[cddc]

Try 6C8G. Basically the same as 6F8G but with more gain. Way cheaper also.

Cool...I will see if my amp can take them. Thanks a lot!

 

[mordy]

Yip. They can be cheap.

I purchased some beautiful Tung-Sol roundplates NIB for US$30.00 a pair.
They sounded exactly the same as the 6F8G at $150 a pair.

I also picked up a box of 100 RCA's 6C8G for $50.00. They sounded good as well.

I have several different brands of the 6F8G and the 6C8G. IMHO the National Union sound the best.

 

[Badas]

I have several different brands of the 6F8G and the 6C8G. IMHO the National Union sound the best.

Yeah. I am the same. I have TSRP and NU in 6F and 6C. I put TS and NU at first equal.

There is suttle differences between them. TSRP has a warmer mid range but the NU has the sweetest treble I have heard. Pick your poison.

 

[tintinsnowydog]

Roughly what time period were the GEC 6AS7G labelled as Osram or labelled as Marconi? Are the black curved base Marconi ones older/from a different factory than the brown straight base?

 

[gibosi]

Generally, older tubes, manufactured in the late 1940's and early 1950's, are labeled Osram or Marconi, and later tubes are labeled GEC. The brown base was introduced in the early to mid 1950's, and the black base was standard before then. However, all these tubes were manufactured in the Hammersmith factory. And therefore, the label and the color of the base are not important other than as a rough indicator of the date of manufacture.

In my opinion, since the base was added after the tube itself was manufactured, the shape of the base likely corresponded to the end-user's requirements, maybe something as simple as to accommodate bottom-mounted sockets versus top-mounted sockets. Whatever, the shape of the base has absolutely no effect on how the tube sounds.

 

[Toad_of_Toad_Hall]

Is anyone aware of any 6AS7Gs or functional equivalents that were manufactured in Australia?

 

[mordy]

Is anyone aware of any 6AS7Gs or functional equivalents that were manufactured in Australia?

Everything is possible but can’t remember seeing any from AU. US, British,Russian, Chinese and Japanese; yes.
If you go to 6080 tubes there are more countries of origin.

 

[JKDJedi]

Any knowledge of these two here in the forums? Just got the Sylvania 7236 here and seems like it might match up with the Tung Sol 7236, the latter (Tung- Sol) appears to have a higher amplification.

 

[mordy]

Any knowledge of these two here in the forums? Just got the Sylvania 7236 here and seems like it might match up with the Tung Sol 7236, the latter (Tung- Sol) appears to have a higher amplification.

The amplification factor is 4.8 compared to 2 for a 6080 tube. Don't know if it makes much of a difference in terms of noise - it should just sound a little louder.
If a 7236 tube is up to spec, it should have the same amplification no matter which brand.

 

[JKDJedi]

The amplification factor is 4.8 compared to 2 for a 6080 tube. Don't know if it makes much of a difference in terms of noise - it should just sound a little louder.
If a 7236 tube is up to spec, it should have the same amplification no matter which brand.

Thanks, it took my Tung Sol 7236 a few weeks to "open up" so maybe the same is required for the Sylvania 7236? i suspect that both are gonna sound more the same than different, with the Sylvania having a wider soundstage,

 

[mordy]

I only have the Tung Sol 7236, but based on what I read, the TS is better sounding than the Sylvania. As always, the sound of a tube is amp dependent, and you have to let your ears be the judge.
Most tubes seem to need 30-50 hours to burn in, but some require much more time.

 

[JKDJedi]

I only have the Tung Sol 7236, but based on what I read, the TS is better sounding than the Sylvania. As always, the sound of a tube is amp dependent, and you have to let your ears be the judge.
Most tubes seem to need 30-50 hours to burn in, but some require much more time.

Yes the Tung Sol on initial listen has the tighter control in vocals and bass, and somewhat faster, the only tube that the Sylvania sounded better with was the Black Treasure...it wasn't even close. Thanks for your input, I had written a little write up for another thread then decided to can it until the Sylvania was burned in. Might not matter, the Tung Sol has its reputation for a reason.

 

[cddc]

Sorry to open this thread years now... but I have the same felling.
Paid big money for 5998 ting sol, but I’m really disappointed. To lean and bright with hd800

I find lots of people fond of 5998 use HD650 headphones.

 

[cddc]

That's a bit surprising, one thing I've never found the Tung Sol 5998 to be is lean and bright, In my system the TS is warm, but not overly so, transparent, with good detail and deep, warm bass. If they are NOS it maybe that they need a few hours burn in.

Just curious: were you using HD650 or HD800 or other headphones with the 5998?

 

[Scutey]

Just curious: were you using HD650 or HD800 or other headphones with the 5998?

I was using Beyerdynamic DT1990.