Two power TX's are a bit of a PitA. The Guinevere Iron, when built into a PP 6V6 amp would run the power stage B+ on the 325 taps. The drivers could be done on the 400v taps.

It would be dificult( close to impossible I think ) to do an E-Linear driver at different DC w/o a tertiary winding. A resistive hook-up from plate to grid *IS* possible. The two B+ supplies do require a bit more realestate and expense.

For something low mu like a pair of 45's the additional headroom would be a useful feature. A 10k a-a OPT would do PP 45 quite nicely and with reasonable PS headroom. 45's are a bit small in the power department. 3W is what I would expect. I'd suspect that we could get away with a bit more than 100 mA with an L-C PS, and taking the load for the rectifiers off the core. 2A3's would be cool and a reasonable maximum. 6 or 7 watts with a 6k a-a OPT. They'd be a good 6 or 7W...
regards,
Douglas

L-C filters are the easiest on the power TX. 130 mA delivered to 300V is ~40 Watts. It would be Bottlehead-close but I think it can be done. If you went and used the 325 v HV taps and accepted ~230 volts for a fixed bias pair of 2A3's I would be even more confident.

Keep in mind that the 2A3's will not be loading the PT with their filaments. The lower voltage OP point will also slightly cut into the driver output requirement. That's a good thing too.
regards,
Douglas

Ra=(4,2*59)/0,05 - 800 = 4156 Ohms, lets say "standard" 4k, then:
Ua=(mu*Ugk)/(1+rp/Ra) = 146Vrms, and:
Pa=Ua^2/Ra=5,3W

Available current swing give us the power: Pa=Ia^2*Ra=5W

And Raa = 2Ra=8k, Paa=10W - losses are about 10-15%, and we can expect max. power Pout~8,5W.

If we use higher, more "relaxed" load Raa=10k (lower distortion, higher DF, but lower power), we can expect about Pa=9,1W, and Pout~7,7W. Not bad (theoretically)?

The core is good for ~70 VA. With 10VA for the rctifier, and 5 VA for the front end, there ought to be plenty left for the plates through the 325 plate taps. I ran a sim with PSUDii with 325vac into an LC filter and got 260V. 50VA at 260V leaves something like 190 mA. We'd only have to worry about copper losses, and these things are rated for operation to 100C/212F ( FWIW, ~140F is enough to cause you apin fairly quickly ). It oughtn't to get that hot.

I took another of their PTX's and ran it over its rating into a cap input filter and it got fairly hot, but not to burn quickly. These guys are conservative enough IMO to run PP 2A3's without smoking.

regards,
Douglas

33% increase for using the L-C filter.

If we assume it can deliver its rated 100 mA into a cap input filter, it will have no troubles with a choke input.

You gave me a general size of the Iron. It'll be fine. Perhaps run harder than I would do with a clean sheet design, but adequate.
regards,
Douglas