VFO only works with the FT-101.
The VFO 1000 / FT-101 is a Direct Digital External
VFO for all Yaesu FT-101 models except the FT-101Z and
FT-101ZD. It provides the VFO function of the
FV-101B, with the extreme accuracy and stability
of modern digital techniques. There is no
installation except to plug it into the External VFO
connector on the FT-101. A separate PTT
connection is required to use the RIT function, but is
not required for normal VFO operation. Each band
can be easily calibrated to compensate for aged
crystals in the transceiver. Once that is done,
you will never again be told that you are off
frequency. There are a total of 14 bands so the
3 extra bands could be used to display the bands of a
transverter. The LCD is backlit. Power is
from the FT-101.
EVEN IF YOU DON'T WANT A SECOND VFO, YOU CAN USE THE
VFO 1000 AS YOUR PRIMARY VFO, AND ENJOY THE ACCURACY
AND STABILITY OF THE LATEST DIGITAL TECHNOLOGY.
JUST SWITCH THE FT-101 TO EXTERNAL VFO FOR BOTH
RECEIVE AND TRANSMIT.