Note
QST, Nov 1971, p. 160. (sometime before this)
QST, Apr 1972, p. 160.
QST, Dec 1975, p. 149.
The RV-4 remote VFO controlled the transmit, receive, or transceive frequency of the TR-4. It could also be switched offline, returning control to the TR-4’s PTO. The RV-4 was solid-state with the exception of a VR tube and cathode follower.
RV-4C
Date assumed to be 1972 -- matching the release of the TR-4C.
QST, Jan 1976, p. 91.
QST, Mar 1976, p. 113.
QST, Dec 1977, p. 155.
The RV-4C remote VFO for the TR-4C could be used with older TR-3 and TR-4 transceivers as well. It con-trolled the transmit frequency, the receive frequency, or both. The unit used a solid-state PTO and a 12AU7 cathode follower. The RV-4C had a built-in 5 inch speaker and had room for the transceiver’s AC-4 power supply; $110.00,.
