I need a little help here. I recently installed two antennas in my attic (an modified RS mag mount and a Diamond D-130J). I ran two separate RG-8X cables down from my attic to my listening post in my basement. Both cables are run side-by-side coming down from the attic to my shack. I have a 780XLT hooked up to the RS antenna and a 996T hooked up to the Diamond lead. I'm getting interference on the 33MHz band to the 996T and it varies which frequency the RF comes in on (I'll get it on 33.50 and 33.56 but not 33.52 or 33.54). If I turn the squelch all the way up I still get the interference.
Same thing with the 780XLT but it RF comes in around 46.16 up to about 46.22 but if I cut the squelch the interference is squelched. I then took each scanner and hooked them up to the other antenna. Same results with the opposite scanner. Also if I turn the squelch down I do get the interference on both 46 & 33 MHz ranges s previously described.
The scanners are near my computer and I have traced the majority of the interference on the 33MHz band to the computer. However once I disconnect the coaxial lead to either scanner and run it without an antenna, I do not get any interference even if I have the squelch just barley up. I put a wick antenna that comes with the scanners on it and I get the interference back. t seems that with running both scanners with their wall warts and having the coaxial hooked up to the ANT jacks, I get the interference. SO for ha-ha's, I decided to run an extension cord from another room's outlet (different electrical circuit in the house) had the 780 and 996 hooked up to the original antennas as I state above and got the interference again.
Now here's the kicker, I have a portable scanner (396T) and I ran it on batteries and was able to trace the 33MHz interference to the computer and also my monitor (CRT). I would have to put the antenna sort of close to either unit to recreate the interference. I think the 46MHz interference may be coming from by cable modem or router (hard wire only) but I couldn't replicate this interference with the portable radio.
So then I hooked the portable scanner up to each of the leads and ran them for a while and did not get any interference over it, basically picked up everything okay during a service search of the VHF and UHF bands.
I'm at a loss. Any suggestions???
Izzy
Same thing with the 780XLT but it RF comes in around 46.16 up to about 46.22 but if I cut the squelch the interference is squelched. I then took each scanner and hooked them up to the other antenna. Same results with the opposite scanner. Also if I turn the squelch down I do get the interference on both 46 & 33 MHz ranges s previously described.
The scanners are near my computer and I have traced the majority of the interference on the 33MHz band to the computer. However once I disconnect the coaxial lead to either scanner and run it without an antenna, I do not get any interference even if I have the squelch just barley up. I put a wick antenna that comes with the scanners on it and I get the interference back. t seems that with running both scanners with their wall warts and having the coaxial hooked up to the ANT jacks, I get the interference. SO for ha-ha's, I decided to run an extension cord from another room's outlet (different electrical circuit in the house) had the 780 and 996 hooked up to the original antennas as I state above and got the interference again.
Now here's the kicker, I have a portable scanner (396T) and I ran it on batteries and was able to trace the 33MHz interference to the computer and also my monitor (CRT). I would have to put the antenna sort of close to either unit to recreate the interference. I think the 46MHz interference may be coming from by cable modem or router (hard wire only) but I couldn't replicate this interference with the portable radio.
So then I hooked the portable scanner up to each of the leads and ran them for a while and did not get any interference over it, basically picked up everything okay during a service search of the VHF and UHF bands.
I'm at a loss. Any suggestions???
Izzy