Note
QST, May 1964, p. 120.
QST, May 1965, p. 125.
QST, Jan 1966, p. 105.
QST, Oct 1966, p. 129. (406B)
The 406B was the mobile VFO for the Swan 400 transceiver. It covered the American portions of the 80–15 meter phone bands and two 200 kHz segments of the 10 meter band.