Cwmwenallt Musings

February 28, 2010

Bodytalk

Filed under: Guitar, building, ghettocaster — Sean @ 4:46 pm

The last couple of weeks, as time has permitted, I have mostly been focussing on the bodywork of the guitar. After cruising the guitar builder forums, I decided to finish the body in a product called tru-oil, which is a linseed oil based varnish intended for gun stocks; but makes a nice smooth and breathable finish for guitars. I also took the trouble to line the pickup pockets with a special conductive paint I got from stewmac. I was going to use copper foil, but this seems a lot neater.

Product placement:Product placement

After about 5 or 6 rounds of sanding, and rubbing on the varnish, the body looks pretty splendid, and smells like an old school desk. Hopefully the smell will wear off!

I didnt go to a really high gloss shine, although apparently the tru oil will do that, because I wanted it to look and feel like a piece of wood.

Body shot

In this second picture I angled it so you can see it catching the light, which shows of the finish a little better.

Body shot

here is a closeup of the pockets with a couple of coats of the conducting paint applied.

Painted pockets

After assembling the guitar and a fair bit of fiddling with the little screws on the nut and bridge, it was finally set up and in tune.

Body shot

And here she is in all her glory. Not quite done yet, still have the electrics to sort out, and the pickguard is roughly cut out of a bit of mounting card (and not the final shape either). But it does sound quite good, the card acts as a little sound board and it really holds a sustain well.

Full shot

So. its official, I’ve built a guitar.

Next up is the electrics, where I’ve had a bit of a brainwave. So hold tight for that. Also in terms of practice, the black water side piece is coming together fairly well now, although I’m not going to be rivalling Bert any time soon, so I’ve added a new piece to the schedule. its called Andante in C by Mauro Giuliani; better known to the over 30’s in the audience as the “Tales of the Riverbank” Theme Music, the score is available here if you want to have a go, its fairly straightforward although there are a couple of tricky middle bits.

So thats it twang fans, until next time.

February 15, 2010

Doing my nut

Filed under: Guitar, building, ghettocaster — Sean @ 3:15 pm

Hopefully the irony in the title translates, after you’ve read the article.

Today was quite a watershed day for the ghettocaster, I was going to post on the Sunday assessment, albeit a day late; but I just had to get this out there. The Sunday assessment for this week may go out a little late. If you are interested however, the practice piece for the coming few weeks is the traditional tune “black water side”, as played by Bert Jansch; a beautiful piece and probably beyond me, but I’ll be doing a separate post on it soon.

So – back to the ghettocaster. I’ve been stressing about whether this concept is actually going to work, as the profile and angle of the neck are set up for the higher Gibson style bridge. I wasn’t helped by the fact that the nut as supplied with the neck, not only is a rather ugly black, also has zero clearance for the string.

The original nut, as supplied with the neck

So, I thought, what I probably need is an adjustable nut so that I can dial in the height once the guitar is put together. A quick search revelaed more or less what I was looking for on eBay, and a few days later, here it is, in a rather fetching matching gold-bling finish:

New locking nut in fetching gold colour

So, barely pausing to think through whether this was a good idea, I proceeded to slice off the back of the nut slot to create a little platform for this nut to sit on:

Removing the back of the nut slot

And after a little sanding and cleanup with chisel, this is what it looked like.

Finished nut ledge

Unfortunately, this is where the trouble started; the first problem was that when I tried to screw the block in place the little gold screw proved to be rather weak, and conveniently sheared off inside the wood. So that set me back a frustrating hour trying to extract it. Which entailed lowering the base of the platform by a couple of mm in order to get the grippers to attach to the stub of the screw

Sheared screw

Then, blow me if the next one didn’t do exactly the same, Aargh! However by this stage I’d lowered the platform as much as I dared, but also I’d noticed another problem. When the height raising screws were engaged, they cause nut to angle slightly, which moves the leading edge of the nut back from the end of the fretboard by about a millimeter. My concern was that, even if I could compensate for this by moving the bridge, it would mess up the positioning of all the frets, making the whole thing impossible to tune.

So, I slept on it.

In the morning I resolved to fix both problems by a fairly radical step, which was to remove 1mm from the end of the fretboard. This solved both issues, by moving the screw hole away from the stub-end embedded in the neck, and allowing the nut to move back and preserve the original distance from nut to first fret.

And, seemingly it worked, however to check it out properly I really needed to actually attache the neck, so out with the drill (finally located it in the old piggery!), and whizz whizz, four neat holes:

Holes drilled for neck bolts - front view

And here they are form the back:

Holes drilled for neck bolts - back view

Then I bolted the neck on, unshimmed to see what the default angle would give, and after screwing down the bridge plate, I attached a string:

First string mounted

It actually became a guitar for the first time…. wow.

What’s more, after a little tentative tuning, taking it slowly in case anything gave; I actually got it up to concert pitch:

first string in tune

I fiddled around with the height of the nut to set the string clearance at the first fret to 0.09 , (midway between the recommended settings in my trusty Hanes manual for the telecaster), then I raised the bridge till the buzzing stopped, which was quite high, but still well within the prameters the bridge screw allows. You can see the height in this picture:

Height of bridge after eliminating buzz

I had to dial in a little extra neck relief, which enabled me to lower the bridge a little, so now this E string is pretty playable the whole way up the neck. I checked the intonation at the 12th fret, and its pretty close, the notes at the other frets seem to be fairly accurate too. I still need to figure out what they actually should be based on equal temprament tuning, but I’m fairly confident now this is going to work.

Whew,

See you next time for the rest of the intial setting up, and more on actual playing.

toodle pip.
Sean.

February 7, 2010

Where’s that confounded bridge…

Filed under: Guitar, building, ghettocaster — Sean @ 5:17 pm

[spot the obscure Led Zeppelin reference - answers on a postcard please]

So, another Sunday comes and goes with no assessment, have I given up entirely you’re all [not] wondering. Well no, thing is I’ve been travelling which has made regular practice something of a problem (although I did find a creative solution – more on that in a later post prhaps).

However the point of today’s missive is to update you on the progress of the ghettocaster, which has been sadly neglected of late, although still oft in my thoughts. I took the opportunity while in the US to visit a couple of guitar shops, and taking advantage of the exchange rate, purchased myself a nice little Seymour Duncan Telecaster bridge pickup. And here it is mounted in the Wilkinson bridge.

Seymour Duncan pickup fitted into Tele bridge

The pickup doesn’t need to be mounted directly to the guitar – see how it hangs off the bridge:

Depth of pickup behind bridge unit

This means the bridge vibrations are transmitted to the pickup directly and so adding to that trademark twangy Tele sound.

But it does require a hole to accommodate that depth behind the bridge unit. And now the die is cast, I do have to whack out a little hole to put it in. So again out with the chisels (A router would probably be much quicker, but I don’t have one and am somewhat wary of losing a finger learning how to use one).

Anyway, before putting the pickup in the bridge unit, I carefully traced an outline on the body.

Markup of pickup shape on body

And then tap, tap tap…

Starting to chip out hole

…for about 45 minutes, until.

Completed hole

Ta. Da.

Well its a bit rough, I’m sure a router would have done a much better job, but the price was right, and the pickup fits. Most of the messy edges are going to be covered by copper shielding and the bridge pickup anyway so I’m satisfied.

Next issue is how to route the wire (that big black one in the picture above) out of the hole and into the cavity where all the controls will live. I can’t find my drill right now, so that will be an exercise for another day.

So. there we are, another small but significant step forward.

Oh and by the way I am practising still, if you recall the game-plan was to learn ‘Dee’ by Randy Rhoads; well I can just about play it all the way through now, but there are some tricky little changes in there, and its not that smooth. So I’m still working on it again all this week. Next week I’ll be getting back to the formal book plan.

So, thats it, keep on twanging,

Sean.

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