Showing posts with label ctspots. Show all posts
Showing posts with label ctspots. Show all posts

Thursday, September 03, 2020

2010 American Special Stratocaster® | Part 3

1 | 2 | Part 3 | 4 | 5 | 6

Electronics Work


This post mainly highlights what was done to this American Special Stratocaster® electronics-wise . We'll start off with the owner's specific request that (i) the brass base/grounding plates be removed, (ii) the pickups be rewired with Gavitt wire; and (iii) the pots, switch, jack and hardware beyond saving be replaced.

And so out went the old electronics, and in went 100% Gavitt wiring, new CRL five-way switch, CTS 250K pots, 0.022uF tone cap, Switchcraft #11 jack socket, pickup tubing, miscellaneous screws; and a set of vintage-style bent steel saddles. Besides all this, the owner, desiring a "fresh new look," had me replace the stock off-white pickup covers, knobs; and switch tip with black ones.













Thursday, July 09, 2020

Yamaha ERG121C Makeover: Part One

Related Posts
Part One | Part Two | Part Three

What do we have here? It's a used Yamaha ERG121C HSH rock machine in ... wait for it ... shocking pink. I assume the previous owner was responsible for the paint job, and also some nice upgrades. He'd put in a trio of Seymour Duncans: SH-2N Jazz Model (neck), APS-1 Alnico Pro II (middle), and SH-4 JB Model (bridge). 

He'd also wired in a CRL 5-way switch, CTS 500K pots, and Switchcraft #11 jack socket. The bee's knees, I'd say. Only problem was that the wiring was a little suspect, and the ERG121C wasn't "sounding as it should" (current owner's words, not mine).

And so, besides requesting a complete rewiring job, the current owner would like to have the body stripped down to bare wood and refinished natural. Okey dokey, it's another heat gun and scraper job for me. Underneath the pink was black (the original color, I guess), a silver undercoat, thick layer of sealer; and some kind of veneer. I sanded the body down to bare wood and was pleased to discover that it was a solid 3-piece job; not plywood or something similarly distasteful. 

The next step was filling the grain with good ole' Elmer's Carpenter's Natural Wood Filler. Left it to dry overnight, and sanded off the excess the next day. Then it was time to stain the body with StewMac ColorTone Liquid Stain (#5030 - Vintage Amber). Once the stain had set, it was time to settle any woodwork before proceeding with refinishing.

Stock, the ERG121C features two ring-mounted humbuckers and a direct-mounted single coil. However, the previous owner had done away with the rings and direct-mounted the SH-2N and  SH-4 using wood screws that were too short and of all things; Strat pickup rubber tubing instead of springs or foam inserts. As you can guess, the humbuckers' height could not be adjusted.

To solve this issue, I first plugged the pickup height screw cavities with slightly over-tall glued-in wooden blocks. After the glue had dried, I pared down these wooden plugs until they were level with the cavity bottom. Following this, I reattached the neck, put the humbuckers in their respective routs, and strung up the high and low E strings. 

This was just a mock-up that helped me to align the polepieces and strings. The SH-2 lined up okay, but the SH-4 was a "little" off (to put it kindly). Someone should have told the poor guy that he needed a TB-4 JB Model Trembucker, and not an SH-4 (standard spacing) for correct string-polepiece alignment at the bridge.

Resigning myself to the fact that there was no budget for a new bridge humbucker, I proceeded to drill pilot holes for the new pickup height screws (shortened P-bass pickup height screws) and did a test run with Strat conical pickup springs in place. All went well, thankfully, and I sealed the deal by gluing small metal washers around each screw hole. These washers will help to keep the screws from wandering around when it's finally time to reinstall the pickups.

I'm now in the middle of refinishing the body in Tru-Oil. Stay tuned for later updates. See you soon :)














Sunday, May 07, 2017

1992 Jackson Professional Series Dinky LT

I dare say that we are looking at a Jackson Professional Series Dinky LT, judging from the "Jackson Professional" script on the headstock and "DK-LT" stamp in the neck pocket. This Dinky sports a comfortable downsized strat-styled body with a gorgeous flame maple front/back and "full cut" neck heel (which should enhance high note access). Pickup configuration is HSS, with the only stock pickup being the middle single coil; presumably. The tuners are 6-in-line Jacksons, and the back of the headstock sports a holder for two Allen wrenches. Nice touch, eh?

The bolt-on maple neck features a 25.5" scale bound rosewood fingerboard with 22 jumbo frets, black side dot markers and pearloid sharkfin inlays. The tremolo appears to be a JT-590, which is a "Floyd Rose licensed double locking tremolo precision crafted in Germany" by Schaller. Last but not least, the control cavity sports an Oak Grigsby 5-way switch and CTS pots for master volume, neck tone, and middle tone. Each tone pot has its own 0.022uF cap. Judging by the components, one can safely conclude that this was an attempt by a previous owner to upgrade his/her beloved axe.   

The serial number (911468) on the neck plate of this guitar suggests that it was manufactured in 1991. However, one cannot ignore two facts. The first is that the earliest appearance of the Jackson Dinky was in the 1992 Jackson/Charvel Catalog. I did check out the Charvette/Charvel/Jackson 1990-91 Catalog just to be sure, but there was no Dinky to be seen. The second lies in the research of Hjortnaes (2006), which indicates that production of the Jackson Dinky LT only commenced in 1992. All things considered, one could deduce that the neck plate on this particular guitar could have been unused stock from 1991. The owner, on the other hand, insists that his guitar is a 1991 model. To each his own, I guess.

The guitar came to me in a totally unplayable condition, due to a number of issues which needed to be addressed with haste. The first was the fingerboard, which had come totally unglued at the headstock end. After carefully removing debris and old glue residue, I dry-fitted the surfaces to be glued and determined the best position for my F-clamps. Having done this, Titebond III glue was liberally applied to both surfaces, and the joint clamped. Excess glue squeeze-out was quickly wiped away with damp paper towels. After 24 hours, the clamps were removed, and the affected areas sanded smooth with successively finer grits of sandpaper.

The second issue was that the thin layer of rosewood beneath the locking nut had cracked and fallen off in two shards, exposing the truss rod channel's metal cover. I did not think that this would adversely affect neck stability as the area would be firmly clamped by the locking nut anyway. But it didn't feel right to just leave it like that. So I got out the Titebond III once again, gingerly repositioned the rosewood shards, and used a mini C-clamp with a plexiglass caul to keep things in place for 24 hours. Once the clamp and caul were removed, the repaired area was lightly sanded to even things out.

Next was the JT-590, which was so caked in rust and unidentifiable gunk that intonation adjustment was impossible. Time for treatment with hazardous chemicals, I'd say. Much to my relief, the treatment worked and I was able to deconstruct the troublesome trem. Next came a thorough going-over with a brass-bristled brush and sandpaper, plus a generous helping of WD-40. You can imagine my huge sigh of relief when the trem was finally reassembled and determined to be functioning as it should.

Following this was the poor condition of the 22 jumbo frets and fingerboard. Now, while I'm used to seing divots, low spots and flattened frets confined to the "cowboy chords" region of the fingerboard; this one had them all over the place. As there was still enough height left in the frets, a refret was not necessary. Time for a fret dress, then. So, out came the marker pen, masking tape, sanding beams, crowning files, sandpaper; and 0000 steel wool. Hmmm .... just remembered that I never bothered to measure the fingerboard radius. If I'd used a radius block, I would've had to measure the radius beforehand. Sheesh ... now I'll never know.  

The final issue was the absolutely gnarly condition of the maple neck. It was covered in a motley mixture of crud and paint, making playing a truly out-of-this world experience; but not in a good way. And so a-sandpapering and steel-wooling did we go. Took me a couple of days to de-gunk the neck, but what I discovered beneath blew me away. True, fungus had eaten into the wood and turned it permanently gray, but I could not ignore the presence of birds' eyes and tigerish-looking stripes. Aha, time for some good ole' Tru-Oil. The Tru-Oil made the eyes and stripes really pop, imbued the dull gray neck with an appealing amber hue; and imparted a slick feel very unlike a poly or lacquer finish. Do give Tru-Oil a shot the next time you're refinishing a maple neck, I think you'll fall in love as I have.

Besides tackling the aforementioned issues, I also cleaned and reconditioned the rosewood fingerboard with 0000 steel wool, a toothbrush and lemon oil. Did a thorough electronics check too, and found that the second tone pot was a tad wobbly. This is what happens when you force 18-spline knobs onto 24-spline pot shafts. The pot casing had actually come loose and you could push the knob and shaft into the body. Luckily, as no permanent damage had been done to the resistive track, it was just a matter of bending the pot casing's four tabs back into place.

Last of all was slapping on a new set of Darco 009s, tuning to pitch, adjusting neck relief,  and setting up the JT-590 to float; which took me the better part of an afternoon. Ah, the joys of having a floating trem, I hear you say. Not for me, I'm afraid. I'll take a rock-solid hardtail over locking nuts and fine tuners any day. But you've gotta give the customers what they want, no?



























Monday, July 28, 2014

2007 Left-Handed American Standard Precision Bass

This blog entry features a left-handed black 2007 American Standard Precision Bass that came in for a string change (DR Dragon Skin) and setup. Besides this, the owner also requested that the stock Custom Shop '60s Split Single-Coil Precision Bass pickup be replaced with a Seymour Duncan SPB-4 Steve Harris

Features that caught my eye were the ultra-smooth and precise Fender "F" Light-Weight Vintage-Paddle Keys with Tapered Shafts (tuning machines), the 4-Saddle High-Mass Vintage String-Through-Body Bridge (adjustable string spacing), and solid shaft CTS pots. On the other hand, I was rather disappointed to see that the 0.05uF tone cap was ceramic.



Full front and rear view.

Headstock front and back.

String ferrules for through-body stringing.



Closer view of the "4-Saddle High-Mass Vintage String-Through-Body" bridge. Note that the saddles for the G and D strings have 4 grooves, and those for the A and E, three. This feature enables adjustable string spacing.





Clockwise from top left: pickguard sticker, volume control knob removed to reveal solid pot shaft, truss rod adjustment hex nut at neck heel, and pickguard assembly date sticker.




Underside of pickguard shielded with aluminium foil, and control cavity with shielding paint. Note ground lug to the left of the barcode sticker.


Closer view of the electronics.

Good to go.