The GUP Tech Dust Transmitter Foazz, which the maker also calls the DT FOAZZ or Dust Transmitter Fuzz, is a fuzz pedal built around a silicon transistor circuit. Its defining control is a BIAS knob that acts on the voltage delivered to the transistor, producing what GUP Tech describes as that dying battery tone1. It belongs to the maker's wider family of fuzz designs covered on the Fuzz Pedals page.
Controls and how it works
The pedal keeps things simple. GUP Tech describes the BIAS knob as the core of the circuit1:
"The core of the pedal is the BIAS knob, acting on the voltage delivered to the transistor, giving that dying battery tone"1
GUP Tech product page1
Because the knob works by starving the transistor of voltage, it mimics what happens to a fuzz when its battery runs down, a sound players have chased since the earliest fuzz units. The circuit itself is silicon based, which the maker states plainly: "The GUP Tech DT FOAZZ (or Dust Transmitter Fuzz) is our Silicon transistor fuzz circuit"1.
Power
At 4 mA the pedal is light on any supply, and the 9 Vdc center negative standard means it works with ordinary pedalboard power1.
Availability and related pedals
The Dust Transmitter Foazz is listed as sold out on the maker's page1. It is the green color option of the FOAZZ circuit, and GUP Tech's fuzz range also includes the Phoque Face Fuzz, the Bee Fuzz, the Clippy Fuzz and the Hot Foazz.
One player quoted on the maker's page, Ryan, said: "Awesome fuzz i use it for garage punk stuff."1
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Questions
What does the BIAS knob do on the Dust Transmitter Foazz?
The BIAS knob is the core of the pedal. It acts on the voltage delivered to the transistor, which produces what GUP Tech calls that dying battery tone. Turning it changes how the fuzz circuit behaves, from fuller sounding settings toward the sputtering, degraded character of a fuzz running on a weak battery.
Does the Dust Transmitter Foazz use a silicon or germanium transistor?
It uses a silicon transistor. GUP Tech describes the DT FOAZZ, or Dust Transmitter Fuzz, as its silicon transistor fuzz circuit. Silicon transistor fuzzes are generally steadier under temperature changes than germanium designs, which is one reason many modern fuzz pedals are built this way.
What power supply does the Dust Transmitter Foazz need?
It needs a 9 Vdc center negative supply and draws 4 mA. That low draw means it sits easily on any pedalboard power supply without worrying about current limits.
Is the Dust Transmitter Foazz still available?
As of the maker's product page dated 26 October 2026, the Dust Transmitter Foazz is listed as sold out. GUP Tech builds its pedals in small runs, so the page is worth watching if you want one when stock returns.
What is the Dust Transmitter Foazz a variant of?
It is the green color option of GUP Tech's FOAZZ circuit, also called the Dust Transmitter Fuzz. The standard GUP Tech FOAZZ carries the same silicon transistor fuzz design.
Sources (1)
- Dust Transmitter Foazz, guptech.ca
