slingblader Posted May 27, 2022 Author Share Posted May 27, 2022 This was on my bench this evening. My Dad's 1961(ish) Harmony Rocket. I disassembled it as far as I could. I cleaned everything and gave it the first fretjob that it ever had... like it literally never had anything done at the factory aside from beveling the fret ends... and decades of playing cowboy chords pretty much decimated everything below the 5th fret. Restrung it with flats just like it had when he bought it. Plays and sounds great. 10 Quote Link to comment Share on other sites More sharing options...
DaveH Posted May 27, 2022 Share Posted May 27, 2022 Very cool... Gold foils and all! 1 Quote Link to comment Share on other sites More sharing options...
django49 Posted May 29, 2022 Share Posted May 29, 2022 On 5/26/2022 at 8:38 PM, slingblader said: This was on my bench this evening. My Dad's 1961(ish) Harmony Rocket. I disassembled it as far as I could. I cleaned everything and gave it the first fretjob that it ever had... like it literally never had anything done at the factory aside from beveling the fret ends... and decades of playing cowboy chords pretty much decimated everything below the 5th fret. Restrung it with flats just like it had when he bought it. Plays and sounds great. Now that takes me back to when I was around 16...... 1 Quote Link to comment Share on other sites More sharing options...
slingblader Posted July 17, 2022 Author Share Posted July 17, 2022 I've started to build a 12 string bass as my next project. I've done a fair amount of research on the details, but there is a lot that can go wrong/be screwed up. So, I'm hoping this comes out well. I've been planning to do one of these ever since I started building (2016 or so), and I've been collecting some of the parts since that time. Here are the initial specs (subject to change of course) 34" neck through, multi-lam with a tapered core Dual truss rods Padauk and maple neck lams Cocobolo heart and sap fretboard Alder body core with claro walnut burl top and katalox back Assorted Gotoh tuners Sung Il bridge and tail piece(similar to the Hamer 12 bridge) Lace 3.5" bass bar pickups Aguilar OBP-3 preamp (maybe...) Here are a few pics of the progress to this point. Pile o' wood. Beginning to process the wood Claro walnut burl top with some denatured alcohol thrown on. That should be a killer top. Drum sanding some neck laminates. Never mind that peeling label on my drum sander.... that is a victim of the "great shellac spill of 2022"... let us never speak of it again. Neck lams getting closer to final size, hoping to glue up the neck beam later today. More soon. 8 Quote Link to comment Share on other sites More sharing options...
Travis Posted July 17, 2022 Share Posted July 17, 2022 Looking forward to seeing the progress on this one 1 Quote Link to comment Share on other sites More sharing options...
cmatthes Posted July 17, 2022 Share Posted July 17, 2022 This is SUPER cool! Great idea… 1 Quote Link to comment Share on other sites More sharing options...
topekatj Posted July 18, 2022 Share Posted July 18, 2022 Dang, dude, that neck scale looks longer than 34”. I’d need to capo at the 5th fret to play it. Better extend that top horn as you did on your other bass build! 1 Quote Link to comment Share on other sites More sharing options...
Steve Haynie Posted July 18, 2022 Share Posted July 18, 2022 4 hours ago, slingblader said: Never mind that peeling label on my drum sander.... that is a victim of the "great shellac spill of 2022"... let us never speak of it again. Tell us more! 1 Quote Link to comment Share on other sites More sharing options...
slingblader Posted July 18, 2022 Author Share Posted July 18, 2022 6 hours ago, Travis said: Looking forward to seeing the progress on this one Me too! I've been wanting to do this for years!!! 5 hours ago, cmatthes said: This is SUPER cool! Great idea… Thanks, Chris. Not sure if it's a great idea or not, but I've wanted one of these forever. I've never even held one, so hopefully I can make this thing playable. 1 Quote Link to comment Share on other sites More sharing options...
slingblader Posted July 18, 2022 Author Share Posted July 18, 2022 2 hours ago, topekatj said: Dang, dude, that neck scale looks longer than 34”. I’d need to capo at the 5th fret to play it. Better extend that top horn as you did on your other bass build! Well, it is a neck-through... so there's that... plus the headstock on a 12er is pretty dang gigantic! 1 Quote Link to comment Share on other sites More sharing options...
slingblader Posted July 18, 2022 Author Share Posted July 18, 2022 1 hour ago, Steve Haynie said: Tell us more! Oh man, a couple days before July 4th, I noticed something all over the top of my drum sander. I found that a can of Zinsser shellac (located in the cabinet above the sander) had sprung a leak and dripped about a pint or more of shellac over an extended period of time. It made a sticky shellac shell which had to be removed with denatured alcohol and acetone... which lead to the demise of the dust hood sticker on the sander. I used a lot of colorful language during that cleanup. 1 Quote Link to comment Share on other sites More sharing options...
slingblader Posted July 18, 2022 Author Share Posted July 18, 2022 Tonight I got the neck beam glued up. This is my clamping jig that I use for tapered neck beams. I use spacer blocks to hold my clamps, with riser blocks at each end to hold a pair of tapered cauls. And there it is after about a 40 minute glue-up process. 13 pieces in total (7 main lams, plus 6 black poplar veneers) That was a marathon! That assembly will sit for a few days before I do anything with it. I want to be sure it's good and dry before I start working on it. More soon. 7 Quote Link to comment Share on other sites More sharing options...
topekatj Posted July 18, 2022 Share Posted July 18, 2022 37 minutes ago, slingblader said: Well, it is a neck-through... so there's that... plus the headstock on a 12er is pretty dang gigantic! I want to see a 12 string bass with a Thunderbird style headstock. Quote Link to comment Share on other sites More sharing options...
slingblader Posted August 1, 2022 Author Share Posted August 1, 2022 Not a lot to report on progress of the 12 string bass. We had a severe storm come through last week which threw a big wrench in the plans. Anyway, here is what I've been up to. The neck glue-up came out great. I let the neck set for 4 or 5 days after coming out of the clamps. I cleaned up one side and used the drum sander to true up the opposite face. Then I flipped it over to hit the other side. Yesh, tight like tiger. Nice and square. Resawed a couple pieces of alder to use as body wing cores. Roughly tapered, slotted and radiused the heart and sap cocobolo fretboard. That's gonna look cool! I also have gotten a lot of measurements and calculations completed for upcoming steps. That stuff is boring and tedious, but it needs to be done. It should make next steps faster. More soon. 9 Quote Link to comment Share on other sites More sharing options...
specialk Posted August 1, 2022 Share Posted August 1, 2022 Love it! 4 Quote Link to comment Share on other sites More sharing options...
slingblader Posted August 4, 2022 Author Share Posted August 4, 2022 A little more progress to report. I cut the headstock angle from the blank and cleaned up the top face. Of course this will still need some wings attached. I'm still finalizing the headstock shape... having that many tuners limits the options a bit. This is the step that is always a little scary for me. Calculating the amount to route away to allow for the drop top, the neck angle, as well as a little extra "wing" angle. The wing angle accounts for the point (closest to the nut) at which the longest body wing meets the neck (usually on the bass side of the neck). This allows for a small angle that falls away toward the end of the fretboard. If you forget this, your drop top can end up covering part of the edge of the fretboard and you will need to do some creative carving to correct this. Ask me how I know. Normally, I can calculate the additional amount of "drop" needed at the scale line to accommodate the bridge height. (By the way, by "drop" I mean how much lower from the original "top" of the neck beam) But in this case, I'm not going to allow the full amount. The bridge is a full 19mm tall. I'd have a ridiculous amount of neck angle and the strings would be a mile off the body. So, this one will be a compromise. I'll account for a normal neck angle and then recess the bridge into the top of the body to arrive at what I hope is a happy medium. If anyone was able to follow that narrative, you deserve an award. OK, on with more pictures; which, in the end, are fairly boring. I perform this routing operation on my inverted pin router. So, I attach blocks to the rear of the neck beam. I set these so that I am not cutting into the final point at the end of the neck. I'll clean that up later by hand. You can see some guidelines that I've drawn on the side of the neck. These represent the end of the fretboard plane, the neck angle and the drop top thickness. I start with the drop top thickness. This is a straight route that removes the bulk of the waste and is around 5.5mm deep. Now, to accommodate the neck angle, I remove material from the "foot" that I left at the end of the beam. Here is the same shot, but now I'm pushing the neck beam down to the table on that shorter foot... Close up of the shorter foot... I have to hold this down firmly as I make my final pass. I leave the router depth set exactly the same for the next step. And there it is. You can now see that the material removed matches that angled line on the side of the neck. Side view Top view Now I can remove the foot completely, but I'll leave the excess at the end to help hold the top when I glue it. More soon. 6 Quote Link to comment Share on other sites More sharing options...
slingblader Posted August 5, 2022 Author Share Posted August 5, 2022 Tonight I glued up the wing sammiches. These are composed of alder, black dyed poplar, mahogany and katolox on the rear. I used UF glue for this operation and used the vacuum bag for clamping duties. I use tape to keep the bundles together until the vacuum can take over. The treble side wing will get the katalox plate later, after I've cut the control cavity cover from that laminate. More soon. 7 Quote Link to comment Share on other sites More sharing options...
slingblader Posted August 6, 2022 Author Share Posted August 6, 2022 I spent some time cleaning up the garage today. Things were getting a little messy out there, and someone noted that I may or may not have been dragging wood chips into the house. Next, I buckled down and finalized my headstock shape. I wanted to keep as many of the aspects of the original design as possible that I had used on my previous bass builds. Here's the one that I'm talking about. I had laid out the tuners and string paths previously sometime back in June, which was a major undertaking. The problem that I ran into was that I couldn't keep the "wing" curves in the same orientation as the original because of the way I had laid out the tuners. So, here is what I came up with. I pretty much just reversed the design on the treble side of the headstock. It's growing on me and I think that it will work. (Apparently, I thought that today was August 8...) I cut the templates from hardboard at the band saw, then cleaned them up with files. Here are both templates stacked up. Still need a little tweaking, but you get the idea. And here it is next the the one used on the 5 string. Obviously the 12er headstock is yuuuge, but I feel like it is in keeping with the aesthetic. Thoughts? 10 Quote Link to comment Share on other sites More sharing options...
cmatthes Posted August 6, 2022 Share Posted August 6, 2022 I really dig it! 2 Quote Link to comment Share on other sites More sharing options...
slingblader Posted August 6, 2022 Author Share Posted August 6, 2022 8 minutes ago, cmatthes said: I really dig it! Thanks, Chris! 1 Quote Link to comment Share on other sites More sharing options...
hamerhead Posted August 6, 2022 Share Posted August 6, 2022 That looks great. Managing to keep it small (relatively speaking) with all that's going on is impressive as hell. Can't wait to see the end product. 1 Quote Link to comment Share on other sites More sharing options...
slingblader Posted August 6, 2022 Author Share Posted August 6, 2022 8 hours ago, hamerhead said: That looks great. Managing to keep it small (relatively speaking) with all that's going on is impressive as hell. Can't wait to see the end product. Thank you, sir! Quote Link to comment Share on other sites More sharing options...
slingblader Posted August 6, 2022 Author Share Posted August 6, 2022 Time for (headstock) wings. Got all pieces prepped, glue mixed and neck in position. Gluing in progress. Clamping. And more clamps. I had to straighten up that clamp on the end after I took this picture. I couldn't take it. 4 2 Quote Link to comment Share on other sites More sharing options...
slingblader Posted August 8, 2022 Author Share Posted August 8, 2022 I didn't get much accomplished today that "shows" on the bass. But, here's what I was up to. I got the headstock face cleaned up after gluing the wings. I planed it back to right around where the nut will be placed. After the veneers have been glued, they will get flushed down to the fretboard plane and the nut will sit on top of the veneer. Next I glued up some black poplar and walnut veneer that I had prepped earlier. The entire neck went into the bag to clamp the headstock veneers. While operating the leg vise on my bench today, I noticed that it was squeaking and not operating as smoothly as it should. So, I spent a little time cleaning and lubricating the acme screw. Works like a champ again. 4 Quote Link to comment Share on other sites More sharing options...
slingblader Posted August 16, 2022 Author Share Posted August 16, 2022 Haven't updated this in a while, but I've gotten a few things done. After the headstock overlay had dried for a couple of days, I thinned down the headstock at the band saw. I trimmed the headstock very closely to the template, then routed it with a pattern bit. After the routing operation, I cleaned up the inside corners with chisels and files. The wood block on the back of the headstock was to hold everything square while cutting at the band saw and drilling the pilot holes for the tuners. I finalized the position for the fretboard, then trimmed up the "ledge" with chisels. I cut recesses for truss rod adjustments and drilled through holes into the end heel end of the neck. I made a new control cavity template with only 1 battery compartment and also deleted a couple of extraneous screw locations. I routed the control cavity using a 1/2" bit, then chased it with a 1/4" bit to get into the corners. I laid out the access cover on the rear plate, then cut it out on the scroll saw. More soon. 5 Quote Link to comment Share on other sites More sharing options...
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