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Finished! A Bridge Too Far?


Andyjr1515
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First dozen frets installed :) :



In the 'hammer them or caul them' debate, I do a bit of both.

I put them in 4 at a time, using the 'fret radiused tighter than the fretboard, tiny bead of titebond on the tangs, then tap one side, tap the other side, tap the middle' method to make sure the tangs are properly locked in. I then clamp the appropriate radius block on the four I've just done for half an hour or so.

Note I've finished the ends on the bass side before installing. I will do that also on the upper frets where the slots are blind due to the upper horn.

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[quote name='TheGreek' timestamp='1497642633' post='3319793']
Feels like the end is in sight....here's to sleepless nights between now and then.
[/quote]
Nine and a half 'to-do's' left on my list.

I have to say that I'm extremely pleased how this is starting to look and feel. The final carves and shaping always does pull the whole thing together - and it certainly is doing with this one. I know I say this every time - but I've got a feeling in my water that this is going to be one of my best yet :D

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[quote name='LukeFRC' timestamp='1497653556' post='3319896']
so one of the nine will be... what kinda finish is it going to have?
[/quote]
As natural as I can make it. Probably truoil slurry and buff. I think the silky smooth organic feel will be just right. It will darken the wood a touch, but not much.

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[quote name='Andyjr1515' timestamp='1497537866' post='3318961']
Luminlay fretmarkers installed:


By the way, Mick - don't panic. That's the garden chair it was on and not the lower horn!
[/quote]

As already said the fretmarkers with the surrounds and accent line look fantastic!

Also loving the stripy effect on the headstock. I know its nothing new but it really looks classy.

And dare I say this but I love the Flock of Seagulls headstock inlays haha. It does remind me of said bands album covers (in a good way).

Edited by Twincam
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[quote name='Twincam' timestamp='1497658695' post='3319926']

And dare I say this but I love the Flock of Seagulls headstock inlays haha. It does remind me of said bands album covers (in a good way).
[/quote]

Seagulls? Hmmm....they're OK, I suppose. They are superlative gliders and remind us all of the seaside...and rubbish tips

But Swifts - now then, they are MUCH more classy...

https://www.youtube.com/watch?v=Rd3NlfbA7yQ

:D

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Thanks, folks :)

Next big task is the control chamber and cover. This is a bit chicken and egg and will need me to make up some routing templates. Looking at the John East pre-amp circuit that Jez (Jabba_the_gut) sent to me, there are optional connection points for master vol, piezo / magnetic blend, piezo tone and magnetic tone. So hang it - may as well try to get ALL of those in, if I can :D

To get the above in full, I need one more pot - Artec do a mini concentric pot that I could use for the two tones, but in terms of footprint, this is basically how it would fit (and also these are not the final knobs):


If the concentric tones is a no go, actually the above would work with a dual gang pot, one wired to the piezo and one to the magnetic and then just use the blend to get the right vibe...

Either way, with a bit of squaring off of the two chambers, it will fit. The usability is also OK - you would just reach down and roll the knobs from their sides.

I do need to get the dividing wall quite a bit thinner - the two pots John recommends for the blend and master volume are only available in short thread. With care, though, it should be fine.

Once the shape of the chamber has been tweaked, I can then rout the rebate for the cover...

Oh - and ignore the ragged corner of the tuner block chamber - haven't got there yet!

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[quote name='TheGreek' timestamp='1497793643' post='3320576']
Most of that was Japanese to me but it's good to read that the vital organs are starting to go in....
[/quote]

Yes - finishing the control chamber shape and its cover means the final sanding can be done and then the finishing started. It's one of the last big steps..the remaining stuff is more routine :)

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Bit of progress on this. I've lengthened the chamber to allow for a bit more space between the knobs and also to allow a comfortable distance between the last knob and the jack.

I've also done the cover rebate - the wider areas are to give me room to fit the magnets.


After a final tidying up of the rebate shape, I will see if I can cut a nice tight-fitting cover. Probably a 'tomorrow job' :D

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Got a bit distracted with exciting stuff through the post (bone for acoustic saddle, battery clips, electrical stuff) and planning the final steps ;)

Cover should be cut tomorrow (today's tomorrow rather than yesterday's tomorow... ) :)

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The thing I've been pondering is the bridge saddle. I'm going to be fitting an acoustic-style saddle with a piezo element underneath it - this is just a scrap 6-string acoustic saddle, but it illustrates the kind of thing:


Having built a couple of acoustics in my past, I am acutely aware that the saddle intonation angle has to be accurately predetermined - it's pretty non-adjustable once the slot for it is cut.

Because the intonation varies from bass to bass from a number of factors, I need to be pretty certain what this needs to be before I cut the slot.

The starting point is usually "G string at 1/2mm behind scale length, bottom E at 3mm behind scale length" but I want to be more certain than that. So what I am planning is this:[list]
[*]Drill the string exit holes in the headstock
[*]Fit the underside headstock clamp
[*]Fit the tuner block
[*]String it up with a temporary loose saddle, tuned to normal pitch, fully set-up truss-rod wise, etc
[*]Sort the intonation as you would with a floating bridge (like on Hofner Violin Basses)
[*]Mark the position
[*]Cut the saddle slot
[/list]
I did consider making a low profile semi-floating bridge, but I think it would detract from the clean lines....

Gosh...there's a lot of sit-and-ponder-while-sitting-on-hands time involved in this project! :rolleyes:

Edited by Andyjr1515
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It's been a good morning so far. Through the post came the mini stacked pot, so now we have the capability for:[list]
[*]Master Volume
[*]Piezo / Magnetic Blend
[*]Piezo Tone
[*]Magnetic Tone
[/list]



Also, I tried out an idea put forward by a member of TheFretboard forum to get a better security on the short-threaded specialist pots I needed to get (which were only available with short thread) - using a threaded bush rather than a nut.

Of course, there is no such thing as a 7mm threaded bush!!! (6mm yes, 8mm yes) so I got an old externally threaded machine head bush, bored it out a touch and threaded it to 7mm inside - works an absolute treat!:


Edited by Andyjr1515
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[quote name='Oopsdabassist' timestamp='1498049068' post='3322208']
Outstanding! Proper 'outside the box' thinking :)
[/quote]
All credit to Sporky of the other forum. My thinking is quite often 'in a sealed plastic bag' :lol:

Edited by Andyjr1515
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OK - this is where everyone thinks, "Oh that's that, then - it's finished!"

It's far from finished but, to misquote Churchill, we may well at least have got from 'the end of the beginning to the beginning of the end'

I have some strings on:








It's fitted with some spare strings I keep for the purpose. I will need to string with Mick's favourites to sort out the final saddle position but the less they are messed about with the better.

At the moment these are just single clamped at the headstock and it's holding great. Double-clamped will hold excellently.

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