Explore CHIME:  Demos | FOUNDRY Series


SHIPPING: All pedals are made-to-order by our small team of three partners. Orders ship within 1-2 weeks. Reach out any time for an update.


The Pettyjohn CHIME MKII is a major update to our signature low-medium gain overdrive. Since it’s release nearly three years ago the CHIME has become our most popular pedal to-date and gained somewhat of a cult following. The CHIME has been loved for its ability to sweeten your signal with the touch sensitivity of vintage English amps on the edge of break up. The sweet saturation and harmonic excitement ends up being always-on for many players.


Let’s start by saying everything we love about the CHIME V1 has been preserved. Our team listened to feedback from players and dealers alike and then sharpened our pencils and set out to improve one of our favorite pedals. Through much toil we believe we have taken this pedal to the next level both sonically and functionally.


FOUNDRY Series - Dual Rail Power Supply
All Pettyjohn FOUNDRY Series now include one of our biggest innovations ever: a new proprietary dual rail charge pump. This little gem is a major upgrade from our CORE Series charge pump and is a sophisticated dual rail dc to dc converting internal power supply. Our charge pump provides an incredible +/-18v of internal power, for a total of 36v, and all from a standard regulated 9v power adapter (200mA). Say what!?


When you increase voltage you increase the headroom which then affects the tone and feel of a pedal. Dual rail power supplies are usually found only in classic studio gear, until now. The FOUNDRY Series charge pump delivers up to a massive four times the headroom of most guitar pedals. This high headroom imparts an openness and 3D quality that is unique to Pettyjohn FOUNDRY Series pedals. 36v is the maximum spec for most opamps empowering the high-qualify opamps in FOUNDRY Series pedals to operate at their maximum potential.


FOUNDRY Series - Silent Bypass
We have had many requests for this over the year and were happy to announce all FOUNDRY Series now shop with a totally quite foot switch enhanced with a sonically transparent gold contact relay. It auto-bypasses when the power is disconnected, never leaving you in the dark. Hardwire, classic true bypass is available via custom order on our website for those who may prefer this option.


FOUNDRY Series - The Indestructible Enclosure

While most pedal companies opt for an off-the-shelf enclosure, we took the path less traveled. FOUNDRY Series boasts a nearly indestructible two-plate custom enclosure design forged from mild steel right here in the USA. The boxes feature a gentle sloped front edge to protect the top control panel, features recessed bottom screws, and is finished with a thick powder blast of sparkling hues that will have you gitty as a goon.


FOUNDRY Series - Studio Grade Components

At Pettyjohn we build true studio-grade pedals. No, this isn't some cheeky marketing jargon; we accomplish extremely low signal noise with carefully selected top-shelf components:


  • Burr Brown OPA input and output buffer
  • Audiophile grade, through-hole 1% metal film resistors
Top-shelf WIMA and Silver Mica caps used in tone sensitive operations
  • Lead-Free PCB constructed with Audiophile lead-free silver solder

  • Carefully selected upgrade mods for every Pettyjohn pedal


PriceFrom $299.00
CHIME Opamp Mods
CHIME Clipping Mod
  • Dual 990 Discrete Opamp Mod - The stock CHIME MKII ships with high quality Burr Browns opamps taking care of input and output buffering. Upgrading to the CHIME MKII opamps replaces one Burr Brown with a dual studio-grade 990-style discrete opamp. This chip runs the input buffer and the active level control stage giving the CHIME MKII a more natural, open sound quality that is truly uncompromising.


    Max Harmonics Mod - Replaces the stock 1N34A diodes with NOS Telefunken diodes that are very harmonically rich, producing a sweeter tone you will love.

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CORE Series was announced in 2020 as an approachable pedal line that dives deep into the realm of studio-grade analog boutique guitar pedals while leaving pretension at the door.

FOUNDRY Series is our original 'hold-nothing-back' lineup of studio-grade analog guitar pedals which we fully retooled in 2019 with all-new MKII versions of the entire line. With the introduction of MKIIs we unveiled our industry leading high-voltage power system, a new relay based quiet bypass circuit, custom enclosure enhancements and more.


Pettyjohn Electronics is a studio grade boutique guitar pedal company founded in 2014 by mastering and electrical engineer Stephen Pettyjohn.


Our engineering focuses on analog signal processing with discrete op-amps, high-voltage power pumps, and custom mods, with all stages using top-shelf audiophile componentry.


All Pettyjohn pedals are designed, forged and wired in the USA by our small team of three partners.


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