[R-390] 26Z5W Failure

[Gene Dathe]

Steve wrote:

It is possible to loose one 26z5 at an earlier time and the radio operate
normally. Each tube has two cathodes and two plates (four plates and four
cathodes total). Both high tension leads from the power transformer are
shared by each tube. If one tube goes dead, there is still full wave
rectification.
...73..Steve...N8YE

Yikes, that's not the radio I have..!  The plates of each tube are connected 
in parallel (pins 1 and 6).  Each tube is connected separately to either 
side of the center-tapped secondary.  So each tube is a half-wave rectifier, 
fed through L601 and fiter cap C606A.  Lose one tube and you have a half 
wave rectifier...

The responses I have gotten (Thanks, all,) seem to indicate that both tubes 
go at once.  Anyone blow just one? Or just too much current in the remaining 
tube?
73 de NA0G  Gene