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Promenade24
Promenade24
F
BASS FILTER
X Type:
Build Level: Beginner
Based On: EHX® Bass Balls™
The 2024 version of the Promenade has no significant circuit changes and minor layout tweaks.
The Promenade is an envelope filter based on the EHX® Bass Balls™. I've included some of the
mods suggested by Mark Hammer on the DIYSB forum. These mods give the builder more control
over how the envelope behaves as well as the bass and treble frequency response.
This should be an easy project for most builders. There's nothing tricky, nothing to be tweaked to
taste or in need of further modification, IMO. It sounds great on bass, baritone and guitar.
BASS, TREB: Sets the frequency range of the swept filter for the low and high end.
SENSE: The sensitivity of the envelope filter. This controls how much signal is used to trigger
the envelope. There will be a couple of "sweet spots" depending on the instrument used
(passive/active bass, etc).
ATTACK, DECAY: These controls determine the overall shape of the envelope note. Turning
them up will increase the attack of the envelope and make the decay of the envelope much
longer. Attack, Decay and Sense all work together to offer a wide range of envelope control.
CLEAN/DIST: Left position is clean signal out. Right position adds two silicon diodes to ground
for some hard clipped distortion.
Terms of Use:
You are free to use purchased Promenade24 circuit boards for both DIY and small commercial operations. You may not offer Promenade24 PCBs for
resale or as part of a "kit" in a commercial fashion. Peer to peer re-sale is fine, though.
Technical assistance
for is available via the
available to respond via email in a timely and continuous manner, and (2) posting technical problems and solutions in the forum creates a record from which other
members may benefit.
All copyrights and registered trademarks are property of their original owners. Any mention of trademarked or intellectual properties in this documents is purely for
comparative purposes.
Overview
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madbeanpedals
forum. Please go there rather than emailing me for personal assistance. This is because (1) I'm not always
Last Updated:
November 21, 2024 4:24 PM
© 2024
madbeanpedals

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Summary of Contents for madbeanpedals Promenade24

  • Page 1 Terms of Use: You are free to use purchased Promenade24 circuit boards for both DIY and small commercial operations. You may not offer Promenade24 PCBs for resale or as part of a “kit” in a commercial fashion. Peer to peer re-sale is fine, though.
  • Page 2: Parts Layout

    Parts Layout Promenade24 pg. 2...
  • Page 3: Component Values

    Component Values Promenade24 pg. 3...
  • Page 4 Trace Layout Promenade24 pg. 4...
  • Page 5 Wiring The Promenade24 is compatible with both the SSBP and SSABP bypass boards available at madbeanpedals. The wiring is the same for both. Promenade24 pg. 5...
  • Page 6 10uF 1n4001 470n 1n4001 1n4001 220n Transistors 220k 2N5088 100R 560pF 2N5088 220n 2N5088 100k LM1458 470k 4558 470k Switches 560pF DIST On/On 220k 100uF Pots 100n ATTACK 100n BASS 100uF TREB SENSE 10kB DECAY 470k 470k Promenade24 pg. 6...
  • Page 7: Shopping List

    PCB Right Angle 16mm PCB Right Angle 16mm 10kB PCB Right Angle 16mm PCB Right Angle 16mm Additional Hardware (1) 125B enclosure (2) 1/4” mono jacks (1) Slim 2.1mm DC jack (1) Standard 3PDT footswitch (1) 5mm LED Promenade24 pg. 7...
  • Page 8 Build Notes - none! Promenade24 pg. 8...
  • Page 9: Circuit Voltages

    Circuit Voltages LM1458 2n5088 4.69 4.69 1.71 4.59 1.14 2n5088 1.89 425mV 2n5088 4558 4.69 475mV 4.69 4.69 4.69 4.68 • 9.42vDC One Spot • Current Draw ~ 4mA Promenade24 pg. 9...
  • Page 10: Drill Template

    Coordinates are denoted in (X,Y), drill size format starting from the center (0,0) location of the enclosure. Tayda drill template: https://drill.taydakits.com/box-designs/new?public_key=QjQ0MmxPZ2ZERU9BMyt1WnVkWmt2QT09Cg== Hardware 125B enclosure Mono jacks Slim 2.1mm DC jack Standard 3PDT footswitch 5mm LED NOTE: Different 1/4” and DC jack styles may require different sized drill holes. Promenade24 pg. 10...
  • Page 11 Build Pic Previous version build. Promenade24 pg. 11...
  • Page 12 Schematic Promenade24 pg. 12...

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