mhardy6647
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Alas, on my SET amps, the tubes are turned 90 degrees so the plates are viewed edgewise from the front. I wouldn't be able to see the light show even if I bought those 2A3s.
I mean, you could reorient the sockets -- or just turn the amp 09 degrees, you know?
To get this back on topic the optical coolness of various vacuum tubes should be measurable and quantifiable.
Kinda hard to beat thoriated tungsten filaments and mercury vapor regulators in this regard -- although, I, too, am a sucka for the blue glow.
DSC_0001 by Mark Hardy, on Flickr
in full disclosure, the photo above, of a very cheap ValveArt (Chinese) 2A3 of the late 1990s, was taken by my son, not by me.