You might check out this url for some information.

http://members.tripod.com/morse_tele...ges/especs.gif

Garry WW9GT

Good luck and have fun


I've got a 1000 ohm sounder here that I'd like to operate. Is/was there as
standard/defined voltage or current used by telegraph services for the
various mechanical telegraph sounders, based on their coil resistance?

Thanks for your reply answers.

skipp025 at yahoo.com