All very good suggestions! I can, and will set-up a time with them to try these things out!
--- In Repeater-Builder@yahoogroups.com, "wb7cjq" <[EMAIL PROTECTED]> wrote: > > This might sound too simplistic, after reading some of the other > responses. Is the TV grounded??? A lot of them just have a > polarized AC plug, not a grounded (3-pin) plug. AND, along the same > lines, is the AC outlet grounded??? I've found several 3- > pin "grounded" outlets in our house that have only a 2 conductor > cable feeding them!!! Might be worth a look. > > If the TV is looking for a ground, and assuming the dish is properly > installed (grounded), then the TV might well use the coax shield as a > ground, and at that point the coax shield could potentially radiate > the Sony's internal noises right to the roof. This would be easy > enough to check with a VOM and a cooperative owner. > > Would it be possible to disconnect everything but power from the TV > and see what happens??? Not to get too radical here, but could you > perhaps wrap the TV in 'grounded' tin-foil for a couple of minutes > and see if that knocks the interference down to below your noise > threshold??? That would be quick and dirty, but it might well save > you a lot of grief in putzing around with someone else's TV. > > Could you move the TV to a different foom for testing? Or perhaps > run an extension cord and power it from a different outlet? Just to > start crossing things off of the "list"... > > What about taking a walkie to the TV and "snoop" your repeater input > frequency and try to localize the source of the noise? You might get > lucky and be able to determine if the noise is going out via the AC > mains, or is actually being radiated from internal component that is > trying to be a 2-meter antenna. > > 73, > > Dave. > > --- In Repeater-Builder@yahoogroups.com, "raritansailor" <mkhess@> > wrote: > > > > Hi Folks, > > > > Here's a new one for me. In the same building as one of > > our repeaters there's a Sony TV hooked up to Dish/Echostar. > > The repeater is on 147.345/945. When anyone turns on the > > Sony TV hash is produced on the repeater input and locks > > up (keys) the repeater. It does not matter if the sat rcvr > > is on, off, powered off, or disconnected. The TV itself > > is producing the RFI. > > > > I put a DCI bandpass filter on the repeater input, but no joy! > > Yes, it would probably help if there was a PL on, but all that > > would do is keep the repeater from keying, not stop the noise > > if it was in use, or stop it from being "desensed" by the noise. > > (or at best the recieve ability dergraded). > > > > Any Ideas how to stop the noise at the TV? > > > > Regards, N3EAQ > > >
