Quote:
Originally Posted by bandersen
You need less negative voltage on G1. Notice the Sencore CR70 (which support the 7JP4) has a position for scope CRTs that adds +10 volts to the grid bias. +10 meaning 10 volts less negative.
That will cause the electron gun to conduct more and you'll get a stronger reading.
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So would that mean a resistor on g1 ? Or add voltage somewhere? So a 12lp4 the tester uses cathode g1 and g2 which one would I open and add voltage to ? Ok it looks like it’s g2.