Join Date: Jun 2006
Thanked 2 Times in 2 Posts
Rep Power: 13
Sorry, I have a Seafarer III that is the even older cathode ring model (still works), but I had no idea they stayed in business until the '80s.
150 KHz transponders should be available. Maybe you should try wiring the connector from the old transducer to one.
LCDs should be available at hobby shops or electronic surplus places. Short of that, try eBay.