eHam

eHam Forums => Station Building => Topic started by: N6JSX on December 04, 2000, 07:14:09 PM



Title: Looking for surplus synchro's
Post by: N6JSX on December 04, 2000, 07:14:09 PM
I'm an old Navy salt and my fire control system used many TDR/TDX/CT 120VAC 60 Hz synchro's. I would like to find some of these synchro's to build a quick antenna rotor system. Sure would like any suggestions/sites help?
TNX, Kuby


Title: Looking for surplus synchro's
Post by: K4ZA on January 16, 2001, 09:01:30 PM
several selsyns were on eBay lately....  
cf. page 24 current Fair Radio catalog...
although perhaps these are not large enuff--you do say rotator, rather than rotator indicator...?


Title: Looking for surplus synchro's
Post by: K3UOD on May 07, 2001, 08:40:44 AM
I'd love to find a few synchros to play with also.  To the uninitiated, synchros come in 2 varieties, torque and control.  The torque receivers can turn a light load (like a dial or a pot) directly.  Control transformers are used for position sensing.  They determine the difference between the ordered position of a load, and it's actual position.  The difference is called the "error signal".  The error is fed into a servo amplifier, which in turn, drives a motor which moves the load.  This is how you can control the movement of a huge 16 inch gun turret on a battleship by twisting a small knob.

Kuby, e-mail me at k3uod@hotmail.com and let me know what ships and systems you worked on in the Navy.

73
Jerry Golabowski, FCC(SW), USNR (ret)


Title: Looking for surplus synchro's
Post by: KL7IPV on May 07, 2001, 05:40:18 PM
You might also try to look on WWW.surplussales.com  They have a lot of nifty stuff there and I wouldn't be surprised if he had exactly what you want.
73,
Frank
KL7IPV