A modified Ram’s Head with hand-selected, unique diodes for great clipping options

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The Blue Rhino Overdrive is a modified Ram’s Head-style pedal with hand-picked mystery diodes, which provide for some  unique clipping options never before heard from this fuzzy overdriver and its brethren! Its brutality can be tamed or unleashed, either way it sounds awesome on both bass and guitar alike, adding tons of sustain and volume, as well as plenty of tonal options to your instrument’s sound.

The controls are all similar to the classic BMP setup—Volume, Distortion, and Tone. The three-way mod switch gives you three options for the diodes in the clipping section, each hand-picked and tested to help your bass or guitar kick your amp’s ass.

When the switch is up, it activates the soft-clipping Germanium diodes (marked with a blue band—which is 50% of the inspiration for the name Blue Rhino Overdrive). These diodes clip relatively smoothly, making for a very nice low-gain overdrive to complement the Ram’s Head’s flexible tone stack.

When the switch is down, the mystery diodes are activated. They are marked 290-6 and are spherical, but they clip beautifully, in the vain of silicon diodes, but a bit different than any Big Muff variant I can recall, a bit crunchier and slightly more compressed.

And because we can, the middle setting on the switch gives us zero clipping diodes for a beastly, dark, and loud-as-all-hell option. I’m looking at you, bassists. This has been called the “Jumbo Tonebender” mod.

All of this in a beautiful, simple, minimal finish, as part of my New Years resolution to make more budget pedals available to the masses. And for you DIYers who want to build your own—check out the Lemon Haze project!


  • Simple, minimal UI includes three classic control knobs and one mod switch
  • Hand-picked and tested diodes
  • Small footprint
  • Perfect for guitar and bass
  • One-of-a-kind
  • True bypass
  • 100% Hand-made with high-quality components


  • DISTORTION — Turn clockwise for more sustain, and a more saturated distortion.
  • TONE — Controls the frequency response of the output signal. Turn CW for more treble, CCW for more bass. Crossover is at about 1-1.2 kHz.
  • VOLUME — Controls the amount of volume boost
  • MOD SWITCH – Three diode modes:
    • LOW-GAIN (UP) – Germanium diodes: soft clipping, lower gain overdrive
    • BOOM (MIDDLE) – No diodes: brutal, bassier, boomier
    • GRIT (DOWN) – Mystery diodes: silicon-style, crunchier, slightly more compression


  • Power: 9V DC, center negative. No battery compartment.
  • Consumption: less than 5mA



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Return Policy

I gladly accept returns and exchanges.
Contact me within: 7 days of delivery
Ship items back within: 14 days of delivery

I do not accept cancellations on custom orders.
But please contact me if you have any problems with your order.

I cannot accept returns or exchanges for custom or personalized orders
unless the item arrives damaged or defective.

Conditions of Return:
Buyers are responsible for return shipping costs. If the item is not returned in its original condition, the buyer is responsible for any loss in value.

Shipping Information

Processing Time:
Depending on availability, the time I need to prepare an order for shipping varies. For custom builds, please allow 3-4 weeks lead time. For finished builds, please allow 1-2 weeks for processing.

Estimated Shipping Times:
Eco Post: 7–5 business days estimated distribution time for most destinations (see below), 10–12 business days estimated distribution time to Australia and Hong Kong.
Registered Mail: 4–8 weeks
I will do my best to meet these shipping estimates, but cannot guarantee them. Actual delivery time will depend on the shipping method you choose.

*** UPDATE***
Postal systems around the world appear to still be adapting to the global impact of COVID-19. This means that shipping times may be longer than we had previously been used to. I ask that you please be patient while we track the status of your package together.

Shipping Methods:
I ship out all pedal orders via Eco Post. This method is typically quicker than Registered Mail (advertised estimation is 7–5 business days, but due to the current situation has been known to take a bit longer, depending on the country), and it also features computerized tracking and proof of delivery.
This method is available in the following countries: Austria, Australia, Italy, Ireland, the United States, Belgium, Brazil, the United Kingdom, Germany, Denmark, South Korea, the Netherlands, Hong Kong, Greece, Japan, Norway, Spain, Poland, Portugal, Finland, France, Canada , Sweden, Switzerland, Thailand, Russia.

For PCB orders, you can choose between Eco Post and Registered Mail.

Customers living in Israel can arrange for Local pickup, just contact me for arrangements.

Customs and Import Taxes:
Buyers are responsible for any customs and import taxes that may apply. I am not responsible for delays due to customs.


Each Carcharias Effects pedal is hand-made by one person in his home workshop who loves making music, and making things that make music. Every purchase you make enables me to continue making more pedals, so your support is very much appreciated. That said, I take responsibility for the build quality of every pedal I make comes, and offer a 24-month warranty on each one, not covering normal wear-and-tear or abuse.

All the PCBs that I sell on this site were designed personally by me, but the fabrication is outsourced to third-party PCB fabrication services. Once they are designed, I order them in relatively small batches. I personally test every batch that I receive; however, as I am a strong believer in minimizing waste, there are cases in which I may sell perfectly functioning PCBs that might have some design flaw. I take responsibility for these design flaws (if any) and will specify their fixes or workarounds in the product's specific build document.

If you should encounter any issues with your product, please feel free to reach out to me via the contact form on this website. As I am based in Israel, I understand the inconvenience added by international shipping, and so I will be happy to assist in troubleshooting with you any problems before resorting to international shipping in case a repair needs to be made.