These heaters are designed to fit behind the mirror of "tube versions" of GSO RC-8, RC-10 and RC-12 Ritchey Chretien telescopes. It is a flexible, split ring design, which makes it very easy to install. It fits onto the back of the secondary mirror housing and is held in place by silicone glue (user provided).
The Heater is thermally insulated with 1/8" (3mm) thick neoprene sponge foam. The foam is bonded to the heater. The foam will help the heater to direct the heat into the secondary mirror housing and aid in preventing excessive heat loss into the atmosphere and giving better heater performance.
Will this heater work on the new Truss-Tube" models? We aren't sure, but we would love for someone who owns one to drop by our shop for a fitting. We have 1 report from a customer who has a 12" Truss-Tube model who reports that the design of the spider/mirror assembly changed and the gap between the spider vanes and mirror housing is now too narrow for the heater to fit as intended. Our best advice is to make some careful measurements and consult the specs. shown above.
- 12 vdc, 5 watts, .4 amps
- Outsidth width...3.5" (90 mm)
- Inside width...2.625" (65 mm)
- Overall thickness...0.195" (4.85 mm)
- Wire length...18" (460 mm)
Installation Sheet Instructions for #2028-GSO Heaters (PDF)