QST, Jul 1957, p. 165.
The model 8020 VFO-Matic plugged into a Collins 75A-2, -3, or -4, and then used the receiver's PTO to control the frequency of a phasing-type SSB transmitter having a 9 MHz mixer frequency. The 8020 worked on 75 and 20 meters.
References
Review. CQ, Sep 1958, p. 63.
