From: Derek <tesla@xxxxxxxxxxxxxxxxxxxxxxxx>
Subject: Re: [TCML] Ignition coil etc
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
Date: Thursday, October 1, 2009, 6:15 PM
Brian,
I have an Ignition coil design, actually
a twin ignition coil powered from a 12V supply of about 3A.
Documented at http://www.extremeelectronics.co.uk/coils/it/
As a portable coil its great and (RF
burns excluded) pretty safe. Regarding the performance I'm
afraid its not really so good, but at only ~50W of input
power you can't expect much. Of course with a 24V supply and
bigger batteries or more ignition coils you could increase
the input power, but the coil soon becomes heavy and non
portable, so there is a trade off.
To get the 4-5' streamer lengths I do run
at 10-20 BPS again this is due to the low power, max volts
takes some time in charging. The small rotary is required
here to keep down the corona losses associated with a small
static gap.
For a true portable system with much
better sparks I have a pair of portable DRSSTC's both
battery powered, these are documented at Sprite ->
http://www.extremeelectronics.co.uk/coils/sprite/ and
Joan -> http://www.extremeelectronics.co.uk/coils/joan/
Joan is the most efficient and running from 10 x NIMH AA
cells and will give about 1' of arc to air in 1 second
bursts.
The only down side to the DRSSTC is its
complexity compared with the ignition coil solution.
Derek
Brian Hall wrote:
>
> I have run an ignition coil, and got some nice sparks,
by hooking it to 4 lantern batteries and a relay - thus its
completely portable, no need for 120/140v AC wall
outlet. I built it based on the plans available
here http://primeline-america.com/science/ -
shame that he advertizes it as a 'tesla coil' when we know
an ignition coil is oil filled, not truly an 'air-core'
transformer. But the plans are described nicely along
with the shopping list, diagrams are easy to follow.
>
>
> Someone has posted plans for an ignition coil driven
tesla coil
http://www.rmcybernetics.com/projects/DIY_Devices/homemade_tesla_coil.htm
has
anyone ever tried this? Any thoughts on its
efficiency/practicalness for TC
design? Unhooking from the wall socket is
the big plus I see here. If run out in a
field, all the usual grounding in place, then no worries
about it backfiring into your home wiring in the wall.
>
>
> heck, maybe even rig one up to the top of your car and
drive around on Halloween Night, portable lightning show!
>
>
> ---------------------------------- Brian Hall
>
>
>
>> Date: Thu, 1 Oct 2009 12:02:02 -0700
>> Subject: Re: [TCML] Ignition coil etc
>> From: henry@xxxxxxxxxxxxxxxx
>> To: tesla@xxxxxxxxxx
>>
>> I don't think that will work too well. You might
even damage the
>> ignition coil, and you won't realise its full HV
potential. Ignition
>> coils should be driven with something closer to a
square wave rather
>> than the sinusoidal output you'll get from your
transformer. The
>> sharp falling edge on the driver waveform is
needed to get the proper
>> inductive 'kick'.
>>
>> Try a dimmer switch circuit:
>> http://wiki.4hv.org/index.php/Ignition_Coil
>>
>> Henry
>>
>> On Thu, Oct 1, 2009 at 10:58 AM, Rhys Sage <rhys_sage@xxxxxxxxx>
wrote:
>>
>>> I've just got myself a nice new ignition coil
and a 16v AC 1000ma plugin transformer. Is there anything I
should put between the coil and the transformer to protect
either or both when I wire it up and plug it all into the
wall? Is there liable to be a backlash from the coil when I
unplug the transformer? Should I put a switch in between
transformer and coil?
>>>
>>> I have no idea how high voltage the coil is.
It's a new coil for a Mustang. Quite nice and small - made
in China and no other markings on it. The box says MasterPro
E70 and the UPC is 84126602575.
>>>
>>> I figure it's a lower voltage coil so a higher
voltage input should be fine.
>>>
>>>
>>>
>>>
>>>
_______________________________________________
>>> Tesla mailing list
>>> Tesla@xxxxxxxxxx
>>> http://www.pupman.com/mailman/listinfo/tesla
>>>
>>>
>>
>> -- Henry Hallam
>>
>> Sent from my Laptop
>> _______________________________________________
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>> http://www.pupman.com/mailman/listinfo/tesla
>>
>
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