I've never built a copy of anything; but after scoring five Chicago Transformer BOH-2 (20K push-pull plates to 600/150, +30dBM), I'm considering a Langevin 5116-B. This is an all push-pull circuit using one 12AX7 and one 12BH7.

Anybody ever hear of Malmac X10 AJ line transformers? They're 600 ohms:600 ohms and came out of an old Ampex duplicating chain recorder electronics, I think. Are they any good?

Thanks,

Seth

PS. This is all CJ's fault. I would have chucked them before.

:) Hi Sebatron ! I edited the boring history of why I am asking this question, sorry.

Is it desirable to have an input transformer that provides a maximum output, or is there a balance judgment between response, gain, and other things?

--Rick

Isolation transformers, has anyone tried using these things? Did it help? What type? THANX

I recently hooked up with a nice fella in this forum and bought a 4 ch. John Hardy M-1 from him. I've since learned that these pres can have an output transformer added as an option. First of all, any thoughts in general about what I should expect once I've gotten them. Second, what's the difference in sound with the output transformers?