Sounds to me like local oscillator or one of the mixer oscilators is leaking back through the antenna jack.
If it is a 'hash' that could also be a switch mode power supply making the interference, but that is usually only a problem on 80m, unless the SMPS is on 600kHz, in which case as soon as the transmiter keys they mix and you get garbage. I saw a report where a guys TV was interfering with the national distress channel on VHF and they made him shut it off and never turn it on again. Luckily the manufacturer replaced it as 'Defective'. On 3/11/08, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > At 3/11/2008 02:20, you 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. > > > Is the interfering signal ~1.5 kHz above or below your input? If so, it's > the 38th harmonic of the horizontal sync. of the TV mixing inside the TV > with your output & landing on your input. Had this happen with a security > camera once. > > Bob NO6B > > > > > > > > Yahoo! Groups Links > > > >
