Guys - there is already a system with a "flood of signals " authorized for ADSL and VDSL . They go thru 160 , 80 , 40 every 4 khz (specs say every 4.375 khz) but here in NE Phoenix they are precisely 4.000 khz spacing . I spent 75 days with Centurylink with carriers every 4 khz as loud as -75 dBm .
So here we are almost 2 years later - they ran a new cable and left the old one and stuff hanging down all over the place and I have carriers across 80 and 40 meters - 40 particularly bad as much as -90 dBm - This one is interesting , the comb stops right at the FT8 window .Must be a ham who works FT8 settng freqs. I guess I am the only one in the USA hearing this stuff - RFI reflector was deathly silence when I asked about it . Maybe I am in the midst of the lousiest ; leakiest Clink system in the USA . http://www.joepeesoft.com/Public/DSL_Corner/DSL_Spectra_VDSL2.html#BandPlanUSA ADSL - can use up to 2.2 mhz , VDSL up to 12 and VDSL2 up to 30 mhz in 4.3125 khz "bins Discrete Multitone -- DMT technology . Hank K7HP . ----- Original Message ----- Without question it leaves the gate open for a flood of signals that will do away with ALL weak signal work on that band. Definition of weak signal in this case anything less than an effective ERP less than their tx power out plus antenna gain. And as long as we stay within our license limits we can’t match or make ANY contacts outside of a 20 mi radius day or nite with 1.5 kw and FT8 Forget cw or Ssb. Or any other modes. Make this a great day Dale > On Feb 13, 2018, at 1:36 PM, Roger Kennedy <ro...@wessexproductions.co.uk> > wrote: > > > I don't care that this will never be a practical way of transferring power . > . . > > But aren't any of you guys worried about the fact that their licence allows > them to transmit ANWHERE within Top Band? > > This could be some horrible wideband signal that generates a lot of QRM ! > > Roger G3YRO > > > _________________ > Topband Reflector Archives - http://www.contesting.com/_topband _________________ Topband Reflector Archives - http://www.contesting.com/_topband _________________ Topband Reflector Archives - http://www.contesting.com/_topband