Here it is... I opened one up for a local shop. A guy had his painted (!!!) and the painter hacked his wiring up, shoved it into the control cavity and gave it back to him. Duh, my guitar doesn't work. So the lack of available schematics etc. made this one a little more than your average rewire. The little board on the back of the varitone pot has all the connections labeled though, so tada, here it is kinda half wiring half schematic.
right click on the image for full view:
I recently had the pleasure of repairing the preamp on a 1977 Ovation Country Artist 1624-4. The primary complaint was that the guitar did not work when plugged in. To make a long story short, after audio probing through the circuit, I first determined the electrolytic caps were dead, followed by determination that the JFET was dead as well. After replacing the electros (C3 & C4) and tranny (didn't have a 2N5459 handy, but used a 2N5458 with great results), it sounded very nice.
I am the proud owner of what is called a cowpoke bass. This is a bit of an odd Fender bass having 22 frets and an active preamp. It has been produced in Mexico for only about two years (94/95). Some belive the preamp was designed by Mr. Kubicki as this was the time Fender had a collaboration with him. Other say it was designed by Fender themselve. This thread over at talkbass is about the best source of information for those basses.
Well, mine did show a problem with the output signal being...
Hi folks
First thanks to pf_fan for his encouragement and pictures, and a special thanks to the nice person on the EMG forum for providing some nice hi-res pictures of an SPC and EXG circuit board.
Now to the nitty gritty :wink:
EMG produce a range of active tone controls, but the most popular configuration is that used by david gilmour in his red strat - the DG20.
The most recent version is completely solderless with push on connectors and all the componentry is hidden between the rear of the...
Very recently, I learned that Ibanez have apparently had a preamp in their basses which had a variable filter, called Power Curve. In the 80's-90's SR series basses, apparently.
I am wondering if this is similar to what Alembic has for their filter preamps, or something else.
Does anyone know more? Does anyone have a schematic for this preamp?
Keen to learn more about this.
Hi. Wiring up my pups in series with a on/off/on switch (like vintage duosonic). Have found a toggle switch that might do the job but am noticing a symbol beside the center lug that I do not recognise.
Here's a pdf book containing three version of Ormond Sparks articles on electric guitars as published in Practical Mechanics in 1937. The article was reworked in 1943 and then republished in 1953...
So a while back I picked up an Ibanez Gio GSR200 bass off of craigslist for cheap, and though it sounded kinda like crap with everything on it stock, I got infatuated with the onboard preamp it came with, especially after opening it up and seeing that it was a relatively simple circuit. Well, I've been working on tracing it for a while, and after a good amount of trial and error, I finally built a working copy and drawn up a schematic. The circuit is compact and fits comfortably in...
I've had this bass in for nasty buzz and hum that got even worse after someone else's attempt... Wires were very thin and brittle, shielding paint was somehow inefficient. So I went rewiring it all and properly shielding it. It is dead quiet now, and plays really well. I did change some of the stock caps (on the preamp and tone control) for better quality ones (these were like the plastic transparent ones found in many Boss pedals). I do like the active preamp, it's a nice feature on this...
I'm looking for an installation manual and/or schematics for an early version of the Fernandes Sustainer circuit. I bought a guitar from the early 90s, the Sustainer works, but the wiring is a complete mess and the lever switch is broken. The circuit has only two trimpots and no coil on the pcb. The driver pickup isn't rounded like the new version, yet. Must be a very early version of the 401 circuit.
I found an interesting phenomenon in a guitar I rewired recently. The cavity is shielded extensively with copper foil, but I was still getting a hum that seemed much louder than it should have been. I knew the problem was likely because of long wires: this is temp install of a new pickup to test it out - it goes into a different guitar later - so I left the leads long. What I had done was stuff the excess wire underneath the pickup. I had hoped that since it has copper everywhere, it would have...
Hello
I want to include a high pass filter in my les paul, i think it will be a usable tone, kind of giving it more of a strat tone.
All the schematics i've seen from high pass filters include a resistor to ground after the capacitor, like this:
On the other hand, on the wiring schematics (from guitar related sites) like the reverend schematic they only use a resistor to blend the capacitor in the circuit, they don't include a resistor to ground after the capacitor.
I have a MEC / WARWICK 3 band bass on board eq and it has an issue. when i plug in my bass guitar the active system has a lot of noise and RF interference. the signal sounds weak when compared to the passive sound? I replaced the battery and i do not see any wires disconnected from the circuit. Any help on this would be appreciated.
Anybody have a schematic for the booster circuit found in 80s BC Rich guitars and basses or maybe someone has a BC Rich that can post some pics? Need to build one to replace the missing circuit in my 80s Fernandes Eagle copy.
does anybody have the baja schematic for active pickups??, id would like to try it but i have seen many different sch everywhere, so im looking for it in here, if BAJA can tell me will be amazing, looking for the EMG81, also if anybody have the LM4250 on smd eagle library its welcome too
I have a tele style I'm building... HSS nashville style with a humbucker bridge. I've got two concentric pots, cts 500k/250k. I can use a 3 way blade or a 5 way blade. I'm thinkin'... master vol / neck tone and mid pup blender / bridge tone with a 3 way controlling the neck and bridge pups. :blackeye I'd love to have the single coils on one pot and the humbucker on the other but the switching has me stumped without purchasing a new superswitch... I'm using a stock tele control plate. Anybody...
Right off the bat, I'm certainly not condoning fake name brand guitars nor am I suggesting you misrepresent the origin of your gear. As you will see, these labels are 100% honest, clearly worded and for anything other than a quick glance will fool no one. That said I want to share how, using no special materials, to add these novelty logos to your guitar headstock and make it look like a factory job.
The two logos use different techniques, first the F brand .....
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