[BVARC] RFI

Gary Sitton gasitton at comcast.net
Mon Dec 20 08:58:20 CST 2021


I have enough ferrite beads in my shack to sink a boat! The problem you 
have is primarily radiated RF. The final nail in the coffin here was very 
heavy chokes on the main AC sources in the shack. Every wire more that 4' 
to 6' long makes a great antenna as close as your radiators are.
Gary , K5AMH


On December 19, 2021 8:57:56 PM Jimmy Vance via BVARC <bvarc at bvarc.org> wrote:
> One thing I've found with the snap on ferrite beads is to wrap the cable 
> through the ferrite at least three times.   End feds are notorious for RF 
> in the shack
>
> --jv
>
>
>
> On 12/19/2021 8:01 PM, Robert Polinski via BVARC wrote:
>> David, put several ferrite beads on the USB (Both ends) and the network 
>> cable & any other cables feeding the computer. (printer, etc) May also need 
>> a choke in the feedline. Robert KD5YVQ
>>
>> From: BVARC <bvarc-bounces at bvarc.org> On Behalf Of David F. Reed via BVARC
>> Sent: Sunday, December 19, 2021 6:24 PM
>> To: bvarc at bvarc.org
>> Cc: David F. Reed <w5sv.dave at gmail.com>
>> Subject: [BVARC] RFI
>>
>> Due to some HOA C&R, I am confined to attic and gutter antennas for the 
>> time being.
>> I am getting a bit of RFI on occasion into my PC; it manifests itself 
>> mainly by apparently disconnecting the com port from Commander.  When this 
>> happens, I can restore functionality by selecting a different com port, and 
>> then re-selecting the original correct com port.
>> I am grounded to a 10' ground rod about 8 ft. from the station via 2" 
>> copper strap. I did install ferrite beads on the USB cables at the back of 
>> the PC as well as on the power cord, and this has reduced the frequency of 
>> occurrence, but I would like to eliminate it altogether.
>> Any other ideas and suggestions would be most appreciated!
>> Thanks & 73 de Dave, W5SV
>>
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