Keeley Katana Boost Layout Rev 2

alphadog808 was having problems with his Katana Boost build and I noticed one of the cap values was incorrect.  I also noticed that I had no motivation to fix it because it was an old pig ugly layout so thought I'd do an updated version and add it as a new thread to keep the versions separated. 

A bit smaller than my last layout and I've also included trimmers to replace the JFETs drain resistors to make it easy to bias and fine tune to your own liking.

Info about the original:

As far as guitar clean boosts go, the Katana is KING TONE. It's the pedal to have for the finishing touch on your tone.

Want a mirror image of your tone, only louder? This is it. The Katana is also a fat, harmonically rich boost, just pull out on the volume knob and stretch your imagination with overdriven tone! You can keep it on all the time to push your amp harder, or as an occasional boost to cut through the mix.

Obsessed or Compelled with the Fattest, Fullest Drive? Well, Before other people started using Blue LED's and non-diode clipping stages, there was the TMB and Katana.... Cascading FET stages do the tube-amp-thing like nothing else!

The Katana circuit is Robert Keeley's first guitar effect design for Keeley Electronics. It was originally designed for Legendary Tones for the Time Machine Boost but then became an independent product under the Keeley name after the Compressor came out. Robert's very first effect pedal design (1999) was a digitally controlled Analog Delay complete with built in digital tuner. It worked perfectly and can even be seen at the shop from time to time. Delay times could be input via a keypad to enter the amount of delay in milliseconds or by potentiometers. The Katana is no less stunning in its beautiful simplicity and stunning sound quality.

EHX Germanium4 Big Muff Pi

Ok. This has absolutely nothing in common with all the other 14 different versions of Big Muff Pi. As the effect has two individual sides, one for distortion and other for overdrive, i thought i'd draw the sides as a separate layouts. You can, of course, use one 16 x 31 board to have both effects on a single board.  Or tweak one of them to your liking and fit it in 1590B. With eight pots and two stomp switches, i don't see even Javi fitting all of this in 1590B :)

Mid-Fi Electronics Demo Tape Fuzz

Request.  Info about the original which I think is a great sounding fuzz:

created to recreate the sound of a guitar playing directly through a 4-track cassette recorder, the Demo Tape will bring you back to your 4-track days. spatty supersaturation and harsh to thick and full, the Demo Tape comes equipped with a two band EQ, volume and trim for simple, versatile and practical tonal shaping. four controls are Bass, Treble, Volume and Trim.

EWS Bass Mid Control

Originally in a 1590A size box, this may be a struggle to get in although I'm sure Javi will find a way :o)
The original used a dual concentric pot for the Boost/Cut and Frequency controls, but I think they are almost certainly going to be special order as one side is 50K reverse log and the other is 100K dual linear.  So maybe just using two pots would make more sense for the average DIYer.

The trimmer is for volume and is designed to be pretty much a set and forget.  Set it for unity, or a slight boost or whatever you favour and then close up the box.  Again though some people may prefer to alter it slightly, do away with the trimmer and have an external volume pot.

Make sure you use 25V rated caps if you want to power it with 18V.

Info about the original:

The new Bass Mid Control is the active mid-controller for bass players. A small but powerful pedal that provides frequency control adjustments between 120Hz ~ 3kHz. When using 2-band EQ or passive bass, the Frequency control provides excellent manipulation of the mid frequencies, while the Boost/Cut gives you boosting or cutting capabilities of up to + / - 12dB. This compact pedal can also be powered by a 9V battery or for additional headroom use an 18V power adapter. This pedal will provide you the flexibility to play any musical style.

Rivera Buf V

Somewhat similar to a Microamp, but with clever switching which effectively turned the booster into a buffer for bypass mode.  I've included an ICL7660S to provide the -9V for the circuit.

The original also included A/B switching at the output and a simple loop, so I've included a simple A/B wiring configuration on the layout in case anybody fancies including that too.  Adapt this with your favourite switching method if you also want to include an A+B option and add a true bypass loop if you want one.

I think this dates back to the 70s or 80s and so I can't find any manufacturers info about the pedal but did find the following information:

The Rivera brand is most famous for its very high quality amplifiers. It is offering new effect pedals these days but this one dates back from the 80's. These days boosters, loopers and A/B boxes are quite popular and Paul Rivera was quite a precursor by offering all three functions into one pedal. This buffer came on the market in many disguises: PMP buffer E945, PMG buffer E945, Rivera Buf IV and V. It is battery or mains powered and has a heavy and durable diecast chassis. Rivera also offered simpler versions like A/B boxes or simple loopers, and even used the box for its M-series and S-series amplifiers' footswitches.

The circuit of the E945 is very simple with a single op-amp taking care of the buffing and boosting duties, while the loop is post-buffer/booster. The pedal works really well and the amount of ultra-clean boost is quite staggering with an internal symmetrical supply of +/-12 volts. This E945 is ideal with a twin channel Blackface/Silverface amp or with a two amp setup giving a pseudo 4 channel rig with one simple pedal.