[Badas]

I'm toying with the idea of going to 6F8g's with the adapters now I've had my WA22 for a while now.

If I was going in that direction what would be the most mellow tube? Not bright. I don't mind a rolled of treble.

 

[Nic Rhodes]

For TS, round plates are best there are however many fine 6F8GS that are not round plates however with all all you need to watch noise levels.

 

[punit]

I'm toying with the idea of going to 6F8g's with the adapters now I've had my WA22 for a while now.

If I was going in that direction what would be the most mellow tube? Not bright. I don't mind a rolled of treble.

I have heard TS, Sylvania & National Union 6F8G's. The NU's were the most smooth.

 

[rosgr63]

The NU round plates and the Raytheon 6F8G's are very nice tubes.

 

[r one]

Hi there
 
i'm a new consummer of 6f8g and 6sn7 tubes (with a lot of pleasure) since i've bought my first amp tube : the balancing act.
I like to understand things and I have a technical question for you about the round plate system.
What is his interest? It brings benefit to the tube? it changes the nature of sound? fiability of the tube? the longevity of the tube?
 
 Actually i've got a Tung sol 6SN7GT bgrp / mullard ecc35/ TS 6f8g-VT99 flat plate (my favorite) for rolling my BA . I've just found and bought 2 NOS Tung Sol 6f8g VT99 round plate. I'll sounding like my VT99 flate plate or there will be a different sound ?

 

[Stereolab42]

 
 Actually i've got a Tung sol 6SN7GT bgrp / mullard ecc35/ TS 6f8g-VT99 flat plate (my favorite) for rolling my BA . I've just found and bought 2 NOS Tung Sol 6f8g VT99 round plate. I'll sounding like my VT99 flate plate or there will be a different sound ?

 
Please give us a report once you get your round-plate and can compare them!

 

[r one]

i'll do. Tubes may arrive this week probably.

 

[r one]

tubes arrived this morning. I'll test and compare them between flat and round plate version of the same tube. I'll tell you if they sound different.

 

[r one]

Good evening, i've tested the two versions of the tung sol 6F8G VT 99. It appears that round plate version and flat staggered plate version sounding exactly the same for me. with my 2 cans (w3000 or TH900). With the Balancing Act, it brings me dynamic sound and deep bass with high clarity (like loundness type sound). It's the preamp tube i prefer with this marvellous amplifier. When i'm wanting more control and smooth sound in the high frequency, i prefer use the Tung Sol 6SN7GT BGRP more neutral : one for morning listening and one for evening listening.

 

[Stereolab42]

  Good evening, i've tested the two versions of the tung sol 6F8G VT 99. It appears that round plate version and flat staggered plate version sounding exactly the same for me. with my 2 cans (w3000 or TH900). With the Balancing Act, it brings me dynamic sound and deep bass with high clarity (like loundness type sound). It's the preamp tube i prefer with this marvellous amplifier. When i'm wanting more control and smooth sound in the high frequency, i prefer use the Tung Sol 6SN7GT BGRP more neutral : one for morning listening and one for evening listening.

 
Interesting. So you actually hear a difference between the 6SN7 and 6F8G versions of the Tung Sol? I thought they were supposed to have exactly the same internals.

 

[r one]

Yes, i hear a difference between Tung Sol 6F8G bgrp and 6SN7GT bgrp. both versions are very close, in the same way, but they sound different anyway.
6SN7GT is the latest evolution of 6F8G. I don't know if its exactly the same characteristics between the two versions.

 

[mcandmar]

I must try a Tung-Sol, of the 6F8G variants my favorite was the round plate National Union, it excelled in euphoric warmth and dynamics.  The newer the tubes, i.e. flat plate 6F8G > flat plate 6SN7GT's > angled plate 6SN7GTBS > 6CG7/6FQ7's i found the sound gets cleaner and more refined. But there is something about the round plate 6F8G's that just sounds so good, each have there place IMO.

 

[r one]

actually, i've heard TS 6F8G flate square plate and round plate/TS VT231 bgrp/ECC35 mullard and TS 6SN7 GTB(stock tube for the BA). My favourites flavours are 6F8G and VT231 BGRP version.
 
What is the current reissue tube the closest to this NOS for you ?

 

[Stereolab42]

Alright, I'm finally set up with 6F8Gs. I have RCA and Tung-Sol flat-plate VT-99s, and a couple Tung-Sol round-plate VT-99s on the way. The hardest part was finding working adapters. The first ones I tried has noise issues apparently due to grounding. They were based off the now-ubiquitous ceramic/brass savers that usually work well, except in this case. I then surmised that I should be looking for all-plastic adapters, and these ones did , with no more noise at any volume than 6SN7s:
 

 
 
http://www.ebay.com/itm/171555247064
 
So far both the RCAs and T-S FPs sound great. As long as you get the right adapters they make excellent 6SN7 substitutes.

 

[TonyNewman]

  Alright, I'm finally set up with 6F8Gs. I have RCA and Tung-Sol flat-plate VT-99s, and a couple Tung-Sol round-plate VT-99s on the way. The hardest part was finding working adapters. The first ones I tried has noise issues apparently due to grounding. They were based off the now-ubiquitous ceramic/brass savers that usually work well, except in this case. I then surmised that I should be looking for all-plastic adapters, and these ones did , with no more noise at any volume than 6SN7s:
 
 
 
 
http://www.ebay.com/itm/171555247064
 
So far both the RCAs and T-S FPs sound great. As long as you get the right adapters they make excellent 6SN7 substitutes.

 
Nice!! Are those SERPs in the 300B slots?
 
If yes, what are your impressions of them?