[RFI] Resolving RFI to a DSL Modem

Jim Brown jim at audiosystemsgroup.com
Sat Mar 21 17:55:43 EDT 2015

On Sat,3/21/2015 9:06 AM, Adrian Flynn wrote:
> Why not use "Snap on Chokes"?
> Put as many in series as needed.

Because snap-ons with a single turn have a low Q (broad) self resonant 
(lossy peak) in the VHF spectrum, and are inductive in the 1-3 MHz range 
used by DSL. this makes them ineffective at these frequencies. We're 
looking for a high value of resistance, not inductance. Study 

73, Jim K9YC

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