It's a 15W CW/10W AM transmitter for 7/14 MHz.
ECC81 - VFO on 3.5MHz
EF89 - Buffer
EF89 - Multiplier to 7 MHz
EF89 - Multiplier to 14 Mhz
EL86 - Final with pye tank
Has an outboard power supply cum modulator.
ECC83 - Speeech Amplifier
EL84 - Modulator
My design manuscripts:
Could work a lot of DX on CW (including one from 'W' land on 40m) in the late 1970s.
AM DX contacts were with 4S7 and YB0 stations.
Antennas used were simple dipoles.