This dew heater is designed to heat the back of the Newtonian's secondary mirror.
Newtonian telescope have open tube and that can facilitate the condensation of dew on mirrors, especially the secondary. Once the mirrors are fogged up, the telescope is unusable and cannot be dried up easily with paper. A heater can prevent this problem.
Warning: make sure that the spade connectors do not touch as they may short-circuit. It is recommended to wrap each one with electrical tape to insulate them.
This model is shaped for glued elliptical secondary mirrors, it is flexible and split on one side so it can be easily installed. Gluing can be done with silicone, glue or double-sided adhesive tape (all not included).
This heater works with secondary mirrors with the longer axis of 75mm or larger. The heater warms the mirror slightly above ambient temperature and clears away dew or condensation. Once the mirror is dry, you can leave your power regulator at a low power setting (about 10%) and the mirror will remain dew free. In extreme conditions you can increase the power as needed. These heaters are very efficient at converting electricity to heat and very little power is required.
The orange thermal insulation reduces heat dissipation into the environment.
Specifications
| Wire length | 380 mm |
Connector | RCA plug |
Power usage | 2 watts max (0.17 A) |
| Internal hole dimension | 50 mm x 71 mm |
| Outer dimensions | 72 mm x 100 mm |
| Voltage | 12 V |
| SKU | TSFHeiz72 |
For all orders exceeding a value of 100USD shipping is offered for free.
Returns will be accepted for up to 10 days of Customer’s receipt or tracking number on unworn items. You, as a Customer, are obliged to inform us via email before you return the item.
Otherwise, standard shipping charges apply. Check out our delivery Terms & Conditions for more details.
