Download Print this page

Mad Bean Pedals VFE Focus Quick Start Manual

Fx type: ultimate mid boost

Advertisement

Quick Links

Guitarists have long used tubescreamer-style overdrives as a clean mid boost by turning the gain down and
cranking up the output. The FOCUS is the answer to the search for a better, more versatile mid boost pedal.
Developed in collaboration with Adam "Nolly" Getgood from Periphery, the FOCUS employs variable bass and
treble cut filters for control over top end grit and low frequency saturation, no matter how many strings your
guitar has!
HOW THE Focus CAME TO BE
"My idea for the Focus came from many years of using various overdrive pedals to boost the front end of high-
gain amps, taking advantage of the natural high- and low-end filtering those pedals have, which results in the
unmistakably tightened and smoothed sound heard from countless rock and metal players both live and on
recording. Pretty soon I realised that using this common overdrive EQ and combining it with a clean boost could
accomplish the same result without the unnecessary clipping stage of an overdrive pedal. By making the filters
adjustable, the player could completely fine tune the response of their guitar and amplifier without being stuck
with the fixed filters of their usual boost pedal. I approached Peter at VFE and he understood what I was after
straight away - the Focus was born very soon afterwards."
TIGHT: Sets the frequency roll off point of the variable bass cut. Turn counterclockwise to cut bass frequencies
for a tighter bottom end. RANGE: 70Hz to 1.5kHz.
SMOOTH: Sets the frequency roll off point of the variable treble cut. Turn clockwise to cut treble frequencies for
a smoother top end. RANGE: 320Hz to 7.2kHz.
LEVEL: Sets the gain of the output stage, up to 26dB of extra clean boost!
MIX: Blends between the dry signal (counterclockwise), and the EQ signal (clockwise). Use the blend to roll off
the strength of the bass and treble cuts.
SLOPE: Toggles each band between a 1-pole and 2-pole cut filter. More poles = sharper frequency rolloff.
INTERNAL CONTROL: The internal MAKEUP trimpot sets the makeup gain of the dry signal path. This trimpot
lets you set the relative volume of the EQ and dry signal paths, or you can use it to add even more clean boost
to the dry signal path.
Terms of Use: You are free to use purchased Focus circuit boards for both DIY and small commercial operations. You may
not offer Focus PCBs for resale or as part of a "kit" in a commercial fashion. Peer to peer re-sale is, of course, okay.
From the VFE Website:
http://vfepedals.com/focus.html
VFE Focus
FX TYPE: Ultimate Mid Boost

Advertisement

loading
Need help?

Need help?

Do you have a question about the VFE Focus and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Summary of Contents for Mad Bean Pedals VFE Focus

  • Page 1 VFE Focus FX TYPE: Ultimate Mid Boost From the VFE Website: http://vfepedals.com/focus.html Guitarists have long used tubescreamer-style overdrives as a clean mid boost by turning the gain down and cranking up the output. The FOCUS is the answer to the search for a better, more versatile mid boost pedal.
  • Page 2 Build Guide Dimensions: 2.17” W x 2.025” H Note: Use the values listed on the image above – not the values indicated on the silk-screen of the PCB. Some values changed over time in the VFE product cycles.
  • Page 3 Trace Routing Knob Layout...
  • Page 4: Shopping List

    Shopping List Value Type Rating Spacing 100R *see notes 1/4W 220R Metal / Carbon Film 1/4W 7.5mm 7.5mm 1k43 Metal / Carbon Film 1/4W Metal / Carbon Film 1/4W 7.5mm 470k Metal / Carbon Film 1/4W 7.5mm 7.5mm Metal / Carbon Film 1/4W 22pF MLCC...
  • Page 5 BOM Notes 22pF (2.5mm MLCC): http://www.mouser.com/Search/ProductDetail.aspx?R=C315C220J5G5TAvir- tualkey64600000virtualkey80-C315C220J5G 100n (2.5mm MLCC): http://www.mouser.com/Search/ProductDetail.aspx?R=C320C104K5R5TAvir- tualkey64600000virtualkey80-C320C104K5R Bourns 3362p (2k): https://www.mouser.com/ProductDetail/Bourns/3362P-1-202LF?qs=s- GAEpiMZZMvygUB3GLcD7sb71EWCGEDbMej%2fZaROi94%3d OPA2134a: http://www.mouser.com/Search/ProductDetail.aspx?R=OPA2134PAvirtualkey- 59500000virtualkey595-OPA2134PA http://www.smallbear-electronics.mybigcommerce.com/ic-opa2604ap/ DPDT On/On (Pin Mount): http://www.smallbear-electronics.mybigcommerce.com/dpdt-on-on-short- lever-pc-mount/ 9mm Plastic Shaft (1kB): http://smallbear-electronics.mybigcommerce.com/alpha-single-gang-9mm- right-angle-pc-mount-w-knurled-plastic-shaft/ 16mm PCB Mount (50kA): http://smallbear-electronics.mybigcommerce.com/alpha-single-gang- 16mm-right-angle-pc-mount/ 16mm Dual-Gang (10kA): http://www.smallbear-electronics.mybigcommerce.com/alpha-dual-gang- 16mm-pc-mount/...
  • Page 6 Build Notes As recommended on pg.4, jumper the two spots for the 100R resistors like so: Version 1.1 of the Focus (the board that ships with this project) requires a 1M resistor soldered across the two outside pins of the right-side DPDT. This was added to prevent a small switch pop. Ver. 1.3 (the one shown on the Trace layout on pg.2) has this resistor on the PCB.
  • Page 7 Wiring This project does require a charge pump on the Switching Board.
  • Page 8 Schematic...
  • Page 9 Build This pic was taken before adding the 1M jumper across the DPDT (right under the “Focus v1.1” text). Also, the 100R resistors are on the PCB because I elected to short them on the bottom rather than remove them (to lessen the chance of damaging it).