View Full Version : Interesting (or just plain weird) Valves
The Grand Wazoo
19-05-2009, 13:25
So, what valves have you got, or come across that are not like anything else you've ever seen?
1538-P1 strobotron.
A very small dome shaped 9-pin valve
Pics & info here: http://www.tubecollector.org/1538-p1.htm
A couple of years ago I sold 3 of these for a very pleasantly high price to a great gent in the States who had been trying for years to find some spares for his old machine.
They're a very high speed flash device (high speed in the sense that the flash period is very short) used in a 'Strobotac' which is a piece of gear for measuring very high speed motion - (no bowel or toilet jokes please)
http://www.tpub.com/neets/book16/67c.htm
So, what valves have you got, or come across that are not like anything else you've ever seen?
Pics & info here: http://www.tubecollector.org/1538-p1.htm
After 30 years involvement in electronics research, I have come across and used many unusual 'valves'. These were not the devices that people usually think of as valves, rather they were photomultiplier tubes, microwave magnetrons and klystrons and devices used to measure very low pressure levels (that is, a vacuum). None of these, apart from the photomultipliers, looked like the glass devices that are mystically worshipped by some members. :)
The web site you quote is very useful and interesting. I occasionaly use it inter alia for information on audio valves.
Regards
Barry
These are pretty cool :smoking:
http://www.tubecollector.org/150-6g.htm
http://www.youtube.com/watch?v=Rt-a8fxgtno
http://www.youtube.com/watch?v=KGb-nUK41tc&feature=related
http://www.youtube.com/watch?v=B5NJQXy-qFU
The Grand Wazoo
20-05-2009, 23:10
That's a bit of a beast!
Did you ever dabble with this stuff................
http://www.youtube.com/watch?v=Zi4kXgDBFhw&feature=related
http://www.youtube.com/watch?v=lSAExHBrfwU
http://www.youtube.com/watch?v=SlNGKly09CQ&feature=related
http://www.youtube.com/watch?v=Opf5jIukSBM&feature=related
That's a bit of a beast!
Did you ever dabble with this stuff................
http://www.youtube.com/watch?v=Zi4kXgDBFhw&feature=related
http://www.youtube.com/watch?v=lSAExHBrfwU
http://www.youtube.com/watch?v=SlNGKly09CQ&feature=related
http://www.youtube.com/watch?v=Opf5jIukSBM&feature=related
Many years ago Fane made an ionic tweeter which had an incredible frequency response. Bowers and Wilkins used it in their P2 speaker. There was no arcing involved, so no light show! :(
For their next loudspeaker B&W replaced the Fane unit with an electrostatic tweeter: the DM70.
Barry
The Grand Wazoo
21-05-2009, 00:37
Yup, I smelled a pair of those Fanes once!!
.....and I've always thought the DM70's were just great. It's a shame they've been overshadowed by the Quads because they really were special in their own way.
Yup, I smelled a pair of those Fanes once!!
No doubt they would be banned today, what with health and safety and modern EU CE regulations.
Regards
Barry
Calling Steve (SPS), Ali Tait, Steve the Shadow, etc, whaddya make of these babies (scroll down to the third picture):
http://www.hififorum.nu/forum/topic.asp?TOPIC_ID=70704&whichpage=5
I presume they're triodes? Now I'd buy those puppies just to look at them! :eyebrows:
Does anyone know anything about them?
Marco.
Calling Steve (SPS), Ali Tait, Steve the Shadow, etc, whaddya make of these babies (scroll down to the third picture):
http://www.hififorum.nu/forum/topic.asp?TOPIC_ID=70704&whichpage=5
I presume they're triodes? Now I'd buy those puppies just to look at them! :eyebrows:
Does anyone know anything about them?
Marco.
The amplifiers shown are single ended designs using Eimac 450TH directly heated transmitter triodes. They produce 160w.
Single ended 160w amps! - better tell Ali (Tait). Downside? - none, apart from costing $55,000 a pair!
Regards
Barry
Ali Tait
25-05-2009, 19:22
Fantastic aren't they? It's a DHT called the 450TH.Don't know much about them,but your probably looking at 100 or more watts single ended! :smoking:
EDIT-Found this- http://www.mif.pg.gda.pl/homepages/frank/sheets/090/4/450TH.pdf
Ali Tait
25-05-2009, 19:24
I'll tell Michael Eavis about them.You could run Glastonbury with a few of these! :)
Now *that* is probably something which could lure me away from my Copper amp - if it has 'balls' as well as the stereotypical SET 'niceties' then I'm in there! We can worry about the price later :eyebrows:
Seriously, though, low-power is the thing that turns me off most about SET, as most amps I've heard sound 'lacklustre' in comparison to what I'm used to. I'm loving 30W Class A p/p into my 96db 15" Tannoy Reds... I'm not into the 'weedy' low power/high efficiency speaker route - I'm into high power/high efficiency!! :gig:
So I'd run those Eimacs with my Tannoys, no worries. Feel the force, baby, and get a tan at the same time! :lol:
Marco.
So I'd run those Eimacs with my Tannoys, no worries. Feel the force, baby, and get a tan at the same time! :lol:
Marco.
The heater dissipation alone is 90W/ triode, and of course for optimum performance you would be expected to have these amps constantly powered up. Clearly Marco, you aren't too concerned about global warming!:eyebrows:
Barry
Ali Tait
25-05-2009, 20:04
Or your electricity bill!
The heater dissipation alone is 90W/ triode, and of course for optimum performance you would be expected to have these amps constantly powered up. Clearly Marco, you aren't too concerned about global warming!
Yes, but just think how much electricity I'll save by not having to use the toaster in the morning! ;)
Bloody awesome valves, though...
Marco.
Have a look at Josh's site, when DIY becomes full time.
Also look at his front horns and drivers..
http://electronluv.com/html/amplifiers/My%20Gallery/index.html
Nice link, Will!
Now these are just 'ice cool':
http://electronluv.com/html/amplifiers/My%20Gallery/index.html
:smoking:
Marco.
They look like something out of a Jules Verne novel or maybe Flash Gordon.
Barry
The Grand Wazoo
25-05-2009, 21:59
Did you guys see this thread - ???????????
Check out all of the links!!
http://theartofsound.net/forum/showthread.php?t=2833
Yep I did, Chris, but forgot all about it! I'll merge this lot into your thread later :)
Too busy listening to music at the moment!
Marco.
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