[Amps] Transformer guess?

[Vic K2VCO]

I have a small power transformer here, Philco 45-7011-7, which I would like to use for a 
screen supply. It has the usual center tapped HV winding, which measures 380-0-380v, just 
right, as well as 5v and 6v filament windings.

What I want to know is how much DC I can draw from the HV winding with a full-wave CT 
circuit. Googling the number reveals a similar, but smaller transformer rated at 
350-0-350v at 40 mA, the 45-7011-1. This one is bigger so I am hoping it will be capable 
of more current.

The transformer weighs 3 pounds 10 ounces (1.63 kg). The lamination stack measures 3-3/8" 
x 2-7/8" x 1-1/2" (8.57cm x 7.3cm x 3.8cm).

Can one of the transformer gurus hazard a guess as to the current capability? I'm hoping 
for 75 mA.

-- 
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco/