[Mondial]

I would not recommend it. First, the diodes have a very low forward drop, so unless you add series resistors you will end up with high B+ voltage. The tube 80 also acts as sort of a fuse, in that under momentary overload it will limit the transformer current to a safer value than a silicon diode. With a short on the B+ line the plates of the 80 may glow red, but if shut off quickly, likely no damage will result.

How bad is your 80? Sometimes a weak 80 still has enough emission to provide rated B+ voltage to the radio, especially with today's higher line voltage