Note
QST, Dec 1964, inside back cover.
QST, Dec 1965, p. 119.
QST, Feb 1966, back cover.
QST, Jun 1967, p. 168.
The VX-501 console housed the remote VFO for National’s NCX-5 transceiver. Its switching setup allowed the operator to control the frequency with the NCX-5, the VFO console, or to split transmit and receive functions be-tween the two. It also had switch positions to select from optional crystals.