[jambaj0e]

So my Sylvania "Bad Boy" has the triangle Sylvania logo and "0 3 9" typed vertically to its right, as well.

 

[bcowen]

.

 

[attmci]

If you're referring to the two little silver dots inside the top, that's just extra getter material that migrated up through the plates when it was flashed. Nothing to worry about at all.

@2359glenn
Glenn said that's the sign of well used tube.

I have many tubes have the mark.

 

[bcowen]

.

 

[attmci]

Who's Glenn, and I assume you're joking?

The designer of the GOTL. I am not joking.

 

[bcowen]

.

 

[ProfFalkin]

Looks like getter flash to me.

 

[Ripper2860]

WHO ARE YOU AND WHAT HAVE YOU DONE WITH THE PROFESSOR!?

 

[attmci]

Silver spots do not indicate usage in and of themselves. Brown spots do.

I am not Glenn. Ask him
@2359glenn
.

 

[Ripper2860]

Well Hell. I guess I'll have to toss my Sylvania Chrome Domes.

 

[bcowen]

.

 

[ProfFalkin]

Howdy!

 

[jambaj0e]

Ooh, I may actually like this Sylvania 6SN7GT Bad Boy better than my Kenrad 6SN7GT Black Glass. I can get impactful bass with EQ on both for my Audeze LCD-2C, but the mids seems a bit clearer with the Sylvanias!

 

[MattTCG]

If any of the regulars here have any Ken Rad or Sylvania that you are tired of and would like to part with, PM me.

 

[441879]

@jambaj0e you may want to PM @Jason Stoddard and see what he says. The 6sn7 equivalent tube challenge has nothing to do with my company, it is just something I came up with to see how much difference folks could detect in such tubes, as well as to find out which ones people preferred. It is pretty easy to go by public opinion or spend $250 for a tube and have a preconceived notion it will be wonderful.

I will be shipping the concealed tubes to Jason along with tube extenders and possibly switch boxes with cables so people can A/B test the tubes. Jason does a monthly get together and the next one will take place September 12 as I recall and feature these tubes. I have sealed them in such a way that it is not likely anyone can tell one from another. Within the PVC are classic examples of great tubes by RCA, Tung Sol, CBS/Hytron, Sylvania, Melz, Foton, Westinghouse, etc. I need to look around the shop but I believe I can send switch boxes that would allow switching between four tubes at once if Jason can dedicate four Lry 3's to the test process. This will be much easier than what @bcowen went through. He had to listen to one at a time and just go from memory and he did remarkably well.

Very much looking forward to seeing how this turns out. Hopefully this can be done in a quiet space for real listening.