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Fretless 5 comp/showcase - the "*@#$ Cancer" Bass

Thanks, everyone!

Nice work Kev, keep it comming. What was your reference thickness for the top? How much of the arch did you keep within that reference before you tapered to the edge?

ML - well, the thickness of the top started out at about 5/8". Next time I'd like to start at 3/4". The edges were intially taken down to 1/4", but I'm thinking that they'll lose another 1/16" with final sanding/shaping. Top tickness varies from about 2mm at the thinnest to about 5mm under the bridge area. I'm feeling a lot of flex in the top when I push down on it on the bench, so I definitely don't want to go any thinner there. I'm contemplating installing a couple of cross braces. Hope that answers your question.

Thanks, Kev
 
*sigh*

I feel so very inept now. This makes my projects look like Lego blocks.

What strings do you plan on using? I think I'd go with TI Jazz Flats, to keep the stresses down.
 
*sigh*

I feel so very inept now. This makes my projects look like Lego blocks. What strings do you plan on using? I think I'd go with TI Jazz Flats, to keep the stresses down.

It's really not that difficult. Seriously. Just individual pieces of the puzzle, that's all. :cool: Actually, after hours of playing with my son and his Lego(TM), I was thinking a Lego bass would be neat...

I'm hoping to use La Bella black tapewound flats on it. I've heard great things about them, and I think they'd look cool on the bass. Are the tapewounds particularly tight? (B string is a .128, IIRC)
 
I'm hoping to use La Bella black tapewound flats on it. I've heard great things about them, and I think they'd look cool on the bass. Are the tapewounds particularly tight? (B string is a .128, IIRC)

Juststrings.com lists string gauge (in inches) and tension (in lbs) for the strings they sell:

TI Jazz Flats JF345:

1st G - .043 - 37.03
2nd D - .056 - 37.47
3rd A - .070 - 31.30
4th E - .100 - 34.39
5th B - .136 - 34.83

...aaaaaaaaaand the tension isn't listed for the La Bellas. Google turned up no actual data, although it did offer up this TB thread on La Bella tapes versus Fender tapes:

http://www.talkbass.com/forum/f16/f...-la-bella-760n-black-nylon-tapewounds-578415/

Sounds like the La Bellas are medium-to-medium-high on the tension scale, which is possibly more than the TIs. ???
 
Hey, time flies when you're trying to build a bass to a deadline... :smug: I'm still here - life, gigs, treatments, etc. family all take up time.

So, I've been puttering away at this thing, and it's coming along.

Cut the bridge and tailpiece blanks from a hunk of ebony:

March20th001.jpg


Yeah, they don't look like much, so I carved them into something a bit more useful. Still more or less roughed in, waiting for final shaping:

March20th002.jpg


That's a crappy picture, the ebony looks way nicer in reality. The strings will come through the the back (sorry no pics of the ferrules yet) through the tailpiece which will be inset into the top and glued to the inside block, and then over the bridge, which will be held in place by string pressure only.

Electronics: I forgot to mention along the way that this will be a piezo-only bass. Early in the build TB's very own moderator Marshall Perry (SMPerry) donated a near pristine Rick Turner (made by Highlander) piezo preamp that he felt was in need of a good home. :hyper: I'm forever in his debt for his generosity.

preampinbody2.jpg


Well, that decided that the bass would be without a magnetic pup, which I think is appropriate for this type of bass anyway. I looked around for piezo systems and settled on some RMC 'bass excellence' bridge transducers:

BEX15-500.jpg


So, these will be set into the bridge, go through the top and connect to the preamp. The preamp 'tone' controls are pretty basic - high cut and bass boost, internally. So that just leaves the volume control. I didn't want to foul the nice cedar top with one ugly knob (two, when I'm playing it :bassist:), so my good buddy Paul came up with an excellent solution: we're going to use a Schatten style wheel pot, mounted just inside one of the 'f' holes in the top. Virtually invisible, yet highly accessible!

So the problem remained - how to mount this preamp in a hollow body? Again, I didn't want to mess up the nice cherry back with an access port, and the pre is a bit of an awkward size, so after considerable debate and head-scratching I came up with the idea of a side-drawer. The pics are worth 1000 of my klutzy words, but basically the pre will sit inside a shielded side-mount drawer thingy, held in place with rare earth magnets. In the rare (no pun intended) event I want to access the tone controls or change the batteries, I can just pop the drawer out. That area of the bass is seldom seen, and now I have a clean top and back to the bass!:

March20th003.jpg


March20th004.jpg


It's sliding on some sheet metal runners, and is pretty smooth and sits nicely when closed. Oh -the back of the drawer has a sheet metal jack plate: the 5 RMC pup leads will be bundled together and go into the jack plate via an RCA plug, and the volume control will connect via a 1/8" TRS plug. The intrument cable jack (also TRS) will pop though the outer side of the drawer. Clear as mud? Well, it was a very interesting and time-consuming diversion, hopefully it'll be worth it.

Hmm. I also carved a single brace for the inside of the top, mounted just in front of where the bridge will sit:

March20th006.jpg


I also drilled for the tuners, and here they are roughly in place:

March20th007.jpg


And, I've spent a surprising amount of time sanding, shaping, caressing the bass here and there. Oh, and I finally glued the fboard on...

Sorry about the length and breath of this post - I've been a bit negligent in keeping this build updated. Still a lot of work to do, and with a four-day road trip o' gigs coming up, followed directly by a treatment day, which lays me low for a few days, I'm not 100% sure it'll be completed by the deadline. Here's hoping, though!

Thanks for watching,

Kev
 
Ah - I've been wondering what was up in Kev-land. Love this build - very inspiring. Good work on the side-drawer, though I still can't quite visualize how the finished product will be wired. Very interested in seeing more progress!
 
Wow! Super creative solution for the pre. I guess I should take a look at some of your other builds. I'm glad to hear that things are moving along in the right direction.

(BTW, you giggin' locally?)

Other builds? :hmm: This is my first build...

Upcoming gigs aren't local - I'm off to Winnipeg for a bunch of shows with the Winnipeg Symphony Orchestra: Rock band + orchestra, performing a concert eversion of Dark Side of the Moon plus some other peiod prog rock. I can probably get a pair of comps for the first Winnipeg (or area) TB-er who pmails me.