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I see that people sometimes want to build tube amps because they glow, it’s part of the fun. I noticed my 6AS7 tubes have a clear view to the hot cathode and so it puts on a nice show. I have a family member attracted to the idea of building a tube amplifier and I know the appearance is part of the attraction of it. Perhaps it’s an additional factor in getting a younger generation interested in the art. But which tubes offer the best ‘glow’ ? - and without recourse to sticking an LED underneath it.
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I built a little SE 6l6 / 6sl7 amp out of lexan that looks pretty cool with the B+ on. The 6l6’s are old Sylvanias that I plucked out of an old X-ray machine in the junkyard. They have a nice glow but one is definitely brighter. Don’t know why.
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