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From the Kendrick website.
POWER SUPPLY AMP HOUR RATINGS
Please bear in mind that when using this chart to determine what size of power supply (as opposed to a battery) to choose, you will need to use the full amperage rating of the heaters in question. The heaters will draw their full amperage when turned on and unlike battery operation, the amperage cannot be averaged by the % of your programmed controller settings.
All figures are in amps
Telrad Heater 0.4
Telrad Finder Heater 0.2
.965" 0.2
1.25" 0.2
2" 0.3
3" 0.8
4" 0.9
5" 1.2
6" 1.4
7-8" 1.5
10" 1.9
11" 2.3
12" 2.6
14-16" 4.1
DIAGONAL MIRROR HEATERS
S2 0.2
S3 0.3
S4 0.7
PRIMARY MIRROR HEATERS
P8 0.8
P10 0.9
P12 2.6
P16 4.5
OTHERS
Control Pad Heater 0.6
Laptop Heater 3.0
Eyepiece box heater 0.8
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