Astrozap Two Channel/Four Output Dew Heater Controller

AstroZap Two Channel / Four Output Dew Heater Controller

Managing dew doesn't have to mean “all or nothing.” With the AstroZap Two Channel / Four Output Dew Heater Controller, you get fine-tuned, independent control over your dew heaters—allowing you to distribute power exactly where it’s needed and conserve battery life in the process.

This compact and reliable controller features two separate channels, each with its own adjustment knob and two RCA-style heater outputs—giving you a total of four heater ports. Want to run your corrector plate at full power while keeping your finder heater at a gentle trickle? No problem. Each channel handles that independently, so your dew prevention strategy can adapt to changing conditions.

Power is supplied via a standard 12V DC input, and the unit can handle a combined load of up to 5 amps, enough to run multiple heaters simultaneously without breaking a sweat. The enclosure is rugged and observatory-friendly, with LED indicators and tactile dials that are easy to operate even in the dark with gloves on.

Features:

• Controls up to four dew heater elements (RCA connections)

• Two independent control channels—each with separate output level

• Powered by standard 12V DC (cigarette-style plug)

• Total current handling capacity: 5 amps

• Ideal for running heaters on corrector plates, finders, eyepieces, and Telrads

• LED power indicators and easy-grip control knobs

• Compact and durable housing for field or permanent setup use

Observing Tip:

You don’t need to run all your dew heaters at full power all night—that’s a fast way to drain your power supply. This controller lets you “set it and forget it” per device. For example, run your corrector plate higher, but keep your eyepiece and Telrad heater at lower settings to stretch your power budget through a long night.