[TowerTalk] metal-on-metal interference

[Roger (K8RI)]

On 7/23/2010 7:02 PM, K1TTT wrote:
> No, metal on metal rubbing by itself doesn't cause interference.  But if
> there is a voltage difference between the parts that are rubbing THAT can
> cause interference.
>    
There I disagree.  When the local repeater was here, I could walk up to 
the guy lines and rub a 10" screwdriver blade against any of them and 
drown out a 50 watt mobile 2 miles away. BUT if they are two metal parts 
in the near field they are most likely going to have different voltages 
on them.

73

Roger (K8RI)
>
> David Robbins K1TTT
> e-mail: mailto:k1ttt at arrl.net
> web: http://www.k1ttt.net
> AR-Cluster node: 145.69MHz or telnet://dxc.k1ttt.net
>
>
>    
>> -----Original Message-----
>> From: Michael Fox - N6MEF [mailto:n6mef at mefox.org]
>> Sent: Friday, July 23, 2010 22:03
>> To: towertalk at contesting.com
>> Subject: [TowerTalk] metal-on-metal interference
>>
>> I've heard that metal-on-metal rubbing contact causes RFI.  But doing some
>> Google searches, I can't find a source of information.
>>
>>
>>
>> Can someone tell me:
>>
>> 1)  Is this true?
>>
>> 2)  If so, is there a source for information?
>>
>> 3)  Specifically, is there a general frequency range for the interference?
>>
>>
>>
>> Thanks much,
>>
>> Michael
>>
>> N6MEF
>>
>>
>>
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