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Hello,
Here is some practical advice regarding the tube identification.
First of all: be very careful, the tube numbers engraved on the glass
are easily erased. Better leave some dirt in place than be sorry.
Your radio has at least five tubes. From the rear, two are plainly
visible, and the three others are covered by metallic shields (and
they do have a top cap connector as well).
The tubes are simply pulled straight up, but it is best to grab the tube
by the black base, otherwise it may come apart.
I would advise you to start by identifying the two tubes that have no
shields. Just grab them by the base and pull straight up, being careful
no to hit the top of the cabinet. Just hold the tube in the light, and
you should see some faint numbering on the glass. It is likely that the tube
located nearest the side of the cabinet will be marked 80, or 280, or
something similar. The other one might be 41, 42, or something else as
well.
Keep us posted about this. Once you have made it with these two tubes,
you will be able to try the other ones. This will involve the extra steps
of disconnecting the top cap connector, and removing the shield. It
may not be possible to remove the shield completely with the chassis
in the cabinet, so you might have to take the chassis out. Good luck.
Anyone who sees something important I left out, your input would be
appreciated. Regards.
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