Kendrick GSO RC Telescope Secondary Mirror Heater

The new models address the ever-changing secondary mirror designs found on “GSO” style telescopes (sold under several brand names) made over the last decade. Easy to install and no need to disassemble the mirror assembly.

Heater sizes are based on the diameter of the secondary mirror shroud. To determine the correct size, simply measure the outside diameter of the mirror shroud and find the model that comes closest to the measurement you made.

Our most recent research found that primary mirror size tends to have secondary mirror sizes as shown in the ''technical specidifactions'' section, but you should still take your own measurement to be certain.

To make heater installation easier, the heater wire leads have been divided into two segments. Each segment has small quick connectors installed onto them. The wire leads out of the heater are 6” (150mm) long. Once the heater is properly secured to the mirror shroud the second wire segment in connected to leads coming from the heater.

This is a 42" (1065mm) extension which is routed across one of the spider vanes. This extension wire terminates in a female RCA plug. This connects to an RCA male-to-male extension cord (included) which goes from the heater’s female RCA connector to a Kendrick dew controller.

Technical Specifications

Beware that the length of the heater strap is always shorter than the actual circumference of the mirror shroud. Do not be concerned about a “gap”. Our recommendations are based on calculating the amount of heat that is necessary to protect secondary mirrors found on popular telescope sizes.

In the Box

Selected GSO RC Telescope Secondary Mirror Heater :

• GSO Secondary Mirror Heater for Shroud Diameter 3" / 76mm (2028-GSO-A)
• GSO Secondary Mirror Heater for Shroud Diameter 3.82" / 97mm to 4.4" / 112mm (2028-GSO-B)
• GSO Secondary Mirror Heater for Shroud Diameter 5.6" / 142mm to 6" / 152mm (2028-GSO-C)
• GSO Secondary Mirror Heater for Shroud Diameter 6.9" / 175mm (2028-GSO-D)

Warranty & Manuals

Kendrick's Warranty

Installation Sheet Instructions for #2028-GSO Heaters (PDF)