6550-6550A-6550B-6550C - What are exactly Differences ??

tiefbassuebertr · 29th July 2011, 11:00 AM

Sound differences by tubes of same type from different manufacturers are good known and not to find by compare of the individual data sheets.
But the same is to observe by the various suffixes of the 6550.
Who knows the exactly differences and the mean of "A", "B" and "C" (6550C comes only from Svetlana as I know) ?

Zero Cool · 29th July 2011, 11:36 AM

My understanding is that the B and B2's were not very stable tubes. the C's are much better.

WildOne · 29th July 2011, 02:52 PM

OK,

What about the ones that I have that say?

6550R
Or the ones that say?

6550/WE

Not sure what they stand for?

Thanks
WO

29th July 2011, 11:00 AM	#1
tiefbassuebertr diyAudio Member Join Date: Jul 2005 Location: D-55629 Schwarzerden	6550-6550A-6550B-6550C - What are exactly Differences ?? Sound differences by tubes of same type from different manufacturers are good known and not to find by compare of the individual data sheets. But the same is to observe by the various suffixes of the 6550. Who knows the exactly differences and the mean of "A", "B" and "C" (6550C comes only from Svetlana as I know) ?

29th July 2011, 11:36 AM	#2
Zero Cool Audio Junkie diyAudio Member Join Date: Sep 2004 Location: MN	My understanding is that the B and B2's were not very stable tubes. the C's are much better. __________________ It's not about what you can BUY...It's about what you can BUILD!

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29th July 2011, 02:52 PM	#3
WildOne diyAudio Member Join Date: May 2011 Location: Great NorthWest	OK, What about the ones that I have that say? 6550R Or the ones that say? 6550/WE Not sure what they stand for? Thanks WO

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