Friday 29 April 2011

New Dot Markers

George is a 'Man Of ROCK' - as a result he has problems seeing his position markers at dark gigs.
 His bass is black and the markers small, not a good combination.





So when he brought his bass in with a broken headstock (I told you he's rock'n' roll) I took the opportunity to replace the side dot markers with slightly larger ones.
 I've decided on 3.2mm white plastic markers.
 I custom make dot's using the drill press.
 The first stage is to grind the butt end of a 3.2mm drill bit flat.


I clamp a block of mild steel to the drill press base and drill a hole in it using the drill bit.






Then without moving the steel block I take the drill bit out and turn it around so the butt end is facing down.





 The drill is an exact fit in the hole and lines up perfectly. You can see I've used this block before.
 I've made a press to punch out dots.





I use an old piece of pickguard material. While I'm about it I punch out 50 or so - won't need to do this job again for a while.





I enlarge the existing holes in the guitar and glue the dots in with superglue gel.





When the glue's dry I shave it flush with a sharp chisel and the job's done.

With any luck he'll be able to see what he's doing now.

George also runs The Killingroom rehersal space here in Auckland - www.thekillingroom.com - my band uses it, why don't you?


Cheers
    Glyn



………………………………………………………………………………………….

Wednesday 2 March 2011

Guitar cutting out

A number of things can cause your guitar to cut out but the number one most likely is the jack socket.
 If a guitar hasn't been plugged in for a while or been left in a damp environment it can often develop electrical problems. Electrical component can oxidize and cause contacts to become intermittent or fail completely. The most common problem is with jack sockets.


The inside, ring part of the jack becomes 'dirty' with oxidization and no longer makes correct contact.The result is loud humming, crackling or cutting out.
 The answer is very easy:
 Take a rolled up piece of wet-n-dry paper (about 600 grade) and clean the jack with it.


You can see dirt that came out of this Les Paul's jack.
 The process can be made a little easier by spraying contact cleaner into the jack as well to help dissolve the dirt.


Contact cleaner dissolves the 'poo' and then evaporates away so as not to attract dirt.
 The job is quick and easy. I always keep some 600 grade in my gig bag just in case - it could save a lot of embarrassment on stage.
 All guitars are susceptible to this problem - it doesn't matter if you play a vintage Strat, a new Les Paul or a real cheapie, eventually the jack will need a clean.
 If symptoms persist get it checked out - the jack may need replacing or there could be another fault.

Cheers
    Glyn


………………………………………………………………………………………….

Saturday 12 February 2011

Battery compartment for EMG's




This is most definitely a ROCK guitar- it's a Dean Dime-o-Flage.
 The owner has decided to swap the stock pickups for EMG's and has gone for the classic 81,85 combination. 


He's going for the 18 volt option which gives the pickups a little more headroom He's fitted the pickups himself and intends to wire in the EMG pots etc. but has a slight problem:


There's no space for one battery let alone two. So he's brought the guitar to me to route a cavity and to fit a battery compartment.
 We're limited as to where it can go. The guitar has a narrow waist and the pickup cavities have been routed from the other side - I don't want to route through to one of those. I need to be able to drill a hole from the new cavity to an existing one to run the wires. We decided to put it just above the string anchor points.


Routing is not a job for the faint hearted  - if you've never used one and fancy giving it a go - get some tuition. I used to tell my students "no one ever had a minor accident with a router", not strictly true but it focused their minds.
 I'm using my 1/2" shank Makita router for this job.


 I'm using a 1/4" cutter and a 10mm guide bush to follow the template. My template is cut 2mm oversized to allow for the difference in size between the cutter and the guide bush.


 The template is made from 6mm clear plexiglass, it's hard wearing and being able to see through it helps with positioning it accurately.


I first route a test run on a piece of scrap to make sure it will be the right size for the new battery box. You can see I've used this piece of scrap before.


Routing is noisy and dusty and there can be flying chips - I never take any chances.


 I put masking tape over the area and mark the exact location on it. I align the template and clamp it in place.


 I check it after the first pass - all looks good. Then it's a case of gradually increasing the depth down to 33mm in this case. This guitar body is made of basswood so it's easy going for the router. I'm quite a fan of the loose, open sound of softer hardwoods like basswood and alder and of course they are kinder on the tools.




It's a big hole.


Here's the finished battery compartment. I've drilled a hole through to the control cavity and fed the wires through. The rest is up to him.


Glyn


………………………………………………………………………………………….

Monday 24 January 2011

Gibson Songwriter - neck break

I got back to the workshop after my xmas break, the phone rang and this became my first job of the year.





 Ugly isn't it!
 The head has been broken in a fairly typical way - I see this a lot and it is a routine job.
But this one has been 'repaired' badly and the glue has failed. Then they tried bolting it together and the result is obvious from the photo.



 The bolts were tight enough to crush the face of the headstock - Its all a bit of a mess.

 The unsuccessful repair makes it more complicated. I can't glue it back together - sticking failed glue to failed glue just isn't going to work.
 I decided to cut out the damaged area and replace it with good wood.
 I called the owner with my solution to his problem and he was a little reluctant at first (quite understandable). But in the end he gave me the 'go ahead'.


 I made two saw cuts to define the section to be replaced and started removing mahogany with a sharp chisel. You can see one of the cuts on the left of the picture. I use a Japanese Saw - they're very accurate.
 I'm going to leave the veneer on the front face of the headstock to give extra support and glue surface area. This makes it a lot harder but I think its worth it.



You can see the truss rod exposed in the middle of this picture. Sometimes things have to look worse before they can look better. This is not a job for the faint hearted - it is a Gibson after all.



I carve a block of mahogany to fit the area I have cut out. I glue and clamp it in place.

 


The new piece does look a little incongruous - there's a touch of Frankenstein's monster to it.


Here I've started to carve it. It's a sharp chisel job - it has been pointed out to me how much I go on about sharp chisels in this blog but I just can't help it.
Now its just a case of shaping it so it looks like a guitar neck again.




 So here's the finished article. The owner didn't want any spray job (the cost can be quite high) so I just gave it a couple of coats of clear lacquer to seal it.
 I'm pleased with it - saved a nice Gibson neck from the scrap heap.

   Glyn



………………………………………………………………………………………….


I am no longer repairing guitars - since covid 19 I now work full time making pickups