Fortunately I have a Wi-Max service that is immune from RFI but I frequently use a DSL service for remote control with guest ops during contests. The DSL is more reliable in so much is I get 1.5 Mbps
Herb, I had exactly the same problem, tried the same "cures" you have. The problem is ADSL uses frequencies up to 1.1 MHz. The modems are easily overloaded by 1.8 MHz RF. Nothing worked until I buil
Hi Herb Thanks for the dozens of Q's on top. I solved this exact problem by blowing up the DSL modem on 160 and ACS came out with a new one they said was more RFI proof and it was. Westell is on the
Looks great, Paul. Thanks for posting this. This is a differential mode filter, so it suggests that some or all of the telco cable feeding the modem isn't twisted pair, or isn't very good twisted pai
Herb (& others) I struggled to keep my 160- and 80-meter RF out of my DSL equipment for a number of years. Multiple turns of all cables in/out of the DSL modem (Siemens Speedstream) on #31ferrites, e
Herb, The problem usually comes from the wall wart with RF getting into the power supply lead. Most modems us an external PS such as the infamous wall wart. Try wrapping the PS lead around the ferri
Thanks to all who responded with suggestions. It is interesting that nobody suggested the K-Com or K-Y filters. I looked up the Westell 7500 and see that it is a modem router with no provision for a
Thanks Jim. I should probably have added the rest of my story. Along with the common mode chokes (which I believe were 16 turns on a 2.4" #31 core, with several in series), I also replaced the wire f
Herb, ADSL, which sounds like what you have, has carriers right up to mid broadcast band or so. The upper frequency carriers that go up above 1 MHz are the from the modem to your house, while stuff d
Hi, I have this knock out problem, tried ferrite beads, ferrite cores, coils, vodoo, black magic... I came to conclusion that some devices are really built not caring for RF exposure. Two different r
With AT&T Uverse I had the experience of adding common mode chokes (#31 ferrite) on a long run of cat 5 and having it knock down the desired signal. The cat 5 is not all that well balanced, and putti
Thanks to all who replied with ideas to make TB operation possible with a DSL here. It appears that some boxes are better than others so I am starting to compile a list of the good ones. I am also pl
Herb, On the recommendation of John G3PQA, I recently changed my router from a D-Link unit to an ADDON NWAR-3670 which appears to have much better RFI immunity. I'm not getting any dropouts at all no
I've never had the problem with the Draytek I bought some years ago to overcome the problem of a weak signal at the end of a long line from the exchange. Previous modems needed rebooting after any ac
VDSL as used in AT&T Uverse and others employs a string of carriers from 147 kHz to 7.9 MHz every 13 khZ. Each of these is a data carrier for 1-13 data bits. In the extended handshaking between the r