ETX-90AT, Autostar #497, SP26mm, SP15mm, B&L 30mm eyepiece, manual, hard carry case
99% new, never took to field
Tel: 9638 3899
Interested parties please call 9638-3899
or e-mail: email@example.com
Specifications of Equatorial Head
Machined aluminum housing provides robust protection for electronics.
Dovetail construction allows quick removal from 900 and 1200 mounts.
Removable?microprocessor chip allows upgrades in future.
12V connector for locking power cable.
Connector for SBIG ST-4, ST-6, ST-7, ST-8 and ST-10 Star Tracker/Imaging Systems or any CCD with modular RJ-11-6 connector.
Two 9-pin RS-232 serial ports (DB9 female connectors) so that user can use DigitalSky Voice and a planetarium program (i.e. Software Bisque's TheSky? software) simultaneously, if desired. The user must have two COM ports available on their personal computer to use the software together.
Focus connector - for 3.5mm phono plug (JMI or Meade electric focusing motors).
Reticle connector - for guiding eyepiece with an illuminated reticle that has a 3.5mm phono plug or the cable for our own PASILL3 or PASILL4 (Polar Alignment Scope).
6 volt output accepts 3.5mm phono plugs to power Pentax 6x7 camera directly from the mount.
Northern and Southern Hemisphere switch.
GTO Keypad Controller locking connector.
GTO control box contains all of the circuitry to drive the two servo motors
and the logic required to circumnavigate the sky. This electronics box is
mounted directly on the polar axis of the 1200 and 900 mounts and is a stand-alone
unit for the 400 and 600E mount. We provide a pouch with a handle for the
main function of the servo controller is to drive the RA and DEC motors,
which are DC servos with built-in shaft encoders. The rotation rate of
the motors is controlled with a servo feedback loop. The servo looks at
the return pulses from the shaft encoders and adjusts the current to the
motor so that the rate is identical to the commanded rate (i.e. from .25x
sidereal to 1200x sidereal). The servo is digitally controlled, and the
shaft position is updated at a rate of 2000 times per second.
self collect price, delivery not included
Don't miss the chance!