different power tubes in a dual rec

[primeholy]

I received my Dual Rec a few weeks ago. I decided to pull out two of the power tubes and one of the rectifier tubes to run it at 50 watts. I noticed that the power tubes are different. While all are 6l6 two of them are 5881 6l6(str 425) and the other two are 6l6 gc(str 440). Does this make some kind of difference tone wise? I picked this up used so dont know how they come factory.

 

[stephen sawall]

KT77
6CA7
EL34
KT66
5881
6L6

All have different personality's in the Rectifiers.
Groove Tubes site and other tube vendors have a pretty good description of the different tubes.
Look around to find others....

Just swap out the two different sets to hear what they are doing ...