Line stage using 6V6, 6W6, 6G6, 6F6 etc. in triode?

[andyjevans]

There are many happy builders of 6V6 line stages thanks to the long thread on this. But what of all the other similar pentodes/tetrodes that can be used in triode?

What have been your experiences with these, and which were you most pleased with?

6V6 - 6.3V/
6W6 - 6.3V/1.2A
6Y6 - 6.3V/1.25A
6F6 - 6.3V/700mA
6G6 - 6.3V/150mA
6K6 - 6.3V/400mA

Other......

 

[45]

I prefer those with cylindrical geometry. The 6F6 is one my favourite pentodes.

The original 6F6/2A5/42 is like that but now and then a few with oval plate can be found. Same construction for 6G6 (i.e. mostly cylindrical and some with oval), but I have only listened to your amp which liked a lot.

The 6V6 I have only seen it with oval plate and 6Y6 and 6W6 with box plate.

The 6K6 I have seen with all shapes! Cylindrical, oval and box plate.

As a preamp and driver the 6G6 is the most efficient/convenient with its 150mA heater current, IMHO. In most cases 10-12 mA anode current are enough.....

 

[andyjevans]

Thanks 45. I need to try the 6F6 in one of its versions. And the 6K6.

I can recommend the 6G6G - at least as good as the 6V6 when I tried them.

 

[stevenrotterdam]

I have a lot of 12A6 , triode curves look OK and they cost next to nothing.