14rp4 substitute

[dieseljeep]

Originally Posted by timmy

Just out of curiosity wouldn't it be safer to just use a separate transformer for the heater and place a resistor in place of the crt to complete the string ?

A while back, someone wanted to sub a 14R for a 14AT. There, the transformer was the only way to handle that problem, plus a 6.3 volt transformer is a common part.
In that set, there was enough room to mount the transformer.