I use a 6AS7G (=6080) as a cathode follower to driven my HD540 (300 ohms) .
Sounds pretty good .....

Ronald .


"Sander deWaal" schreef in bericht
...
"Fabio Berutti" said:

Generally speaking an OTL is a solution to a problem (need for an OPT)
which
creates a worst one (a terribly complicated circuit). Stick to good iron,
it
is VERY easy to wind a 5k/300R tranny.
By the way You can make Your headphone amp with one single valve, a 6S45
CCCP triode or a more costy US WE417or even a burst-your-budget TFK 8020.

OTOH, an OTL headphone amp can be made real easy with say a ECC88 in a
SEPP configuration.
I've seen 6AS7 schematics as well. Probably as simple as a transformer
coupled amp.

--
Sander de Waal
" SOA of a KT88? Sufficient. "