OK, ok... maybe I shud ask if anyone's got a SINGLE 572B out there

I have 1 Cetron that tests 25 on the scale of 36. 36 is 'minimum'
on a TV-7U checker set for 811s

PeeEss 811 for 572B nay-sayers. They're same tube except for plate dissipation
& max. voltages

Tnx,

Marty AA4RM