Derren wrote:Remember you said there was a cap dated 1972 a later replacement? Any other later work done or even components of wrong value used maybe?
well the two valves in the line oscillator were possibly replaced late 1972. The ECL80 line discriminator and the ECC82 oscillator have been replaced by Tungsram branded valves, a 6AB8 and a 12AU7. Both valves are date coded September 1972. Tungsram was the wholesaler brand of Mullard. It's even possible these valves were fitted in 1973.
Mazda valves were sold under the Solus brand.
A close up picture of the line output transformer.