There are some interesting things going on in the Cross Country Wireless group with phased loops. Look for Simon about half way down this link: https://groups.io/g/CrossCountryWireless/topic/79362931#7537
He tells us that he works across the pond on his multi-turn transmit loop and now has 4 phased loops for receive working very well in his crowded London area. David G3UNA/G6CP > On 04 January 2021 at 12:33 Paul Mcl <[email protected]> wrote: > > > Roger, > > It’s not just the VDSL noise but the SMPSU’s as well that give me grief > round here. VDSL affected 30m most as I have overhead poles in my back > garden so limited option to escape. VDSL cabinet was a street away. > > I found the RX loop (Wellbrook) worked poorly near the house and put it > outside where it performed much better also with a rotator but agree EW > would be my preference if I had to choose a fixed position. > > I also tried with 2 short terminated beverages each 40m long running along > a garden wall EW. They worked ok and complimented the RX loop to give me > better coverage. I can’t say they were excellent as comparing in a noise > free option was a choose but I used them for a couple of seasons before I > changed to remote RX in a field a couple of hundred metres away using a > WiFi link where I put out 2 x 200m long beverages in a lot quieter location. > > It might vary at your QTH but worth trying as putting up a short beverage > temporarily to try as it won’t break the bank. > > Regards > > Paul MM0ZBH > > > > On Mon, 4 Jan 2021 at 12:03, Roger Kennedy <[email protected]> > wrote: > > > > > The major source of noise on Top Band (and 80 & 40m) here in Britain these > > days comes from VDSL Broadband hash. The problem is that almost every house > > has an overhead copper phone line going to it . . . so the Service Provider > > runs Fibre-optic lines to a Cabinet in the street . . . but then uses the > > ordinary un-screened cables phone cables that run up the wooden Telegraph > > Poles, then across to about ten houses . . . and the same all along the > > street. > > > > Those phone wires act as fantastic antennas radiating the hash! I have > > found > > with my 160m Mobile setup that you have to get a couple of miles from any > > phone wires before the noise level starts to drop - which is almost > > impossible ! > > > > I have been told that the Service Providers COULD turn off the carriers > > that > > are in the various Amateur Bands, which would eliminate the problem . . . > > but they refuse to do so, as that would obviously reduce customers' > > broadband speeds. Despite numerous complaints to the Regulator (OFCOM) > > nothing has been done, as the Service Provider denies that there is a > > problem ! > > > > Many people have S9+ noise levels from the VDSL . . . I'm lucky in that > > this > > is a new street, so the phone cables are underground . . . but there are > > still overhead wires at the end of the street, 100 yards away, which gives > > me an S6 noise level in an SSB bandwidth. (my Receiving Loop in the loft is > > turned to null out the noise, but only drops it about 6dB . . . fortunately > > that's pointing East-West, which is a pretty good direction for most DX) > > > > So my question is this . . . surely even a Beverage is going to pick up > > this > > hash, as it will always be pointing at some phone wires? > > > > I know very few British Topband DXers can put up a Beverage, as most of us > > have pretty small gardens (myself included, so this is a purely academic > > question) . . . but would be interested to hear any comments. > > > > Roger G3YRO > > > > > > _________________ > > Searchable Archives: http://www.contesting.com/_topband - Topband > > Reflector > > > _________________ > Searchable Archives: http://www.contesting.com/_topband - Topband Reflector _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
