Larry,
The newer one's are like the DBR 600 and 360/10, but most of the used ones
would be either synchro or step driven and there are many flavors of those.
Steve

"Larry W4CSC" wrote in message
...
"Steve Lusardi" wrote in
:

Sperry Marine Gyro compass repeater


http://cgi.ebay.com/ws/eBayISAPI.dll...em=7311000 43
6&rd=1&ssPageName=WDVW

Sperry....er, ah, but I don't think it's NMEA compatible...(c;