Dew Heater for Telrad

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68-Ohm 1/2 watt resistors wired in series with the wire leads covered in heat shrink. The wire leads allows the heater to be bent to conform to the shape of the telrad
Same design applied to an eyepiece heater. Resistors are incased between black electrical tape and two pieces of Velcro to facilitate the mounting of the heater to the eyepiece.