sorry about the confusion guys.
the "operational" transformer was not producing anything when connected to the PS board.
the second transformer is not hooked up to the PS board - just the primaries to the IEC inlet. but wait...
i disconnected the second transformer, powered up with only one transformer/PS board - no blown fuse, working fine, and getting 250V on the PS output. i did not have the amp boards connected when blowing fuses, and have not connected them yet. i'm just testing the PS mods. at least my P2P is holding up.
disconnecting the second transformer from the IEC is the only change i performed and all is working well.
when the fuses fried, this was immediately on power up.
do i need a higher rated fuse?
can anyone explain why i was blowing fuses before?
both of the transformers are 370 DAZ (DAX). i've triple checked the wiring on the transfos.
i will get the second PS board mod done this evening, and hope to have both of the PS sorted.
thanks everyone!
@ Amphead: awesome!