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Acoustic Electric Bass

mapleglo

Warp Engineer
Supporting Member
Sep 7, 2013
13,346
47,609
phoenix, az
So as I save a little more money for my 4001-ish build, I thought I'd start another to keep me busy. I'm trying to do this one with a low budget.

I have this old Ovation Matrix acoustic guitar which I bought back in the 70's.

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And I bought one of those G&L necks for like $35 or so.

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It's a pretty nice neck, though it's in desperate need of fretwork. The fret edges stick out quite far, so I can get some practice dressing them in preparation for my 4001 build.

So first, I took apart the Ovation.

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Then I cut out a piece of plywood to match the face.

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I laid the guitar body face down, space it off the surface with a few pieces of 2x4, and covered it with plastic.

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I stapled the plastic in place. Then I covered it with some stretchy fabric I bought yesterday, and stapled that in place.

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Then I mixed up some fiberglass resin, and brushed it on the cloth.

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And That's where I am now, waiting for it to cure. Once done, I'll cover it with the remaining fabric, and apply another coat. I've seen this technique used for making car panels in a car stereo install shop, and the resulting panels are pretty rigid. I think it should be tough enough for the back of the bass.

I'm thinking of using one pickup that remained from my Leaf build, and I have some tuners sitting around that I originally bought for the Reformer build, but didn't use. The only real hardware I'll have to buy is a bridge, unless I use the Fender one I swapped out on my Precision for the Babicz.

I'll use a piece of maple to mount the bridge and neck to, which will span the length of the body, and glue up some thinner wings, and fiberglass that into the "bowl". I have no idea how loud it will be, and I'm not too concerned about it. I'm using this as an experiment in acoustic bass building.
 
Put on the second coat, only I made the resin mix a little too hot, so it started gelling about half way through. I should be ok though. I'll just have to sand it down a bit, and recover it with the resin.

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Dang Maple, you are on a creative roll! I've done a little fiberglass work, and that stuff is nasty all around. Hope you are well ventilated, gloved, the works. I think I've seen black fiberglass fabric, but it's probably a lot more expensive.
 
Yeah, fiberglass resin stinks, and it can be quite overpowering. I did the work outside, and I still had to step back from it occasionally. I probably should have worn the respirator. I think it's worse than nitro.
 
Yeah, fiberglass resin stinks, and it can be quite overpowering. I did the work outside, and I still had to step back from it occasionally. I probably should have worn the respirator. I think it's worse than nitro.

Call me crazy, but I love the smell of nitro. I absolutely hate sanding fiberglass resin. This looks like a very interesting and cool project, but better you than me :D
 
Thanks. I also find the smell of nitro pleasing, but it can also be overwhelming. And I agree about sanding the resin. The dust is so fine, and it gets everywhere.

That said, I separated the body from the mold today.

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It's not quite as rigid as I had hoped, so I'm thinking of putting in a couple of plywood cross members, and perhaps another layer of material. For those I may use actual fiberglass cloth for strength. It's still pretty light, so I think I'm good on weight.

Note to self - mark a straight line on the inside for the final cut using the original body as a straight line around the inside perimeter.

Funny thing, I've found about 5 guitar picks that fell inside the body over the years that I could never seem to get out. A few of them must be 30 years old. One was stuck under the Ovation sticker.
 
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When you get the braced top attached, the body will stiffen up nicely. What are your plans for attaching the neck?

I'm thinking this will be basically a solid body bass guitar with a big sound hole cut somewhere, that has a big hollow back. I realize that may reduce the sound output, but I'm just looking for a bass that I can practice with unplugged, and perhaps for an instrument that will look "right" if I ever join an acoustic band again. From what I hear, most acoustic bass guitars aren't loud enough to play unplugged with acoustic guitars anyway, so I'm not too concerned about the volume, or lack thereof. So the neck will attach the same way as a normal solid body. I'll have to do that before I glue in the top, and use plenty of locktite - there's no access after it's together, unless I can get to it through the sound hole.

How thick is the back now? All of the sub boxes I've made that were odd compound curves were around 3/16" thick and were light and incredibly stiff. Put a layer of thick mat on the inside and it should stiffen quite nicely.

Yeah, I'm thinking Hopkins is right. Once I put on the top, it will stiffen back up. It's just under 3/16" now.
 
I was really spooked for a minute there - I thought you were going to permanently mummify that nice old Ovation body!

Whew! Must be the imminent Halloween creeping out...

Cool stuff!

"The Cask of Ovation" By Edgar Allen Mapleglo?

Stupid jokes aside, subbed. This is definitely an interesting concept.

Thanks! I like the Edgar Allen Mapleglo :P

And for what it's worth, the ovation body is from an old, entry level guitar. The finish has major cracks in it, and the frets have heavy wear, though the guitar is still playable - barely. The neck on those old Ovation Matrix's were cast in aluminum, including the frets. So I don't believe it feasible to even do any fret work. They can't be replaced easily. I'd have to sand them down completely, somehow cut fret slots (in a radiused aluminum fret board), and put in new ones. All on a guitar that cost probably under $200 in the late 70's.

It does have some sentimental value to me - it's the oldest instrument I own and I bought it new. We've been through a lot together.
 
So today I fitted what I'm calling an "undertop" to the shell. I cracked the shell during the process, so I patched it.

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Then I placed a strip of fiberglass cloth inside to secure the "undertop" to the shell. I'll have to do this in steps because I'm kind of working with gravity.

I'm remembering a few things about working with fiberglass, aside from the fact it smells. The resin gets everywhere. Even though I wore gloves, it still gets on my fingers. Last time, a few clumps of it got on my work bench, so I had to sand that flat this morning. The cloth is "stick-y". I always feel like I have little shards of it on my hands and arms. That might be psychological. I'm remembering the ratio of hardener to resin for a good mix. And you can never have enough cheap brushes.

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Once this step is completed, I may lay on another coat of the black cloth to the back, to help cover the repair.
 
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"The Cask of Ovation" By Edgar Allen Mapleglo?

Mockingjay Literature presents:

THE CAST OF OVATION

by Edgar Allan Mapleglo
(2014)

THE thousand injuries of Rickenbacker I had borne as I best could, but when he ventured upon insult I vowed revenge. You, who so well know the nature of my soul, will not suppose, however, that gave utterance to a threat. At length I would be avenged; this was a point definitely, settled --but the very definitiveness with which it was resolved precluded the idea of risk. I must not only punish but punish with impunity. A wrong is unredressed when retribution overtakes its redresser. It is equally unredressed when the avenger fails to make himself felt as such to him who has done the wrong.

It must be understood that neither by word nor deed had I given Rickenbacker cause to doubt my good will. I continued, as was my in to smile in his face, and he did not perceive that my to smile now was at the thought of his immolation.

He had a weak point --this Rickenbacker --although in other regards he was a man to be respected and even feared. He prided himself on his connoisseurship in instruments. Few Germans have the true virtuoso spirit. For the most part their enthusiasm is adopted to suit the time and opportunity, to practise imposture upon the British and Austrian millionaires. In painting and gemmary, Rickenbacker, like his countrymen, was a quack, but in the matter of instruments he was sincere. In this respect I did not differ from him materially; --I was skilful in the solid bodies myself, and bought largely whenever I could.

It was about dusk, one evening during the supreme madness of the carnival season, that I encountered my friend. He accosted me with excessive warmth, for he had been drinking much. The man wore motley. He had on a tight-fitting parti-striped dress, and his head was surmounted by the conical cap and bells. I was so pleased to see him that I thought I should never have done wringing his hand.

I said to him --"My dear Rickenbacker, you are luckily met. How remarkably well you are looking to-day. But I have received a guitar of what passes for Ovation, and I have my doubts."

"How?" said he. "Ovation, a guitar? Impossible! And in the middle of the carnival!"

"I have my doubts," I replied; "and I was silly enough to pay the full Ovation price without consulting you in the matter. You were not to be found, and I was fearful of losing a bargain."

"Ovation!"

"I have my doubts."

"Ovation!"

"And I must satisfy them."

"Ovation!"

"As you are engaged, I am on my way to Fender. If any one has a critical turn it is he. He will tell me --"

"Fender cannot tell Ovation from Washburn."

"And yet some fools will have it that his taste is a match for your own.

"Come, let us go."

"Whither?"

"To your workshop."

"My friend, no; I will not impose upon your good nature. I perceive you have an engagement. Fender--"

"I have no engagement; --come."

"My friend, no. It is not the engagement, but the severe cold with which I perceive you are afflicted. The workshop is insufferably humid. It is encrusted with nitre."

"Let us go, nevertheless. The cold is merely nothing. Ovation! You have been imposed upon. And as for Fender, he cannot distinguish Washburn from Ovation."

Thus speaking, Rickenbacker possessed himself of my arm; and putting on a mask of black silk and drawing a roquelaire closely about my person, I suffered him to hurry me to my palazzo.

There were no attendants at home; they had absconded to make merry in honour of the time. I had told them that I should not return until the morning, and had given them explicit orders not to stir from the house. These orders were sufficient, I well knew, to insure their immediate disappearance, one and all, as soon as my back was turned.

I took from their sconces two flambeaux, and giving one to Rickenbacker, bowed him through several suites of rooms to the archway that led into the vaults. I passed down a long and winding staircase, requesting him to be cautious as he followed. We came at length to the foot of the descent, and stood together upon the damp ground of the workshops of the Luthiers.

The gait of my friend was unsteady, and the bells upon his cap jingled as he strode.

"The guitar," he said.

"It is farther on," said I; "but observe the white web-work which gleams from these cavern walls."

He turned towards me, and looked into my eves with two filmy orbs that distilled the rheum of intoxication.

"Nitre?" he asked, at length.

"Nitre," I replied. "How long have you had that cough?"

"Ugh! ugh! ugh! --ugh! ugh! ugh! --ugh! ugh! ugh! --ugh! ugh! ugh! --ugh! ugh! ugh!"

My poor friend found it impossible to reply for many minutes.

"It is nothing," he said, at last.

"Come," I said, with decision, "we will go back; your health is precious. You are rich, respected, admired, beloved; you are happy, as once I was. You are a man to be missed. For me it is no matter. We will go back; you will be ill, and I cannot be responsible. Besides, there is Fender --"

"Enough," he said; "the cough's a mere nothing; it will not kill me. I shall not die of a cough."

"True --true," I replied; "and, indeed, I had no intention of alarming you unnecessarily --but you should use all proper caution. A draught of this Jack Daniels will defend us from the damps.

Here I opened a bottle which I kept within my coat.

"Drink," I said, presenting him the whiskey

He raised it to his lips with a leer. He paused and nodded to me familiarly, while his bells jingled.

"I drink," he said, "to the buried instruments that repose around us."

"And I to your long life."

He again took my arm, and we proceeded.

"This workshop," he said, "is extensive."

"The Luthiers," I replied, "were a great and numerous family."

"I forget your arms."

"A huge human foot d'or, in a field azure; the foot jigsaws a serpent rampant whose fangs are imbedded in the heel."

"And the motto?"

"Rhoncus instrumenta facta silex !"

"Good!" he said.

The whiskey sparkled in his eyes and the bells jingled. My own fancy grew warm with the Jack. We had passed through long walls of piled instrument skeletons, with necks and hand wound pickups intermingling, into the inmost recesses of the workshop. I paused again, and this time I made bold to seize Rickenbacker by an arm above the elbow.

"The nitre!" I said; "see, it increases. It hangs like moss upon the vaults. We are below the river's bed. The drops of moisture trickle among the bones. Come, we will go back ere it is too late. Your cough --"

"It is nothing," he said; "let us go on. But first, another draught of the Jack."

I handed him the bottle. He emptied it at a breath. His eyes flashed with a fierce light. He laughed and threw the bottle upwards with a gesticulation I did not understand.

I looked at him in surprise. He repeated the movement --a grotesque one.

"You do not comprehend?" he said.

"Not I," I replied.

"Then you are not of the brotherhood."

"How?"

"You are not of the masons."

"Yes, yes," I said; "yes, yes."

"You? Impossible! A mason?"

"A mason," I replied.

"A sign," he said, "a sign."

"It is this," I answered, producing from beneath the folds of my roquelaire a trowel.

"You jest," he exclaimed, recoiling a few paces. "But let us proceed to the Ovation."

"Be it so," I said, replacing the tool beneath the cloak and again offering him my arm. He leaned upon it heavily. We continued our route in search of the Ovation. We passed through a range of low arches, descended, passed on, and descending again, arrived at a deep crypt, in which the foulness of the air caused our flambeaux rather to glow than flame.

At the most remote end of the crypt there appeared another less spacious. Its walls had been lined with instrument remains, piled to the vault overhead, in the fashion of the great workshops of Phoenix. Three sides of this interior crypt were still ornamented in this manner. From the fourth side the bones had been thrown down, and lay promiscuously upon the earth, forming at one point a mound of some size. Within the wall thus exposed by the displacing of the bones, we perceived a still interior crypt or recess, in depth about four feet, in width three, in height six or seven. It seemed to have been constructed for no especial use within itself, but formed merely the interval between two of the colossal supports of the roof of the catacombs, and was backed by one of their circumscribing walls of solid granite.

It was in vain that Rickenbacker, uplifting his dull torch, endeavoured to pry into the depth of the recess. Its termination the feeble light did not enable us to see.

"Proceed," I said; "herein is the Ovation. As for Fender --"

"He is an ignoramus," interrupted my friend, as he stepped unsteadily forward, while I followed immediately at his heels. In niche, and finding an instant he had reached the extremity of the niche, and finding his progress arrested by the rock, stood stupidly bewildered. A moment more and I had fettered him to the granite. In its surface were two iron staples, distant from each other about two feet, horizontally. From one of these depended a short chain, from the other a padlock. Throwing the links about his waist, it was but the work of a few seconds to secure it. He was too much astounded to resist. Withdrawing the key I stepped back from the recess.

"Pass your hand," I said, "over the wall; you cannot help feeling the nitre. Indeed, it is very damp. Once more let me implore you to return. No? Then I must positively leave you. But I must first render you all the little attentions in my power."

"The Ovation!" ejaculated my friend, not yet recovered from his astonishment.

"True," I replied; "the Ovation."

As I said these words I busied myself among the pile of guitar bones of which I have before spoken. Throwing them aside, I soon uncovered a quantity of cloth and fiberglass resin. With these materials and with the aid of my trowel, I began vigorously to wall up the entrance of the niche.

I had scarcely laid the first tier of the fiberglass when I discovered that the intoxication of Rickenbacker had in a great measure worn off. The earliest indication I had of this was a low moaning cry from the depth of the recess. It was not the cry of a drunken man. There was then a long and obstinate silence. I laid the second tier, and the third, and the fourth; and then I heard the furious vibrations of the chain. The noise lasted for several minutes, during which, that I might hearken to it with the more satisfaction, I ceased my labours and sat down upon the bones. When at last the clanking subsided, I resumed the trowel, and finished without interruption the fifth, the sixth, and the seventh tier. The wall was now nearly upon a level with my breast. I again paused, and holding the flambeaux over the mason-work, threw a few feeble rays upon the figure within.

A succession of loud and shrill screams, bursting suddenly from the throat of the chained form, seemed to thrust me violently back. For a brief moment I hesitated, I trembled. Unsheathing my rapier, I began to grope with it about the recess; but the thought of an instant reassured me. I placed my hand upon the solid fabric of the workshop, and felt satisfied. I reapproached the wall; I replied to the yells of him who clamoured. I re-echoed, I aided, I surpassed them in volume and in strength. I did this, and the clamourer grew still.

It was now midnight, and my task was drawing to a close. I had completed the eighth, the ninth and the tenth tier. I had finished a portion of the last and the eleventh; there remained but a single sheet of cloth to be fitted and resined in. I struggled with its weight; I placed it partially in its destined position. But now there came from out the niche a low laugh that erected the hairs upon my head. It was succeeded by a sad voice, which I had difficulty in recognizing as that of the noble Rickenbacker. The voice said—

"Ha! ha! ha! --he! he! he! --a very good joke, indeed --an excellent jest. We will have many a rich laugh about it at the palazzo --he! he! he! --over our guitar --he! he! he!"

"The Ovation!" I said.

"He! he! he! --he! he! he! --yes, the Ovation. But is it not getting late? Will not they be awaiting us at the palazzo, the Lady Rickenbacker and the rest? Let us be gone."

"Yes," I said, "let us be gone."

"For the love of God, Mapleglo!"

"Yes," I said, "for the love of God!"

But to these words I hearkened in vain for a reply. I grew impatient. I called aloud --

"Rickenbacker!"

No answer. I called again --

"Rickenbacker!"

No answer still. I thrust a torch through the remaining aperture and let it fall within. There came forth in return only a jingling of the bells. My heart grew sick; it was the dampness of the workshop that made it so. I hastened to make an end of my labour. I forced the last bit of fiberglass into its position; I plastered it up. Against the new shell I re-erected the old rampart of bones. For the half of a century no mortal has disturbed them. In pace requiescat!
 
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