[RFI] ADSL2+ modem crashing solved using power line filter and choke

[Bob K6UJ]

Kirk,

I just had the same modem installed.  I will see if it is affected by 160M.
Thanks for sharing this info !

Bob
K6UJ

On 6/2/16 7:37 PM, Don Kirk wrote:
> For many years I have had AT&T DSL service and had to use a home made
> filter (designed by OZ1CTK) on the phone line feeding the the DSL modem in
> order to prevent the modem from crashing when transmitting on 160 meters
> (running 100 watts).
>
> Today AT&T switched me over to their Uverse service which I believe is
> ADSL2+ based on what the technician told me, and as soon as I started
> transmitting on 160 meters running 100 watts the new ADSL2+ modem would
> crash.  We tried using my OZ1CTK ADSL filter, and as I suspected it did not
> allow the new modem to operate properly (no internet connection).  I then
> decided to try some filtering on the power line cord that feeds the power
> supply for the new ADSL2+ modem, and to my surprise my new modem so far has
> been functioning fine (no longer crashing when I transmit on 160 meters).
> The new Modem is a Motorola NVG580, and my filter on the 120 volt power
> line  feeding the NVG580 power supply consists of a commercial EMI filter
> (Delta Electronics 10DRCG5) and 14 turns of the power cord wound on a 2.4"
> OD Fair-Rite #31 mix toroid core (based on the K9YC hams guide to RFI
> document).
>
> Just FYI,
> Don Kirk (wd8dsb)
> _______________________________________________
> RFI mailing list
> RFI at contesting.com
> http://lists.contesting.com/mailman/listinfo/rfi
>