Re: HBridge DC coil

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Scott Hanson by way of Terry Fritz <twftesla-at-qwest-dot-net>" <huil888-at-surfside-dot-net>

Larry -

(I'm unable to contact you at your MSN e-mail address, so I'm using the
Tesla list)

I'd also like to be get a copy of a scanned schematic (.jpg or .pdf) of the
latest mods to your H-bridge setup.

Or better yet, send it to Terry (list moderator) and have him archive it in
his "temp" directory at hot-streamer-dot-com.

It sounds like an interesting setup, and it seems that you are getting
reasonable performance despite the higher gap losses that might be expected.

Regards,
Scott Hanson
----- Original Message -----
From: Tesla list <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Tuesday, March 05, 2002 6:57 AM
Subject: HBridge DC coil


> Original poster: "LWRobertson by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<LWRobertson-at-email.msn-dot-com>
>
> Hi Steve
>
> Before you tear that H-Bridge apart, I've come
> up with a mod that almost eliminates all the
> problems, and lowers ESR by taking the storage
> cap out of the RF path. Maybe you could see how it
> works for you - my coil really came alive, I'm seeing
> 20 inch single-shot sparks at 1 BPS at only 7500
> volts in, and it starts firing at 3500V, very strongly.
>
> Also I can ground one end of the primary, eliminating
> any possibility of flashovers; it is much easier on pulse
> caps; doesn't need a low ESR storage cap; and it uses
> a charging choke to almost quadruple the voltage to the
> coil. It retains the no power arc and no ballasting benefits,
> and doesn't need more equipment than what you have now.
>
> The downside as usual is  complication, now you
> need a DC supply, charging choke and diode, and a
> rotary. Sure works well, though.
>
> If you have MicroSim, I'll be glad to send a schematic,
> or I can draw it out and scan it for you.
>
>
> Cheers
> Larry Robertson
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