[Arran]

I have three of the Canadian versions of a 46-420, or their successor models, none of which used a 50B5 tube, however two have a XXD/14AF7 mixer oscillator, and two IF amplifier tubes, whilst the third uses a 7A8 octode converter tube and has a tuned RF amplifier stage ahead of it, and is followed by a single IF amplifier tube, I don't think that any of mine used a 35Y4, or a 50A5 but I will have to look. I thought it was some of the later versions of these that used 7 pin miniature tubes, not the earlier ones? It seems that these sets were like the 1201s, they were slapping them together with whatever parts they could get in a given week.
Regards
Arran