[Yamamaya42]

Originally Posted by Kevin Kuehn

but it appears basically the same minus your set is not using the 1st audio or output tubes. It's curious that your chassis actually has the 6AT6 1st audio tube installed, but it's not being used.


https://www.flickr.com/photos/152661...57713086856613

Looking closer at the data for the 6AT6, it seems that it IS being used for something in the set.

The tube is... a “Duplex-Diode High-Mu Triode”
The diode part is being used for something, but not sure what, or how, it goes down to the contrast control, and to the tuner ( not shown on sams schematic, but I can see the wire in photo page 6 0074-3 )

not really sure what this does however