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Fivre 6SL7 tube - sound profile / recommendation / comparisons [message #95829]

Wed, 13 July 2022 03:11

kasperbergholt
Messages: 44
Registered: August 2021
Location: Copenhagen, Denmark

Baron

Clever people,

Inspired by the excellent feedback (e.g. on the E80 CC tube having quite different
specs from the ECC82) the I got in this thread:

https://audioroundtable.com/forum/index.php?t=msg&th=23320&goto=94872&

and general recommendations for ECC82 tubes he:
https://audioroundtable.com/forum/index.php?t=msg&th=23320&goto=94872&

some new questions have shown up in regards to a pair of NOS 6SL7GT tubes from the Italian producer Fivre I've come across.

They're close to perfectly symmetrical, which I'm fond of, both across tubes & triodes, picked from Hungarian military stock.

I've tried learning more about Fivre's sound profile / characteristics, but information is sparse (especially in comparison to the usual suspects from Telefunken, Mullard, RCA, Sylvania, Siemens, Amperex, TungSol, etc.).

So I'm hoping to find some valuable insights / information here.

They'd be used in the preamp stage of my Audio Note P2SE amplifier.

Thanks in advance,

Kasper Begholt

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Re: Fivre 6SL7 tube - sound profile / recommendation / comparisons [message #95831 is a reply to message #95829]

Wed, 13 July 2022 21:16

gofar99
Messages: 1947
Registered: May 2010
Location: Southern Arizona

Illuminati (5th Degree)

Hi I have not heard any of them so it may be interesting to see if anyone has some thoughts on them. I like to use NOS National Union and Sylvania made for the US Navy in the 1943-46 year range. My preferance is for the 12 volt versions as they lend themselves to my designs easier though.

Good Listening
Bruce

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Re: Fivre 6SL7 tube - sound profile / recommendation / comparisons [message #95836 is a reply to message #95831]

Thu, 14 July 2022 09:47

kasperbergholt
Messages: 44
Registered: August 2021
Location: Copenhagen, Denmark

Baron

gofar99 wrote on Wed, 13 July 2022 21:16

Hi I have not heard any of them so it may be interesting to see if anyone has some thoughts on them. I like to use NOS National Union and Sylvania made for the US Navy in the 1943-46 year range. My preferance is for the 12 volt versions as they lend themselves to my designs easier though.

Thank you for the reply. NOS Sylvania tubes seem popular.

These are from 44-45
https://www.ebay.co.uk/itm/174954323484?hash=item28bc171e1c:g:qToAAOSwW61hUHxb

Might be worth a try Smile

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