EL84 Quad switch

[dscottguitars]

Hi, I am considering building an EL84 PP amp with switchable two tubes to four tubes (parallel). I don't have a schematic to share, but I think the power section is somewhat standard. I plan on using a cathode bias.


What would be the best to use in the switch? the plate wire, input, or cathode? 


Thanks,


Daniel

[sluckey]

I've seen a lot of 36W EL84 amps that switch cathode resistors. Like this...

http://www.ceriatone.com/ceriatone/wp-content/uploads/2016/08/36WNewCeriatone.jpg

[dscottguitars]

That looks good and simple too. Thanks...