I would like to raise a point,
We are all aware of discharge resistors in power supplies and that its " bad practice" to not have a discharge path ie something like a resistor across the B+/HT charged capacitors. This is of concern linked to children in houses that may push hair clips through ventilation holes or where tubes could get broken when not in use.
So you don't want equipment holding high voltages for extended periods when little Joe or Diane decide to do an experiment just like daddy does and push something into equipment that could be conductive.
Its also an interesting build experiment to see how child safe and pet safe internal you can build. Things like iron circuits behind vent holes or where HT is not accessible from the outside i.e. you need to go at 90 degrees to access it. I did this as an experiment with my EF86/ EL84 build and tried to build enclosed with a tube rectifier.
Its also interesting to note that "Standard tube rectification" uses two B+ windings where the total voltage is across the two ends of the B+ secondary. As opposed to a tube rectifier with a diode return path hybrid rectifier using just one B+ winding half the voltage.
Remembering of course that as you solder on a project that the solder is conductive and you are holding it.
NB one other obvious point is equipment holding charge when someone tips a drink over it and then gets a cloth to wipe it up before anyone sees it.
You would think off is safe but of course we already now this but others don't.
Regards
M. Gregg
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