JHCTES - Primary Capacitor

["John H. Couture" <couturejh-at-worldnet.att-dot-net> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

To All -

The JHCTES Ver 3.1 computer program available on the Internet shows a
default example for a 15KV/60ma NST. If the primary capacitor is changed the
secondary spark output will not change if the NST input current does not
change. This is correct if there are no other changes in the inputs for the
system. However, if the pri cap is changed to a resonant type (.0107 uf for
this NST) the NST input current will increase because of the new cap. This
new current value should be shown in the inputs. A new spark length will
then be shown in the outputs.

Normally the changing of the pri cap will only change the number of primary
turns necessary to keep the pri system in tune with the sec system. However,
if changing the pri cap changes some other characteristic of the system the
spark length may change. This could be a change in the breaks per second or
a change in the  overall efficiency. There is not enough empirical data
available at present regarding these effects to include them in any TC
program.

John Couture

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