[RFI] RFI on New Digital TV

Jim Brown jim at audiosystemsgroup.com
Thu May 22 17:12:04 EDT 2025


Thanks for the feedback, Jim.  I'm not surprised that both ends were 
needed. Suggests either a common mode problem on both ends or that it 
simply needed another 6dB of choking.

73, Jim K9YC

On 5/22/2025 2:00 PM, Jim McCook wrote:
> For now the RFI on the new digital LG TV has been stopped.  The solution 
> was a type 31 one inch ID snap-on toroid with 4 turns on EACH end of the 
> 25' HDMI cable between the new digital receiver and the TV.  One toroid 
> on either end was not sufficient.  None of this was necessary with the 
> previous units, which were android units.  The same cables were used in 
> the new installation.  None of the receiver peripherals were changed. 
> All speaker leads had previously been wrapped on 1-5/8 ID type 31 
> toroids.  I still wish I had the old android units.  73, Jim
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