FS: 2x GM100 "leviathan" Power TRIODES - diyAudio
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Old 6th March 2012, 03:29 PM   #1
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Default FS: 2x GM100 "leviathan" Power TRIODES

Hello all. Due to ongoing project with large gu81m (4 of them)

High voltage driver for AB2 operation GU81m tubes

I have to part with two gems. A lucky find from a Ryazan plant warehouse yielded 2 perfect gm100. Apparently these huge triodes are NOS but without boxes. These are the largest and most beautiful tubes on the market

Click the image to open in full size.

Photo comparison:

Click the image to open in full size.

datasheet:
-100

The filaments test fine at 12.6v

I ask 150 euros each. Buyer pays shipping. Any method of payment is accepted as long as it is secure for both parties (paypal, bank transfer).

Can arrange specific transportation methods but was thinking EMS for added safety.

For all info please email me at J22_it@yahoo.it
telephone number can be sent through PM for added guarantee

Cheers
Alessandro

Last edited by Alexontherocks; 6th March 2012 at 07:24 PM.
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Old 7th March 2012, 03:21 PM   #2
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bump. I can't believe no one is interested. If price is a concern I am sure we can find a deal.

Alex
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Old 7th March 2012, 03:28 PM   #3
jrenkin is offline jrenkin  United States
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Location: Denver, Colorado
Looks like voltage could be why there is not much interest. Best I can tell, not being able to read russian, as you would need 2000-3000volts at 100ma for these. Not for the faint of heart at $300 for the pair.
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Old 7th March 2012, 03:41 PM   #4
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yes anode voltage can get pretty high...but lower voltage will work too (allbeit with different behaviour). I know a builder should not say this but these tubes are just beautiful to put in a showcase. I am too deep inside my project to revert to the design stage but even a nice lowe power SET could be built around such a tube.

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Old 12th March 2012, 04:40 PM   #5
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bump!
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Old 26th April 2012, 12:34 PM   #6
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Guys....I got them from the warehouses and tested them for filament power..

Click the image to open in full size.

I have them here so any photos or info you might need or want I can give you. I also have a datasheet in ukrainian

Alex
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Old 26th April 2012, 03:57 PM   #7
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Old 27th April 2012, 02:15 AM   #8
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Do you have a project schematic you had in mind for these? Is there a tried design built around these already? If so, I would be interested in seeing it....
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Old 27th April 2012, 06:04 AM   #9
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There is a tried schematic in the gm70 yahoo group forum. The driver i am using for my 2kw amp (search gu81m ab2 thread) should work. As i said i am selling for funds. If i had the possibility i would use the gm100 (financial possibility). Obviously this project is NOT a plug&play style kit. This is diy forum afterall!

Inviato dal mio GT-I5800 con Tapatalk 2
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Old 27th April 2012, 06:07 AM   #10
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Ask lem8r (a diy member) for custom toroidal transformers. I had a 1700w output transformer core made for my amp per channel.
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