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Old 24th January 2012, 03:12 AM   #1
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Default Any one know were to buy the fu-80 tube?

I have a gu-81m that I have built a tesla coil with, but I want to build something with a gu-80 but they are really rare, I heard about the Chinese remake the fu-80, I've seen a couple of pictures, but does anyone know were I might purchase said tube?

sorry if this is under the wrong board
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Old 24th January 2012, 04:02 AM   #2
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FU, what a fitting prefix for Chinese tubes.
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Old 24th January 2012, 04:51 AM   #3
AJT is offline AJT  Philippines
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first up?
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Old 24th January 2012, 05:20 AM   #4
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I'd keep an eye out on eBay.
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Old 24th January 2012, 08:16 AM   #5
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just out of curiosity, why would you want to use the gu80 when it is almost identical to the gu81m?

Why don't you try something different like one of those pulse tetrodes for radar use. Very high anode capability, huge current surge tollerance.
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Old 28th September 2013, 09:22 AM   #6
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I got some of these russian GU80 in original box from military stock.
The one in the foto was made in 1961 so I would say it's a collectors item.
If anyone is still interested please send me a PM with an offer.

20130927_122925.jpg

20130927_123008.jpg

20130927_123209.jpg

By the way, nice forum here.
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Old 28th September 2013, 11:27 AM   #7
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Quote:
Originally Posted by HollowState View Post
FU, what a fitting prefix for Chinese tubes.
This was a good one.

Seems the FU acronym stand for Foreinger Unit.
The FU5 was the 805, so the FU80 may be the 800 tube (or not).
http://www.mif.pg.gda.pl/homepages/f.../049/8/800.pdf
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Old 28th September 2013, 11:51 AM   #8
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On a brevis googled appear two options avaliable:
Aliexpress.com : Buy Medical equipment smcp fu 80 tube amplifier hi fi amplifier from Reliable hi fi amplifier suppliers on taojinmall.

Taobao Agent Bold fu-80 tube 199 yuan a - US $ 41.80
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Old 28th September 2013, 11:55 AM   #9
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This is your lucky day GU81 also avaliable from a reliable seller:
''GSTube.com''. Tubes, sockets etc. Search result for <u>gu81</u>
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