Finally figured out how to get a 1 kw single element transducer hooked up to my 1870/1871f sonar. I used a sitex 250c/50/200st (old fuji 8 pin metal connector) and connected to an adapter, 8 pin metal fuji to 10 pin furuno (adapt-8-10). The the new 8 pin fuji cx does not have an adapter so I sent my transducer to radarsonics and they installed an old metal connector at no charge.