy for getting proper placement of your pickup. One way to get some height adjustment is to drill the mounting block with two holes. One round hole and one U shaped hole or slot. Use two threaded inserts in the fingerboard exten...
by Matt Cushman
Thu Nov 20, 2014 10:48 am
Forum: Glues and Finishes
Topic: Where has all the 3/4" masking tape gone???
Replies: 49
Views: 41802

Re: Where has all the 3/4" masking tape gone???

You can cut wide tape down to the width you need. It's easy if you have a drill press. Just chuck a mandrel with a cutting disk in and adjust the table for the width you want. Then turn the roll on it's side and carefully cut a groove around the roll of tape. Be careful it can bind up on you if you ...
by Matt Cushman
Tue Nov 18, 2014 11:17 am
Forum: Tools and Jigs
Topic: Binding Machines - Thoughts?
Replies: 30
Views: 38614

Re: Binding Machines - Thoughts?

After you build a cradle for holding the instrument you can use the cradle for many other tasks. Both machines look well made. I like the vertical stationary type. I have a similar setup. I used springs to counter the router weight. I also think it is a lot safer for the operator. Thanks for showing...
by Matt Cushman
Tue Oct 21, 2014 10:42 am
Forum: Glues and Finishes
Topic: Upright basses and Hide Glue
Replies: 7
Views: 6563

Re: Upright basses and Hide Glue

When I glue up my archtops I use alignment pins on the top and back. With two pins ( small dia. wood dowels ) you can quickly locate the plate. Then use a clamping caul to speed the clamping process. The whole thing takes less than a minute. The pins are useful during construction also. I put one un...

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