[TCML] Still stuck at 36"

["Phil Tuck" <follies@xxxxxxxxxxxx>]

Hello.
If you do go for a sucker gap as Dr R suggests, the 'normal' distance for a
gap may not always apply. After some head scratching I found out that the
vacuum that is created, alters the normal spark distance. (I'm now using 10K
/ 100ma on a 192 thou or 4.9mm gap)

If I forget to start the suction (semi-industrial vac cleaner) my gap will
only start if the Variac is set around 220 volts (I'm UK based at 240volts)
, whereas with the suction on, it will start at about 130 volts and you can
go as low as 90 volts running. I found you need good suction, vac cleaner or
leaf vacuum cleaner (not a leaf blower) If you build it bigger than you need
you have capability for adding another NST as well. :-).

Phil

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