Topic: tube blackening - is it normal?

[ob1]

Hi,

    Newbie on tubes here. Just recently, I removed the "tube cage" of my dared mp5 and noticed that the big tube had a blackening at the top. Parang nasunog. Is this normal? Or should I return it to the store (still under warranty). BTW, Sound seems OK and the bars on the big tube are moving when volume is set at 11-12 o'clock.

    Thanks!

[Superman]

Yes it's normal

[ob1]

Thanks for the quick reply Sir 

[AudioAmplified]

As far as we understand this amp (since we sell it too) the big tube does not really affect sound.  Its just like a meter showing off the volume levels. Please correct me if i am wrong

No worries on that... almost all tubes changes color when used.

[JojoD818]

I believe that you can even run the amp with that tube out of it's socket... 

[AudioAmplified]

I believe that you can even run the amp with that tube out of it's socket... 

Yeah   scary to try hehehe.   

[JojoD818]

Yeah   scary to try hehehe.   

no worries, done that already sir... 

the only connection to that tube from the signal path is via pin 1 but only after a coupling cap, a half-wave rectifier and an rc network that dictates the "attack/decay" of the level display... 

I got a bit higher supply voltage to the input tubes though when the larger tube is out of it's socket... the effect was negligible to my ears though. 

[Ctlim]

is that the 6E2 magic eye?

[JojoD818]

yes it is.