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Re: 60" DisCharge Spark With Resitor.
Hi
The resistors started out at room temperature, about 85 degrees F. After a
2 minute continious run the resistors all warmed up to about 100 degrees F.
All the sparks were measured to a target except the 60" spark. The 60"
spark is an estimate. The 60" spark went out into the air as if it was
trying to strike a target but there was no target there. I had a target set
up at 27" and the 60" spark was about 160 degrees around on the other side
of the sphere away from the target.
Gary Weaver
At 08:02 PM 9/7/98 -0600, you wrote:
>Original Poster: "Malcolm Watts" <MALCOLM-at-directorate.wnp.ac.nz>
>
>Hi Gary,
> What was the degree of heating for each of the three
>resistors? Were all sparks measured while striking a target or were
>they air streamers?
>
>Thanks,
>Malcolm
>
>> Original Poster: gweaver <gweaver-at-earthlink-dot-net>
>>
>> I did an experement today with several different value resistors in the
>> circuit between the neon transformer and the spark gap. I used only one
>> resistor in the circuit. I tried 3 different resistors values. Each run
>> was 2 minutes long.
>>
>> Transformer = 15K/50ma unpotted neon in HV oil.
>> Gap Type = 8-at-.025
>> Total gap = .200
>> Primary cap = .0064 uf
>> cap type = rolled poly HV oil filled
>> Choke value = none
>> Max output = 22" to 60"
>> Primary coil = Flat wound .250 copper tubing .250 spacing 16 turns tap at
>> turn 12.
>> Secondary coil = 960 turns of #24 wire on 4" pvc pipe.
>> Topload = 6" copper sphere
>>
>> No resistor the output is 22" long with very white hot discharge sparks.
>>
>> 200 ohms 25 watts wire wound, output is 24" long, purple sparks.
>>
>> 300 ohms 50 watts wire wound, output is 27" long, light purple sparks.
>>
>> 430 ohms 20 watts wire wound, output is 27" long, very light purple
sparks.
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