Dew heater for 300 mm diameter telescopes (PrimaLuceLab, SKU: PLLFAS300 ) is a flexible heating band designed for telescopes with a tube diameter of around 300 mm – ideal for popular 10-12″ instruments (Schmidt-Cassegrain, Newtonian, RC). It gently heats the outer surface of the tube, preventing moisture from settling on the mirror or corrector and ensuring uninterrupted operation of the optics even in very humid conditions.

Key Features of the 300mm Heating Band

• nominal diameter 300 mm - Velcro strap covers tubes 290-310 mm
• even heating element protects the optics without spot overheating
• 12 V DC power supply (5.5 × 2.1 mm plug, plus in the center) – full compatibility with EAGLE / ECCO controllers and most dew-heater controllers
• low power consumption – at typical voltage it does not significantly load field batteries
• wide, soft Velcro strap – quick assembly and even pressure on the tube
• 2 m power cable allows you to conveniently run the cables along the mounting

Set components

• PLLFAS300 heating band with 12 V DC cable

Technical parameters

• tube diameter range: 290–310 mm
• supply voltage: 12 V DC
• connector: 5.5 × 2.1 mm plug (plus in the middle)
• strap length (unfolded): 105 cm
• strap width: 40 mm
• cable length: 2 m
• weight: 150 g
• manufacturer: PrimaLuceLab – Italy

The PLLFAS300 headband is a simple and effective solution to the dew problem on large telescopes, allowing you to maintain high image quality and avoid session interruptions caused by moisture.