Direct heating triodes are really better?

[Tweeker]

Stuff for <110Mhz tends to be directly heated.

 

[rdf]

Outside of kilowatt-level AM modulators anyway 😉

The low mu ones are especially nice. According to the Eimac sheets on hand two of the early 3x3000a1 DHTs in push-pull will swing 6000 watts at 1.8% THD.

 

[Shoog]

Looks pretty squashed between -60 & -80 Vkg.

Most people seem to use the 6080's at high bias points where it may show poor linearity. I am running mine at -30Vkg for 100V on the plate and 100mA current. Works very well. This is a high current enabled tube and works very well at these high current low voltage settings. Infact in a push pull configuration it is the best amp I have made so far.

Shoog