How to interface your Yaesu FT-817ND/FT-818 radio with a Hardrock-50 HF amplifier

A Yaesu FT-817ND hardrock interface allows automatic band switching of the Hardrock-50 HF amplifier via FT-817ND and FT-818.

Yaesu FT-817ND/FT-818 PowerPole Adapter

The YAESU FT-817ND PowerPole Adapter protects against dangerous mechanical stress exerted on the DC input connector when operating portable.