04-06-2017, 05:20 AM
If the 5AZ4 tube is blown there might be a reason for it, don't try powering it up without checking for a shorted filter cap first. The model number is probably a Philco Products of Canada model number, which is why you can't find it online, but it may be listed in the RCC manuals.
Regards
Arran
Regards
Arran