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Old 11th November 2003, 04:12 AM   #1
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Default New tube project done in a BIG way

Here are some parts I've gathered together for my next tube project. Gee.... let me think.....maybe a headphone amp yea a 250 watt RMS headphone amp.
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Old 11th November 2003, 04:39 AM   #2
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Uhm, I think the last time I saw one of those things it was AM modulating around 90 Khz into a three tower daytime directional array. To say it glowed was an understatement. That sucker was bright.
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Old 11th November 2003, 04:45 AM   #3
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Well as a RF transmitter, it ranges 1.7Kw or less depending on the range of plate voltage of 7500v or less. Tube life estimates of about 30 years at plate voltages of 5KV running 1.5kw. As an audio amp tube, it can run 200-250 RMS for a single tube. Filament transformer alone runs 7.5V @ 21A. That's the reason for a air cooling socket, chimney, and heat cap.
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Old 11th November 2003, 05:18 AM   #4
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WOW! You really are building an AF amp out of it. I thought that you were pulling out legs.

Gonna do two mono blocks?

Thanks for sharing and please post your progress.
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Old 11th November 2003, 05:53 PM   #5
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Geez... right up there with my PP 4CX250R linear idea... but that's if I ever get a radio license. Might as well burn some speakers instead I guess

Tim

(I know, shown is a 4X150A instead... the CX's are in the basement )
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Old 11th November 2003, 08:54 PM   #6
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Hi wardsweb,

look, I have almost the same tube as You (Siemens RS1091N75).

It`s a defective part from an induction dental melting machine. I took a look inside when the service technician changed the tube and some other parts in the machine .... a really scary piece of high power apparatus!.

They wanted to trash the tube but I found it`s a pity about this nice piece and I took it home and made a lamp out of it.
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Old 11th November 2003, 09:19 PM   #7
tiroth is offline tiroth  United States
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Nice!
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Old 11th November 2003, 10:40 PM   #8
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This one is more fun...

http://gilmore.chem.northwestern.edu/powertube.jpg

too big for the filesize limit
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Old 11th November 2003, 10:43 PM   #9
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A klystron? a bout 2 Kw?
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Old 11th November 2003, 10:55 PM   #10
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Quote:
Originally posted by kevin gilmore
This one is more fun...

http://gilmore.chem.northwestern.edu/powertube.jpg

too big for the filesize limit

Man, that's bigger than the 4CX1000 and socket sitting in my fathers basement!
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