size counts
Single ended class A amplifiers are usually very ineffecient.
However, the output valves, look like KT88 which being pentodes, are probably being used in a class AB - which reduces the transformer size and eliminates odd harmonics.
!
The size is due to the physical size requirments of the output transformersm

The mains transformer will be hefty to - the 6.3V filament heater will be quite a meaty secondar coil (needs to supply some 6 to 8 amps constant)

Couple of questions
1 are the heaters dc regulated or ac? Always makes a difference - especially to audio knobs
2 self biased or dc biased? Again dc bias regulated?
3 ultralinear or not assuming I was right about KT88
4 why aren't the mono block?

As for aesthestic appeal - it doesn't do it for me, but I wouldn't blow 8k on a valve amp; I blow more than that on forming a company to make the fucking things and fail dismally.
(CheatingRabbit, Sat 31 Jul 2010, 15:52, 1 reply, 16 years ago)

Can I have your babies?

( Bartleby A dead man on vacation, Sun 1 Aug 2010, 10:33, Reply)

of course
Come and collect them - but I warn you that 3 teenagers aren't cheap and they argue like hell too














Or did I misunderstand?
(CheatingRabbit, Sun 1 Aug 2010, 15:03, Reply)

It's just that I am overawed with your understanding of valves and stuff
When I did my aprenticeship, we learned about them as well as transistors, and even integrated circuits.
( Bartleby A dead man on vacation, Mon 2 Aug 2010, 7:51, Reply)