The Yaesu FT-ONE is an all-mode (CW, SSB, AM, FSK, and FM) solid state general coverage HF amateur radio (HAM) transceiver.
Mechanically the FT-1 is very well built; at the time Yaesu claimed it to be the top-of-the-line in the amateur radio segment.
A modification to the standard programmable ROM allows continuous transmitting from 1.8 up to 30 MHz by cutting a wire jumper.
All components are mounted on easily accessible glass epoxy circuit boards.
Yaesu introduced circuit modifications in the later production series to improve on the issue, but was not able to completely fix the problem as the underlying concept remained unchanged.