Thursday, 19 September 2013

BJFE / Bearfoot Model G

I was struggling to get this one 21 columns wide max, so Miro will have to forgive me for the placing the Nature pot wires at different sides of the board.  Sorry mate :o)

Info about the original:

The Model G captures the unique voice and response of an often overlooked brand of amps from the 50s/60s ~ the Gibsons that were right there at the beginning with Fender, Valco ,Vox and Marshall..

Somewhere near the tweeds and supros but with a stronger and clearer voice, and a particular upper mid sound and snarl.

The Model G is related to the Honey Bee the same way a Gibson Falcon or GA40 is related to a Supro … cousins with obvious similarities, but important differences.

The volume, drive and nature controls are on both models.

The C knob is a big part of the difference – it controls several things at once:  the upper mids eq and snarl and  slight speaker compression … like adjusting to different speaker choices and ages or even like moving a mic aimed at the speaker.

Tuesday, 10 September 2013

Pink Jimi Photon's Photonic Juergulator

Pink Jimi Photon's take on Interfax Harmonic Percolator and Escobedo's Jerkulator.

Read maestro Photon's complete description on FSB.

rock the f**k on!! ;)  the vid/audeo is outta sync, too.....arrrrgh  who needs LSD?

Sunday, 8 September 2013

MXR Custom Badass Modified O.D.

Next up in the MXR Custom Badass line is the Modified Overdrive—a classic overdrive circuit with modern modifications for improved performance and versatility.

For added flexibility, we’ve added a 100HZ cut and boost control that allows for a more focused EQ when cut, or a beefier tone when boosted. The Bump switch engages an alternate EQ voicing that boosts the lows and mids. Put it in front of the '78 Custom Badass Distortion for a slew of amp-like gain structures that won't mask your tone.

Experience overdrive nirvana courtesy of the MXR Custom Badass team.

“My tone has never been better, and I ain't just sayin that. That Badass Overdrive is THE BEST distortion tone I’ve ever had. Its amazing!” - Nashville session ace Chuck Ward.

Couple of the values may seem a bit off, so use the closest ones you have, like 27n for stated 28n and so on.

MXR Custom Badass '78 Distortion

The first in a line from the MXR Custom Badass design team, the MXR Custom Badass ’78 Distortion is a factory-modded pedal that roars with huge amp stack tones and old school tube amp-like distortion.
We took a classic distortion circuit and hot-rodded it to the next level for over-the-top soaring leads and rich, saturated rhythms. With only three knobs, dialing in Badass tone is a cinch. The CRUNCH button allows you to choose between two different modes of diode and LED clipping, boosting the harmonic content of the distortion.

The '78 Distortion's wide open amp-like sound sounds great whether it's in front of a clean amp, a slightly dirty amp, or a full on overdriven amp. Under the hood, this high performance machine features top notch circuitry and hardware meant for a lifetime of use.

Some of the cap values may seem a bit off. These are the measured values of the SMD components on the actual board. So i suggest you try on the values that are closest to the ones measured. Same thing with semiconductors.

Now this layout is also verified, thanks to Csaba and John for their footwork.

Friday, 6 September 2013

Plexi-Drive with Trimmers

Yup. Most of you who know me know that i've had more than enough trouble with JFET biasing on some fixed drain resistor designs... This one also has the input cap and pulldown resistor at the input. Already verified by me. I found the best gain to be with drains at ~5V, but now you can tweak them to the voltage you want. Used 20K pot for tone. 50K should be fine too.

Thursday, 5 September 2013

Nobels FU-Z Fuzz

Happened to spot one on ebay for mere 250 usd. A bargain. For this layout, i omitted the buffers and electronic switching. 30K pot value may be hard to  source, so one could try 50k pots for all of them. Original unit has 2SC2240BL transistors which are low noise devices with BCE pinout and hFE range of 200-700. I think 2N5088, 2N5089, BC549 or BC550 with gains at 400-500 should do just fine. The transistor image is for 2N* devices, so mind the pinout and experiment.