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From: rseymour@wolfenet.com (richard seymour) I am sorry to say that it is impossible (or very, very difficult) to build a 506 cable for an ETX-60at telescope. The 506 cable contains active electronics, not simply wires. If you have a 495 Autostar (with numeric keypad), then it is easy to build a type 505 cable. There are references under http://www.weasner.com/etx/autostar_info.html showing how. Look for "505" and "cable". And a list of pinouts is at the bottom of this message. good luck --dick Autostar End of 505 connector cable -- rj10 (the smaller "Handset" size) +-----------+ 1- Data TO Autostar | 1 2 3 4 | 2- Data FROM Autostar +---+ +---+ 3- not used |___| 4- ground Hole in Autostar 1- Astar Rcv: data -to- Autostar (PC pin 3) (25/2) +-----------+ 2- Astar Xmt: data -from- Autostar (PC pin 2) (25/3) | 4 3 2 1 | 3- not connected +---+ +---+ 4- ground reference (PC pin 5) (25/7) |___| PC Serial connector (pins) 2- data to PC, 3- data from PC, 5- ground ---------------- \ 1 2 3 4 5 / \ 6 7 8 9 / ---------- Looking at holes on end of 505 cable --------------- \ 5 4 3 2 1 / \ 9 8 7 6 / ------- Solder tails of db9 connector ---------------- \ 1 2 3 4 5 / \ 6 7 8 9 / ---------- This is what i consider the BEST drawing of how to wire the 505 rs232 cable (from AJerzewski@aol.com):Dick
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