Thatâ??s possible! I did notice arcing before the fire, suggesting leads
might have been too close together.
Iâ??ll try again and see how my results hold up.
On Fri, Nov 26, 2021 at 4:10 PM Gary Lau <glau1024@xxxxxxxxx> wrote:
> Hi Joshua,
>
> I would not get hung up trying to optimize attenuation of your coil's
> resonant frequency. Again, the point of the R-C finter in the Terry filter
> is to filter out VHF bursts that occur during the gap's zero-crossings.
>
> As to why your filter cap died a fiery death, that is a mystery. Perhaps a
> construction defect where you had just two in series rather than three?
>
> On Wed, Nov 24, 2021 at 9:51 PM Chris Reeland <chrisreeland@xxxxxxxxx>
> wrote:
>
> > Hi Joshua,
> >
> > "On Wed, Nov 24, 2021, 7:58 PM Joshua Thomas <joshuafthomas@xxxxxxxxx>
> > wrote:
> >
> > Gary, I had been reading your notes on filtering and resistor inductance
> > here: http://www.laushaus.com/rcl_filter_simulation.htm
> >
> > I had to check with the manufacturer, but the self-inductance of my 500
> ohm
> > wire-wound capacitors is 220 uH. My resistor's actual measurement is 470
> > ohm. An RCL simulator with 470 ohm, 220 uH and 1 nF (the setup I was
> using)
> > shows a small signal gain in the frequency range my coil resonates. It's
> > not much - less than 2 dB - but it's enough to make me wonder if this
> > contributed to the damage to my capacitors.
> >
> > I will be choosing a capacitance value for the rebuild of the filter
> which
> > doesn't have any gain in my coil resonant range. As well as significantly
> > more capacitors to limit the stress per capacitor.
> >
> > -Joshua Thomas"
> >
> >
> >
> > I want to say to not forget at the time of burning them up you were
> > accidentally floating your center tap NST. Could very well be a factor
> > also...
> >
> > Chris Reeland
> > Ladd Illinois USA
> >
> > Sent from my Lenovo Tablet
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--
Joshua Thomas
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