Re: [TCML] on rotary gaps and tone wheels

[Phillip Slawinski <pslawinski@xxxxxxxxx>]

> In days of yore (say, 10 years ago).. the peak power in a SG TC (say,
> discharging several tens of joules at 30kV) was higher than you'd get in a
> SSTC (because the pass devices can't take the peak current).
>
>
> Consider a primary with a 0.035 uF cap charged to 30kV discharging into a 80
> uH primary (fres around 95-100 kHz).. The peak current is about 630 A.  back
> when, this would be a challenge to handle with FETs (or a vacuum tube).  I
> suppose today, one can get IGBTs that can handle that sort of peak current.

The power gap between SGTC and SSTC has been gone since the invention
of the DRSSTC.  For a while there was quite a price gap between DRSSTC
and SGTC, but lately that seems to be narrowing.

As to the peak currents, in general the peak currents you find in a
SGTC of a given size are considerably lower than those you find in a
DRSSTC of a similar size.  There are many DRSSTCs that running tank
currents well in excess of 1kA these days.

-Phillip Slawinski
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