Happy Belated Thanksgiving!
I need some help with interference issues while streaming marine radio near an antenna farm. The scanners are picking up strong interference from NOAA weather radio, a ham radio repeater, and possibly a pager transmitter. It seems like intermod is causing trouble.
Right now, I'm using an old Icom IC-M57 marine radio (don't worry, it's in a locked cabinet to avoid accidental transmissions). It's better than a scanner but still has some scratchy noise in the audio. The noise doesn't break the squelch, and it doesn't happen when the radio is receiving a transmission.
The setup is in a room with a furnace and Ethernet gear, using a Tram discone antenna. Since ham and NOAA frequencies are close, I'm not sure if switching to a marine antenna or using a bandpass filter would help. I've also put a 20-pack of ferrite chokes on all the cables I could find.
I'm thinking the noise might be inside the radio, so I'm looking to replace it. The challenge is, new marine radios don't have a 1/8" audio out, and they often need GPS and MMSI. I've checked Icom and Standard Horizon, we're willing to pay for quality.
I'd love to hear if anyone has dealt with a similar issue and what they recommend. I'm open to new or used products—communication receivers, marine or ham radios (preferably with removable microphones), or SDRs. Any suggestions would be helpful.
Thanks!
I need some help with interference issues while streaming marine radio near an antenna farm. The scanners are picking up strong interference from NOAA weather radio, a ham radio repeater, and possibly a pager transmitter. It seems like intermod is causing trouble.
Right now, I'm using an old Icom IC-M57 marine radio (don't worry, it's in a locked cabinet to avoid accidental transmissions). It's better than a scanner but still has some scratchy noise in the audio. The noise doesn't break the squelch, and it doesn't happen when the radio is receiving a transmission.
The setup is in a room with a furnace and Ethernet gear, using a Tram discone antenna. Since ham and NOAA frequencies are close, I'm not sure if switching to a marine antenna or using a bandpass filter would help. I've also put a 20-pack of ferrite chokes on all the cables I could find.
I'm thinking the noise might be inside the radio, so I'm looking to replace it. The challenge is, new marine radios don't have a 1/8" audio out, and they often need GPS and MMSI. I've checked Icom and Standard Horizon, we're willing to pay for quality.
I'd love to hear if anyone has dealt with a similar issue and what they recommend. I'm open to new or used products—communication receivers, marine or ham radios (preferably with removable microphones), or SDRs. Any suggestions would be helpful.
Thanks!
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