External-/Remote-VFO for the Heathkit SB-101/Heathkit SB-102 transceivers, designed to permit split frequency operation.
Estimating the value of a rig can be challenging. We collect prices paid by real hams over the years to help you estimate the value of a used Heathkit SB-640. Just bought or sold this model? Let us know what you traded it for and help other ham operators!
These estimates are based on the following prices: