DSL Filters Good For HF RFI Supression?

[AJ1G]

Just switched today from ATT ADSL/Dish Network/Landline to Comcast Xfinity Cable Service.  Wow, what a difference on download speed...20 MBPS from a max of 2.5 MPBS to (usually) less than 1 MBPS!  Wondering is I should leave the DSL filters on the landline phones in the house, will they be of any use for RFI suppression of my HF transmissions?

[Jeff W9GY]

I have used DSL filters in phone lines and found them to be excellent in keeping 160 M signals out of phones.  I'd say leave them in the phone circuits.

[KA0HCP]

Well, they are meant to be low pass filters for audio frequencies, while the DSL uses higher frequencies but still much below RF, in the kilohertz range. 

[W1RKW]

When my house was built I had CAT 5 installed for network and phone through out. I have a DSL so have a DSL filter that serves everything at the service entrance and splits phone from DSL.  With the DSL filter and CAT5 cable my phone RFI issues have pretty much been non-existant.

[W1AEX]

I would agree with Jeff, they are excellent for keeping 160 meters out of the phone system. They typically have a heavy lump of series inductance in both the tip and ring lines and a .001 across tip and ring. In my house, that snuffed out any RFI from 160-40 meters running full legal limit. Nothing heard when running on 10 meters at +150 watts AM or on 6 meters while running 100 watts. I also did what Bob did and ran CAT-5 instead of CAT-3 and that really added a lot of immunity too. Being curious, I did take one apart, and looked at it along side a crappy Radio Shack phone RFI filter (which didn't work on 160 meters). The DSL filter looks quite a bit more substantial.

Rob W1AEX

[Opcom]

Splitters work well too and the "DSL" port should be terminated with a 100 Ohm resistor to take the place of the missing MODEM.