[Xcalibur255]

That Studio Six seems like a nice amp. I've always been curious about how the 6V6 tube sounds in a single ended implementation.

 

[gibosi]

BTW they are not heat radiators but tensioners.

It's difficult to clearly see these structures on tubes with black glass. But now that I see them installed in a clear-glass tube, I would agree.

 

[UntilThen]

Thanks Ken and Stavros. I am getting an education in Brimar 6sn7. They certainly look like choice tubes. That Brimar 6sn7gty brown base I have never seen before.

 

[rosgr63]

It's difficult to clearly see these structures on tubes with black glass. But now that I see them installed in a clear-glass tube, I would agree.

Bruno my French tube mentor thought me this after many heated arguments

 

[UntilThen]

That Studio Six seems like a nice amp. I've always been curious about how the 6V6 tube sounds in a single ended implementation.

It is a very nice amp in the flesh. The quality of construction is very evident from the chassis to the sockets and smooth turning control knobs. It's the quietness of the amp and the over all tone that is even more impressive. Although rated at max 1watt, it can drive up to 4 full size headphones (planars included) with no drop in gain and fidelity.

This is the first time I'm exposed to 6v6 tubes. It sounds tight and fast unlike the Takatsuki 300b that I heard in the Woo WA5 which have a lot more bloom. However they are totally different amps and it's not a straight comparison of tubes. The 6v6gt sounded more linear, neutral with a very lively attack whereas the Fivre 6v6g coke bottle has a lot more body and lusher. However my Fivre 6v6g is new out of the box. Who knows it might tighten up with burn in.

 

[UntilThen]

There were several versions of the Brimar 6SN7GT.

https://www.head-fi.org/threads/the-6sn7-identification-guide.209782/ (Scroll down a bit more than halfway to the section on European 6SN7)

Those with black glass were the earliest and heat radiators extending above the top mica is another distinguishing feature. Even though I would describe the one you found on eBay as having smoked glass, you can clearly see the heat radiators, so it is an early one. Later tubes, with clear glass, didn't have those heat radiators.

Now I know what Brimar means.

Brimar stood for ‘BRItish Made American Range’

 

[mordy]

Now I know what Brimar means.

Brimar stood for ‘BRItish Made American Range’

Here is another opinion from Wikipedia:
British Manufactured American Radio" (valves)

 

[UntilThen]

Here is another opinion from Wikipedia:
British Manufactured American Radio" (valves)

Yet another interpretation. I thought Brimar is just a nice sounding name like Bruno.

 

[L0rdGwyn]

Here is another opinion from Wikipedia:
British Manufactured American Radio" (valves)

I was told it was British Mayonnaise American Relish, but I've been wrong before.

 

[mordy]

Test your knowledge:
What does the tube manufacturer name TeKaDe stand for?

 

[Deyan]

Test your knowledge:
What does the tube manufacturer name TeKaDe stand for?

Telefon-Apparate- Kabel- und Drahtwerke

 

[L0rdGwyn]

Waking up now from a dreaded night shift with a half functioning brain, I will roll the tube du jour to save myself from making a choice, Brimar. GOTL, bring me back to life!

 

[mordy]

Telefon-Apparate- Kabel- und Drahtwerke

Excellent!

Here is a link to a long but fascinating article about German tubes (including TeKaDe that made tubes for Telefunken) if you get tired of Harry Potter....
https://www.nonstopsystems.com/radio/hellschreiber-tubes.htm#tekade

 

[UntilThen]

Waking up now from a dreaded night shift with a half functioning brain, I will roll the tube du jour to save myself from making a choice, Brimar. GOTL, bring me back to life!

Nice collection of drivers. I have heard the Brimar 6sn7gty CY1988 black glass before but as a pair in Woo Wa5LE. It was branded as Mullard.

 

[L0rdGwyn]

Nice collection of drivers. I have heard the Brimar 6sn7gty CY1988 black glass before but as a pair in Woo Wa5LE. It was branded as Mullard.

Well that's a pretty amp. They are nice tubes, similar to the 13D1 in sound I would say, no surprise there. A member on a different forum who had done distortion measurements of many of the most popular 6SN7s told me the CV1988 had the lowest measured distortion of them all. I thought that was an interesting little anecdote.