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  1. J

    For fun - What is your degree?

    98.6
  2. J

    nano ampere

    Pico ammeters are available, but they don't give them away.  Stray currents are always a problem when measuring currents this low; you might even need a shielded chamber.  Good luck.
  3. J

    TENS voltage stabilisation.

    I've never heard of a TENS unit going up to 200 volts; the one I own is considerably below that.  Are you certain this isn't a failure of the unit itself? Also, does this operate on RF?  Never heard of heterodyning in a TENS unit; only on AM.
  4. J

    Component symbol... CRT's PCB

    I think that is a symbol for a MOV, metal oxide varistor.  It is a safety device designed to clamp the voltage to a specific value.  In your case, probably to prevent higher than normal voltage getting to the CRT elements--possibly the screen circuit (the screen is one of the grids of the...
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