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Re: remote location of NSTs - away from coil base?



Original poster: "resonance" <resonance@xxxxxxxxxxxx>



The SuperCon is a convenient connect to use because it gives very solid connection. Nothing to do with the current rating of the connector.

Blumlien effects can be used to generate high potentials in coaxial cables --- See "Power Electronics" by Sargent & Doler.

I can only say that a very high resonant rise occured on our coaxial cable power coil --- and we never used coax again! The resonant rise was awesome but would be sure damage to a pole xmfr if it continued. It would have been instant destruction to a nst power xmfr.

Somethine in the circuit caused the wave to reflect and become very destructive when the standing waves formed. Similar to racing sparks on a secondary coil. Destructive.

Dr. Resonance


----- Original Message ----- >
Original poster: "resonance" <resonance@xxxxxxxxxxxx>

Avoid using coax for any HV leads with either pole xmfrs or nsts.
It can produce incredible capacitive resonance effects where you
don't want them --- in your power supply.  Coax is great for DC but
not the best idea for AC.

We used coax once with a pole xmfr and the resonance effect
(Blumlien effect) was so powerful the spark was jumping 16 inches
across at 14.4 kV bushing on the pole xmfr to get to ground.

I thought the Blumlein (transmission line voltage reversal) effect
has to do with the spark gap firing.  How would it matter whether the
lines are carrying AC or DC then?

Use silicone GTO neon sign xmfr wiring (local neon shop) with 2
leads to send your power over to the base of your oscillator.

Much more expensive, and how do I keep secondary strikes out of that
wire?  That's why I wanted to use coax.

It's also nice to use a pair of 25 Amp Supercons (DigiKey
Electronics) plugs and matching receptacles to terminal the leads

Are those the high current Superior Electric connectors?  I don't see
them listed at DigiKey, not finding them with searches there - got a
part #? Not that I'm likely to use them, I remember them being very
expensive.

--- this allows you to rapidly plug/unplug your power leads into
the oscillator base.

I had planned to make my own HV connectors, but that design wouldn't
work with silicone or other soft-insulation wire - works best with
solid-poly coax core.

Why bother with a 25 amp connector for the HV leads?