[Mondial]

There are some locations in the circuit where replacement of the paper caps is very critical. The most important is the coupling cap between the first audio amp plate and the audio output tube grid. Any leakage here will cause the output tube to draw excessive plate current, loading the supply and overstressing the tube and output and power transformer. As the radio warms up, the leakage will increase and eventually cause a runaway condition. This can cause overheating and damage after the radio has been on for a while.


Any of the paper caps subjected to high B+ voltage and where their failure would cause additional damage should be routinely replaced.