Teletone verticle size

[timmy]

the 6x5 rectifier is a full wave rectifier so im wondering if this tube goes bad can it be replaced with a resistor for the heater if its in a series string set and placing 2 diodes in place. this tube is from a teletone tv 208 and it also has a 25z6 positive i think half wave and i know 1 diode can be used in that place with IIRC a 50 ohm resistor for the heater. please correct me if im wrong.