Quote:
Originally Posted by ms660
You've done your voltage table wrong.....swop the AM & FM (Column 4)
|
Well spotted Lawrence - I simply transposed my AM and FM - corrected table here: -
Quote:
If the 12AT7 heaters aren't working it can only be one of two things, either there's no heater voltage supply to the valve or the valves heaters are open circuit (in effect)
|
A step to a hint please on how to check these out?