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07-20-2012 Post does not mapped to Knowledge Tree
Lyon, France
Posts 138
Joined on 05-29-2004

Post #: 1
Post ID: 18428
Reply to: 18428
Tube GU-29
Hi Romy,
Do you have experience with this tube ? I have seen it for first time in german amplifier recently and am curious.
R weissman
07-21-2012 Post does not mapped to Knowledge Tree
Romy the Cat

Boston, MA
Posts 9,768
Joined on 05-28-2004

Post #: 2
Post ID: 18431
Reply to: 18428
Another beam tetrode for high power SET?
Nope, I am not familiar with sound or applications of this tube. It is indirect heated beam tetrode – why would it be any different from the whole family of beam tetrodes?  From my perspective it might be interesting for ULF DSET solution as it has a lot of power but I do not think your German people use it for DSET configuration. You know my answer to it: instead of rising power in full-band amplification I tend to advocate raising sensitivity of loudspeakers.

"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
07-21-2012 Post does not mapped to Knowledge Tree
Gdansk, Poland
Posts 502
Joined on 01-07-2006

Post #: 3
Post ID: 18433
Reply to: 18428
40W max plate power diss. is not impressive and for sure a joke for a serious high-power set.
I remember doing some intellectual excersise/pspice sims of a DC coupled GU81M.
Much more serious tube and IIRC on the sims it looked promising. Search the site and
contact me if you'd like to try the design (i'd need +/- 200yrs to get to it Wink

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