Quote:
Originally Posted by Dickie
You're a brave man for taking it on!
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no not brave poss daft
yes it is the set from you
Quote:
Originally Posted by ms660
Yes that's one way to measure the bias, the cathode voltage suggests it's 10 volts unless there's some leakage somewhere, when measuring cathode to grid voltage you should factor in what the meters input resistance will have on the cathode-g1 voltage.
Out of interest does the grid resistor connect to ground/chassis as shown in the schematic?
Lawrence.
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yes the the grid resistor goes to chassis ground
i have put the replacement ul41 in , i can put more HT in. before LT goes to high,, anode 180 volt, screen grid 170 g1 -9 but with mains reduced ul41 heater at 40 volt ht 190 volt, meter, Heathkit vtvm /fluke 25 any more volts and LT may pop small valves ?
thanks for the replies.. dave