Any schematics around for an onboard mid booster like Emg's?

[Chris Goodson]

I was looking at David Gilmores guitar's internal setup in an old issue of Guitar Shop today.  He uses EMG's SPC mid booster and the EXG mid cut/expander.  I've recently put a Stratoblaster in my guitar and really like it so far, but I thought some sort of active tone control might be cool.  Are there any schematics around for stuff like this that might fit in the guitar cavity?

[Ben N]

I think Aron has a couple of variants of the Fender Eric Clapton Strat circuit, which includes a buffer/preamp and a variable mid-boost.  It is not as compact as the EMG, IIRC, but definitely along the same lines.  Also, so a search for Craig Anderton's mid-boost, the basic schematic for which is floating around (and also found in one of his books).  
Hope this helps.
Ben

[BD13UK]

There were a couple of schematics relating to mid boosts etc at the Blue Guitar page, I believe the Clapton one was also there

[cd]

If you use small caps and 1/8W resistors, you can fit the EC Strat circuit in 2 square inches of stripboard.  I have a homemade one in my Strat, tone is good but it's noisy.

[Ben N]

CD:
Hey, I'm curious about the details--how'd you mount it?  Did youi have to rout at all?  Where'd you put the battery(ies)?  Did you do the original circuit, or the op-amp variant?  Got pix?
Ben

[cd]

CD:
Hey, I'm curious about the details--how'd you mount it?  Did youi have to rout at all?  Where'd you put the battery(ies)?  Did you do the original circuit, or the op-amp variant?  Got pix?
Ben

The fit was still tight, so to "mount" it all I did was to stuff it in a plastic bag (so nothing shorted out) and it fit in the standard Strat routing for pickup selector switch/pots.  I put the battery (a single 9V) behind the tremolo block - I play with a blocked trem (like on the EC strat) so I got rid of the block of wood I had there and replaced it with the battery and another smaller piece of wood as a shim.  I did it this way for ease of battery replacement (though the battery lasted a really long time) and I don't think there's enough room for the battery inside the existing routing.  I used the original discrete circuit (with 3904 and 5807) not the opamp version.  Sorry, no digital camera so no pix

[Alpha579]

You can get the EC cicuit here http://home.rochester.rr.com/dallard/guitar/review/clap.htm

[Lonestarjohnny]

can you help me out on which transistor goes where, Q1,Q2.Q3,Q4 ?
Thanks,
JD

[cd]

The PNP is a 5087, the NPNs are 3904.