Hot tubes/

Hi, Question; is an 6BR7 tube supposed to get hot? I detect a very small glow, but the tube stays just warm?

Yes, what T do you measure of the envelope ? See typicals in the following datasheet :



Regards, Dana.

Sorry, 'T; ?

paddy ryan said:

Sorry, 'T; ?

Click to expand...

I would assume temperature?.

However, what voltage are you feeding to the heater?, it's a standard 6.3V heater.

It's only a small signal valve, they don't get terribly hot, if you can see the heater glowing it's probably hot enough.

Going back decades to when I repaired valve gear on a daily basis, you could easily change running small signal valves with your bare hands, where as power valves often needed a duster round your fingers.

Thanks folks, thats great.