To what attenuation level? The attenuation is logarithmic with spacing,
and I can't believe that a quarter wavelength would provide more than
about 3db or 6db attenuation.
Dave AB7E
Norman Hockler wrote:
> Tower Talkers
>
> It's called "frequency at cut off " An opening that's smaller than
> 1/4 wave length will block all signals lower in frequency.
>
> de Norm N8NH
>
> At 04:36 PM 5/31/2008, David Gilbert wrote:
>
>
>> Hi, Warren.
>>
>> I was going to suggest that 1/10 wavelength grid spacing at the highest
>> frequency you want to shield would be sufficient, but I found this
>> reference that recommends 1/20 wavelength.
>>
>> http://www.hollandshielding.com/pdf/emiemc_encyclopedia.pdf
>>
>> By the way, I didn't make it to the post office in time yesterday, so
>> the disk I promised you won't go out until Monday. Sorry ...
>>
>> 73,
>> Dave AB7E
>>
>>
>>
>> warrenwolff@aol.com wrote:
>>
>>> This cage idea has always intrigued me.
>>>
>>> The copper mesh may be the cheapest and easiest way
>>> to accomplish such an arrangement, BUT, it there a
>>> maximum mesh size?
>>>
>>> It seems that one might find it just as effective to run
>>> a? "nest" of copper wires, say 3 feet (or other) apart
>>> and accomplish the same thing.
>>>
>>>
>>> Warren; W7WY
>>> _______________________________________________
>>>
>>>
>>>
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>>>
>>>
>>>
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>>
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>
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