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Re: Neon murder
Subject: Re: Neon murder
Date: Fri, 23 May 1997 20:04:20 Eastern Daylight Time
From: "Mad Coile{" <ts5815-at-devrycols.edu>
To: Tesla List <tesla-at-pupman-dot-com>
>Subject: Re: Neon murder
> Date: Wed, 21 May 1997 07:36:36 +0000
> From: "John H. Couture" <couturejh-at-worldnet.att-dot-net>
> To: Tesla List <tesla-at-pupman-dot-com>
>
>
>At 06:56 AM 5/20/97 +0000, you wrote:
>>Subject: Neon murder
>> Date: Mon, 19 May 1997 23:23:20 -0400 (EDT)
>> From: ADatesman-at-aol-dot-com
>> To: tesla-at-pupman-dot-com
>>
>>
>-------------------------------- Big snip
>
>
>
>>the fuse, or I need to think about this much harder.
>> As an aside, the burned side can still generate a really small spark
>>when
>>grounded to the case. Is it truly burned out, or is this maybe a case
>>of the
>carbon arcing I've read about (that can be fixed by baking in the
>>oven)? I
>>can dream!
>> Thanks for the help. Aaron Datesman
>>
>--------------------------------------------------------------
>
> Aaron -
>
> You need to think more about this problem. Most coilers do not
>understand
>why neon transformers fail. Most coilers also do not understand why RF
>chokes in the microhenry range will protect the transformer.
>
> The problem is that the spark in the operating gap produces transient
>voltages that can easily puncture the insulation in a neon. These
>transients
>are in the nanosecond range and are partially blocked by a choke of
>about 30
>microhenrys. Most coilers believe the chokes are for the peaks of the
>operating dampened wave voltage which would require millihenry chokes
>and
>are not a problem. These peaks are usually less than twice the rated RMS
>secondary voltage which the neon windings can handle.
>
>
John, how do you suggest building a 30uH choke? What works best, flat or
cylinderical spiral, and does it get hot? Wire size?
Thanks in advance for any help.
Tristan Stewart