Again, I do not have the schematic so I cannot read what you are
quoting.

http://www.nostalgiaair.org/Resources/451/T0000451.htm

Look here. There are several to choose from. Perhaps there is a run or
version number to be had. Start with the first H104.

http://www.nostalgiaair.org/PagesByM...3/M0024073.pdf This page
identifies the different suffixed chassis. A tube change.



Paul P.