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Re: [TCML] DC Coils



Hi Carlos,

Sounds like your DC rail is collapsing under load. Have you tried increasing the values of your doubler and DC storage caps?

Bert

lightningfor@xxxxxxxxxxxxxxxxxxxxxx wrote:
Scott,
I have tried increasing the break rate, and it does increase power input
and to some degree spark length.
My inductor is calculated to give a max bps of 500bps, and spark gap works
smootly up to that break rate. (below extinction frequency)
My inductor is also multi tapped, so I have tried smaller inductances to
allow more current, but this did not help.
The only thing I can think of to explain the results is that the 10kv
supply is not being doubled...
But based on the spark gap I am using, I do not believe that is the case.
Also, back in the early days of coiling when I used to use 10kv AC, the
coil would still be drawing more power and producing big arcs with a cap of
this size and similar break rate...

carlos



On Tue, 10 Jan 2012 15:23:20 -0500, Scott Bogard<sdbogard@xxxxxxxxx>
wrote:
Hi Carlos,
      Having never built a DC coil you should probably ignore me, but if
I
had to guess I would say your doubler is limiting your current.  If you
can
vary your spark gap speed you can determine if this is the issue, if a
faster break rate improves performance, current is not an issue, it was
a
calculation error, if it worsens performance, I would guess your current
is
being chocked by the doubler.  Again, probably best to ignore me, I've
never built a DC coil, but you are correct for similar power levels
results
should be the same...

Scott Bogard.

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