[TenTec] ooops!

[Stuart Rohre]

Art,
I would not think a tube would have a smell if it arced, unless it was 
an external arc at the pins.

My bet would be a capacitor having shorted, such as the one from the 
final active devices to the band tune network.  Or it could have been a 
capacitor elsewhere.  Of course, if a strong burned smell, look for 
arced insulation or a burned resistor.  A magnifier and strong task 
light can be helpful in crowded circuits.

GL,
Stuart Rohre
K5KVH