AstroSystems - Secondary Dew Guard

For 2.6-3.1 inch mirrors

AstroSystems amazing Dew Guard secondary mirror heating system automatically senses the air temperature and the mirror
temperature, then maintains the secondary at a preset (adjustable) temperature above the ambient air temperature.  Gently warms
the secondary at 2-4 watts when on full.  The DG-1 has 4, The DG-2 has 6 and the DG-3 has 8 evenly spaced contact points for
optimal thermal distribution.  Uses any external 9-15 volt dc supply or you can run on a 9v battery mounted at the holder,
eliminating the need for wires across the spider.  No more heat ropes!  Three sizes to choose from.

Note: If your secondary is glued to a center post, the Dew Guard cannot be used.
 
Dew Guard Installation Kit

The Dew Guard installation kit contains all the hardware to wire the Dew Guard across the spider and connect to the remote
switched battery box.  Click the link below for complete installation instructions.

Kit includes:
Wire-24 inch (28 gauge) and 9V plug
9V Alkaline Battery
9V Battery Case w/ switch
Wire Mount Screws- #8 x 1/2 inch
Wire Mounts (adhesive backed)
Aluminum Tape- 12 inch
Velcro- 2.5 inch
Wire Ties- 3
Heat Shrink Tubing