Acrosound TO-330 output transformers

[Bakunin]

Hi fellows!

This is my first post in this forum.

I have a pair of those wonderful vintage output transformer and want to assemble a pair os amplifiers.

I'm insegure in what circuit I can use.

Any help, please?

Many thanks in advance.

[Tubes4e4]

Hi,

I have a pair of those wonderful vintage output transformer and want to assemble a pair os amplifiers.

Lucky guy!

I'm insegure in what circuit I can use.
Any help, please?

Why not use circuits Acrosound recommends themselves?

There is an Acrosound brochure available somewhere on the ´Net, called Acro55.pdf, full of suggested circuits for several Acrosound OPTs.

Here is the link

In this brochure, for the TO-330, a "big brother of Williamson" circuit is given, using 4 pcs of KT66 in parallel push pull ultralinear.

Also, another circuit is given for the T0-330 using 6550/KT88 push pull / UL.

This brochure is very interesting not only for the OPTs, but for the circuits also. Acrosound seems to have had a preference for the Van Scoyoc phase splitter

Tom