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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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