Which one is the better design?

[FrancoB]

Need some help deciding which amp would be the best choice.

http://www.worldaudiodesign.co.uk/pdf/kel80crt.pdf

http://www.plitron.com/pages/Products/Audio/circuit.htm

I would appreciate some help from the tube gurus.

TIA

Franco

 

[Sch3mat1c]

Need some help deciding which amp would be the best choice.

http://www.worldaudiodesign.co.uk/pdf/kel80crt.pdf

I don't like the unbalanced STP (short-tailed) but suit yourself.

http://www.plitron.com/pages/Products/Audio/circuit.htm

Yikes, a cathodyne splitter running two pair! The only time I'd ever trust such an arrangement would be with +600V supply and a chunky triode, say 12B4, for the splitter. And then the drive requirements...

A pair of 6V6, sure, but no quads, not without a buffer (a.k.a. Williamson driver circuit). Although if voltage requirements are low I'd let a CF driver pass for the buffer (also escaping the unstable tendancies of the Williamson circuit).

Tim

 

[sreten]

I'm certainly not a tube guy technically.

But I do know the second design uses "ultralinear"
taps on the output transformer, and the first is a
"monoblock" design, very difficult to compare.

Personally my much less than guru opinion
would be go for the complete WAD package.

🙂 sreten.