[RFI] RFI on New Digital TV

[Jim Brown]

Hi Jim,

Has nothing to do with digital, has everything to do with Pin One 
Problems. There's a lot on my website about it. I have no issues with a 
Sony I bought about 15 years ago.

General rules of thumb. Concentrate on the best RX antennas -- input 
from cable box, for example. Note your frequencies that excite it, 
tailor chokes to those frequencies. Buy a bunch of #31 clamp-ons, 3/4-in 
i.d., and some 1-in i.d. for larger cables. Pin One problems are not in 
any way logical as to how functions are affected. Choke both inputs and 
outputs. I suggest disconnecting various I/O cables until the RFI goes 
away or gets better. Remember that chokes are broadly resonant -- 5 
turns through one of those cores is a good starting point for 40, 20. 
Fewer turns for for 15, 20. For 2.4-in toroids, follow guidelines for 
RG400 TX chokes.

If you bought the TV from Costco, take it back. :) When I buy anything 
that could have RFI or other issues, I buy it from Costco.

73, Jim K9YC

On 5/20/2025 10:49 AM, Jim McCook wrote:
> Have any of you recently switched from an analog TV to a new digital 
> model?  If so, have you experienced any new problems with RFI?  My not- 
> so-old 65" Sony LED TV power supply failed, so I got a nice 65" LG 
> digital model, which required changing the main receiver with a new 
> Yamaha digital model. Previously I had no RFI in the TV, but with the 
> new arrangement it's a nightmare.  I have tried using ferrite everywhere 
> on both units with no results.  Without getting into the usual 
> approaches on how to stop the RFI, I simply wonder if this is a problem 
> with newer DIGITAL models?  I sure wish I had an analog TV again!   73, 
> Jim W6YA
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