This is a good topic - for me potential DIY tube amp will depend on the tube look. I like 6c33c for its industrial rugged shape - I use it in my first DIY tube amp. I accidentally bought a lot of NOS gu32 (832 ) tubes, i like weird shape of these frogs 
I know what'll be building next.
I know what'll be building next.Attachments
Sophia Electric Royal Princess 300B
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OT:
About Peranders' last tube: 30 cm tall, for 25kV. 5kA??
I would venture to suggest a decimal point change somewhere.
Several decades ago I worked at the South African Broadcasting Corporation. For their medium wave transmitters a CAT-6 was used. It drew 1A at 10kV, was water-cooled, and stood about 1 meter tall. What is the dissipation of the Peranders example? Even if it is a "either-or" rating (it probably is) I am wondering.
(I can't recall what V.A, but the CAT-6 used a special isolated generator to supply the filament energy - it was directly heated.)
About Peranders' last tube: 30 cm tall, for 25kV. 5kA??
I would venture to suggest a decimal point change somewhere.
Several decades ago I worked at the South African Broadcasting Corporation. For their medium wave transmitters a CAT-6 was used. It drew 1A at 10kV, was water-cooled, and stood about 1 meter tall. What is the dissipation of the Peranders example? Even if it is a "either-or" rating (it probably is) I am wondering.
(I can't recall what V.A, but the CAT-6 used a special isolated generator to supply the filament energy - it was directly heated.)
I guess I would agree with the impact the tube made at the time of its introduction: KT66
Totally OT:
Post #26 reminded me of the way we used to illuminate our way at night inside the SABC transmitter houses; By simply holding a fluorescent tube (working or burnt-out) in the hand (no connection to anything, no danger). It simply got energised to almost full glow by the surrounding r.f. field.
No, it was OK. I had three sons later when married
Totally OT:
Post #26 reminded me of the way we used to illuminate our way at night inside the SABC transmitter houses; By simply holding a fluorescent tube (working or burnt-out) in the hand (no connection to anything, no danger). It simply got energised to almost full glow by the surrounding r.f. field.
No, it was OK. I had three sons later when married
My favourits,
FU13
Gu81m
FU13
An externally hosted image should be here but it was not working when we last tested it.
Gu81m
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I'm sorry, I thought the criteria for this thread was beauty and not originality?
If we were looking for the most original tube, I'd pick something completely different. There are plenty of freakish looking vacuum tubes out there.
Yeah, I used to think that tube amps should be something like an electric fireplace, glowing warmth and all. I don't feel that way now. If I want a warm glow, I'll build a fire in the fireplace, thanks.
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