[sdiy] guessing HV power transformer's current capacity by its dimensions?

[anthony]

I was wondering if you can somewhat accurately judge the current handling 
capability of a high-voltage power transformer by its size. I have a rather 
hefty transformer that was in a pice of test equipment that had a lot of 
tubes in it. The secondary doesn't have a center-tap and the rectifiers were 
solid state so I can't guess based on what the rectifier can handle (and the 
original solid state diodes are long lost). It has 2 filament windings, both 
without center-taps, one green which is visibly much stouter than the other, 
yellow one. Most of the tubes were 12AX7's , but there were 6BK7B's, 
12AT7's, 12AU7's, some acorns, a Nuvistor, various small pentodes, and 4 
EL84's working as current amps in the voltage regulated power supply.

The fact that it is using 4 EL84's in the power supply might signify that 
the xfrmr indeed handles a lot of current, but using an 0A2 and a 5651, 
would require current amplification if there was even modest demands on 
their current handling capability (which isn't great).

I guess it seems like folly to try to guess at it this way. I mean most of 
the space for the windings may be for the filament windings and the primary 
winding to go with them. But I think it would be an even greater folly if I 
was trying to judge something like a power transformer from a 'scope (which 
do work very well for other uses if you tuck the unneeded leads safely 
away...).

Why I'm even fussed about it is I'm trying to determine if this would be 
enough or too much transformer for powering 2 GA-5T Crestline circuits 
(2x2x6AQ5A push-pull) biased to run nearly 100% Class A on the same chassis.

It's about the size of a large-ish grapefruit or more like a smallish musk 
melon and weighs I'd say close to 10 lbs.

And I'm actually not so much worried about it not hadling enough current, 
but being wasted on a project that could make do with a smaller transformer 
and using it for an amp that puts out much more power, like something with 2 
6L6GT's or 2 EL34's...

AA