tubes with the best 'glow'

[indra1]

... It's said a few per cent under filament voltage spec will extend the tube life. A few percent over spec greatly reduces it.

A study by the Technical division of VOA - Techniques-to-Extend-the-Service-Life-of-High-Power-Vacuum-Tubes.pdf

 

[triode_al]

My Quad Electrostat did glow.
I had aan OTL output transformerless design from Krihn-Hite. It was designed to give 200V in 200ohms . . .
And it sounded great on the ESL57 - untill I dropped the PU needle and I saw the arcs in the speakers . It took some time for them to slowly restore (the edges of the holes burn away or evaporate).

 

[Koifarm]

i like the glow of the FU13 and GU81.
And do not forget those nixie tubes.
And yes, i like those blue leds.

 

[CBS240]

IMHO: unlikely to be electrostatic. Balanced Armature more likely. Especially if the cone has a small rod glued in the center.

BA drivers have become "obsolete" with the declining cost of electronic amplification, but I am listening to one now.

Yes. You are correct it appears. I have not really studied on this radio model yet, so many other projects going on. House remodelling in progress, ect. One of these days though, I will get to it.🙂

 

[fiatguy85]

Played around with the night sight on my phone the other day, is that cheating? Makes for a dramatic glow picture. KT88's, 6N1P, and 5U4GB.

 

[kodabmx]

That moment you realize either you're beating the crap out of that 12AU7, or it's failing...

A cheap Chinese replacement (EDIT: PSVane isn't cheap apparently) does the trick and doesn't glow like this. It's in a regulator.

 

[jdg123]

811-10

These are enough to see your way around the room late at night 😀