Re: Pilot PT650 "Spacemaker" Television
Two examples of valves that were made by Mazda and marketed by Mullard. A 30PL1 and a 6F23. These have been given pro-electron codes and are designated PCL801 and EF812. Note the "U" symbol to the right of the type numbers, this indicates that the valves were sourced from a third party rather than from Mazda.
DFWB.
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