Originally Posted by 125Miles
You can rebuild
it yourself. DMI use to sell kit to replace wind
speed sensor. To get directional vane working you need new “motor” servo transmitter 11tx-300-b-100d 400Hz made by Harowe servo controls. Its quite hard to find these days. Any other servo with rotor (input) 1 phase 26v,
stator (output) 3phase 11.8 v will work but it might have shaft that is too short to put the vane on. Here is one from Kearfott but it needs some sort of shaft modification/extension Kearfott R510 1A Synchro Control Transmitter 400Hz | eBay
This is a bit of an old post but I hope my recent discovery is of some help to someone.
Turns out used "servo transmitters" aren't so rare after all. Find another gauge for a little as possible (ebay is a good source) and tear it apart. You will find that the syncro transmitter(in the mast
head) and receiver(in the gauge) are exactly the same. A little bit of research
(Synchro - Wikipedia, the free encyclopedia
) some mechanical work and a bit of soldering and you can be back in business in no time.