The scope I built is a
Galixy Optics 1/25th
wave 20"f5 2" thick primary
Galixy Optics 3.1 EDF
Feather Touch 2"
Dob Driver 2000 with
finder with pulsing bull's-eye and heater.
The scope fits in so nicely that you could go four wheeling
with it! Plenty of room for all of your camping and or stargazing needs.
Carpeted form fitting cradle snugly fits main tube.
Built in Mirror storage with temp control.
A shelf holds the secondary mirror section snugly.
A compartment that hold two deep-cycle marine batteries
can be charged via an onboard retractable 110v line or the tow vehicles
Backlit power reserve meter.
110v/1500wt inverter with two GFCI outlets.
50 wt/ch AM-FM stereo cassette player.
Red light backlit Heated Eyepiece holder with two heat settings. Room for
ten 1 ¼ eyepieces and eight 2” eyepieces.
Programmable Temp humidity sensor for ambient, mirror
storage and mirror itself with automatic multiple fan controls.
Red or white selectable interior lights.
Variable intensity chart lights.
12v wing nut posts and two cigarette lighter plugs for miscellaneous
Six foot ladder storage compartment.
Dimmable red LED clock on GMT, synced to the atomic
clock at the naval observatory.
About the temperature controlled mirror
I discovered the need to cool my mirror the first time
I took it out. Tube currents. An 80 pound piece of Pyrex doesn't cool very fast
or evenly. It took over 3 hours for perfect "seeing". The mirror was
in my garage that day and it was probably 90 degrees in there. That night it
went down to about 60 degrees and my mirror was still hot. I did install a fan
in the mirror cell but that proved to be insufficient. I knew that if I cooled
it to much it would dew up. That same day I saw a Coleman camping cooler that
kept food cold or hot and used 12 volts to do it. That's it! but how in the hell
does this thing work and where do I get the "thing" from? I called
Coleman. They sold me a thermo-electric Peltier chip, the heat sinks that go with it
and the installation instructions needed to repair the cooler. All this for 30
bucks. The device uses the Peltier effect. Just apply 12 volts and one side gets
hot and the other side gets cold. Reverse the power and the opposite sides heat
and cool. It turned out that the cooler you keep the hot side, the colder the
colder the cold side gets. So I put the heat sinks on and stuck the hot side
into a bucket of ice water. The cold side got 37 degrees below zero! I realized
all I had to do was store the mirror in a box that was cold and the mirror would
be cold when ever I wanted to view. No tube currents! But how would I keep it
from getting to cold and forming dew the minute I took it out? I would have to
install a thermostat. I used a $20.00 model. It runs on two AA batteries, but
using a relay, it can switch 12 volts at 20 amps. So now I just set the
thermostat 5 degrees above the predicted viewing temperature and I am set to
view the minute I set up with no tube currents or any other temperature aberrations.
Back to The Drake