SKU: 51236850211
harmonic percolator pedal

harmonic percolator pedal Fredric Effects Utility Perkolator MKII

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Description

harmonic percolator pedal Fredric Effects Utility Perkolator MKIIFast Free Shipping No Taxes, Duties, Tariffs Free Returns $199 is your absolute final total here for the the Fredric Effects Utility Perkolator MKII pedal. This Utility Perkolator is Fredric's latest version of the highly sought after Harmonic Percolator from the 1970s, made famous by Steve Albini of Shellac. This MKII version pedal comes in a new triangular wedge enclosure and has some new features added as well. They added a ring modulator switch,

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$199 is your absolute final/total here for the the Fredric Effects Utility Perkolator MKII pedal.

This Utility Perkolator is Fredric's latest version of the highly sought-after Harmonic Percolator from the 1970s, made famous by Steve Albini of Shellac.

This MKII version pedal comes in a new triangular wedge enclosure and has some new features added as well. They added a ring modulator switch, for octavey/splattery overtones. This ring circuit is closely related to the vintage Dan Armstrong Green Ringer effect. Also, on the inside of the pedal, you will find 2 dip switches on the circuit board, to remove the low pass filter if desired (see "CONTROLS" below for details).

Demo Video:
Check out the awesome pedal demo video on this page.
Many thanks to Regent Sounds in London for this video!

 

Before we get way into the Utility Perkolator MKII, the next 2 paragraphs simplify the difference between the Fredric Effects Harmonic Percolator and their Utility Perkolator:

Fredric Effects Harmonic Percolator - this clone is the 100% vintage correct circuit, with the hard-to-find, new old-stock vintage components. It has the unpredictability of the vintage Harmonic Percolator on which it is based, with a raucous edge to the sound, and a fizzy decay note.
 
Fredric Effects Utility Perkolator - this is the result of experimenting with the Harmonic Percolator circuit for a few years. It uses lower leakage, old stock USSR germanium transistors, and incorporates a very subtle low pass filter, which takes the fizz out of the decay and makes it generally a "better behaved" Harmonic Percolator. However, it is still capable of some great, full-on fuzz sounds!

 

The Harmonic Percolator is a simple, yet fascinating circuit which readily lends itself to some tweaking. Fredric Effects already builds a faithfully vintage version of the Harmonic Percolator, however their Utility Perkolator MKII takes this circuit in another direction.

Using higher gain, lower leakage Russian Germanium transistors, and a low pass filter which only removes the high-end hisses and glitches associated with the Harmonic Percolator, the Utility Perkolator MKII has a considerably lower noise floor, and more predictable note decay. The result is a tighter and more controllable effect which is still capable of producing the classic Harmonic Percolator sound.

Reviews from our customers at Reverb:

 


CONTROLS:

Harmonics:
Controls the gain of the circuit.

Balance:
Controls the overall volume of the effect.

Si-Ge Switch:
Selects 3 diode clipping options.
Up - Silicon clipping for a smoother sound.
Down - Germanium clipping (like the original Harmonic Percolator) for a grittier sound.
Middle - No clipping, for a more open and less "fuzz" sound.
The overall volume will be higher with no signal clipping selected.

New for Version 2...
Ring Switch:

This engages a ring modulator switch, for octavey/splattery overtones. This ring circuit is closely related to the vintage Dan Armstrong Green Ringer effect.

Dip Switches on the circuit board inside the pedal:
R8 bypass, NR on - A simple, yet subtle low pass filter. By default (see photo of the inside), these switches are in the positions OFF, ON = low pass filter engaged. To disengage the filter, you can set these to ON, OFF.

 

MORE INFO:

Power Sources (each sold separately):
This effect is powered by a 9v, center-negative jack (like Boss, and most all other pedals use). Current draw is 10ma. Or it can use a standard 9v battery.

Warranty:
This product comes with the Fredric's 2-year limited warranty.

Shipping:
Ships fast! Usually same day, with Free UPS Shipping in U.S. with tracking (1 biz day processing, 1-3 business days transit time usually). 1 and 2-Day guaranteed shipping are also available.

Our added value, when purchased here at coolguitarshop.us:

  • Best total price: $199 is your absolute final/total, with Shopify Secure Checkout
  • Fast Free Shipping in U.S.
  • No Sales Taxes, Duties, or Tariffs (We pay all of these for you.)
  • No Risk: Try it on your own rig for 30 days. Don't love it? Return it for a full refund... no hassles, no costs. (We'll email you a pre-paid return label.)
  • Rock-solid customer service, 365 days a year

Enjoy the upgrades, and get into those classic sounds of Steve Albini and many others, with the Fredric Effects Utility Perkolator MKII.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
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  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
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SKU: 51236850211

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Karly
Los Angeles, US
★★★★★ 4
Good stuff
Not the actual Dr. Melaxin but it still works!
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Reviewed in the United States on May 9, 2026
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Lex
Waukegan, US
★★★★★ 5
Great sunscreen
Size: 2.82 Fl Oz (Pack of 1)
No white filmy cast. Soothing and easy to apply.
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Reviewed in the United States on June 6, 2026
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JEFF
Port Orchard, US
★★★★★ 5
Beef Tallow Sunscreen
That dry, stretched sensation that I sometimes get from using other sunscreens was not something that I experienced with this one. On the contrary, I had the impression that my skin remained supple and pleasant throughout the morning. I used it prior to going about my errands, having a drive, going for a stroll outdoors, and spending time at the park. To my satisfaction, I did not feel the need to quickly apply another moisturizing lotion on top of the one I was using in order to restore the natural feel of my skin. Simply said, it made it simpler for me to utilize on a daily basis. When I wore it for a longer period of time, I also paid attention to how it felt on my face. Even though I wore it on a number of days when the temperature was high, I did not experience any discomfort as the day progressed. Despite the fact that I was aware that I was wearing sunscreen, I did not feel any discomfort or want to wash my face straight away with it. Because I am quite particular about the products that I use on my face, I found that to be really helpful. In addition to having a sunscreen that is dependable, I want it to be something that I can really endure for a considerable amount of time.
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Reviewed in the United States on June 9, 2026
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Kate
Carnegie, US
★★★★★ 5
The Best Way to Keep My Skin Happy Under the Sun
I am so happy that I found this special white cream because it is the best helper for my face and arms when I am playing outside in the big bright sun. I keep the bottle right near my sink so I can put it on before I go out to play, and it is very easy to use because the cream feels very smooth and soft like butter when I rub it on my skin. Sometimes other white creams feel very chalky or yucky like flour, but this one is a great deal for the price because it blends in so well and it does not leave a big white ghost face on me once I rub it in. It feels very simple and clean on my skin and it does not have a scary or strong smell, which makes me very happy because it does not feel greasy or oily like a piece of pizza. Even when I put more on later in the day, it does not clog up my skin or feel heavy like a thick blanket, so it is a wonderful value because I can use it all day long and stay comfortable. The tube is a perfect size to throw in my backpack or my travel bag when we go on a trip, and it feels very strong and tough like it will last a long time without the cap breaking off. It is a very practical and smart tool for my skin because it forms a strong layer that I can see at first to make sure I am safe, and it feels much better and more dependable than thin lotions that disappear too fast. I think everyone who likes to be outdoors should get this because it is durable, it works perfectly to keep me safe, and it is so simple and easy to use that it never gets in the way of my fun!
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Reviewed in the United States on April 14, 2026
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Aurora
Chelsea, US
★★★★★ 5
Comfortable to Wear and Easy to Use Every Day
The texture was the first thing I felt. First application feels rather rich but unexpectedly distributes easily throughout the skin. I was worried it would feel heavy, but it blended in more readily than I thought and didn’t leave my skin feeling too oily afterwards. I love that you can use it on the body and face too. One product for the entire family is easier and saves room when packing for trips or holidays. I have used it on myself and my kids when we go out and it has been comfy for all of us to wear. Another thing I appreciate is my skin feels hydrated after using it. Love things that make my mornings easier on hectic mornings. The mixture is smooth and pleasant to wear all day long and does not feel sticky. The container is functional and simple to throw in a beach bag or handbag. I have brought it to soccer games, trips to the playground, family picnics and it has been no problem.
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Reviewed in the United States on June 4, 2026

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