18-07-2023, 07:42 PM
The replacement mains transformer has been fully wired into the circuit. A Mazda UU4 HT rectifier fitted. Time to apply full mains to the receiver. Took quite a while for something to appear on the screen, the Mazda U21 EHT rectifier is of the slow warm-up type. As can be seen from the attached pictures the frame timebase needs attention. The T41 gas thyratron and PEN45 valves are OK so some serious fault finding is called for.
The Mazda CRM71 is excellent.
Interesting to note that this made in 1938 TV set has a standard Belling-Lee aerial socket.
Geordie McBoyne.
The Mazda CRM71 is excellent.
Interesting to note that this made in 1938 TV set has a standard Belling-Lee aerial socket.
Geordie McBoyne.
