|The Hallicrafters HA-20 VFO was
manufactured in 1968 as a matching accessory to the Hallicrafters
SR-400 Cyclone transceiver. It has dual receive capabilities for
great DX operation. It is 7 inches high, 10 inches wide and 7 inches
deep. The SR-400 and the HA-20 VFO were reviewed in the October
1968 QST magazine.