i just recapped my bf bandmaster who might be a contemporary of yours - bought used in '71. bandmaster rectifier diode type?.
kit cost $69.99 from vintage amp south (ebay store), although u might be able to find cheaper at local electronic store.
schem (ab763) shows pilot light powered off heater winding of pwr trans. do the tubes light up (assume no short now)? if not, pt is in trouble i think. I was looking at them fearing the worst for mine - $180 seemed ballpark.
so, some bucks worst case...