Arfa Daily wrote:


What's the spec of this tranny, Arfur?


Single primary at 0 - 240v


** As seen from the outside, internally there are almost certainly twin 120V primaries, wired in series as was the case with the XLS602 tranny.


One multi-tap secondary 120v - 80v - 40v - 0 - 40v - 80v - 120v


** So it's a class H, multi-rail amp.


It doesn't say on it what the VA rating is, but it's a lot. This thing is 14
cm diameter by 12 cm tall and almost too heavy to pick up with one hand ...


** The tranny in the XLS602 was 16cm dia x 8cm high.

Nearly the same in volume and weight.

FYI

The VA rating and regulation percentage of commercial mains transformers closely follows their primary resistance, not by any simple formula but ones with the same resistance have similar VA ratings.

Egs, for 240V rated transformers:

50VA = 60 ohms & 13%
160VA = 12 ohm & 8%
300VA = 4.7 ohms & 4%
800VA = 1.4 ohms & 4%
1000VA = 1.1 ohms & 4%



.... Phil