1. Dispatrick

    Can anyone identify this interference sound?

    For years I've been getting major interference on the lower VHF band around my home indoors and outdoors and around a few house vicinity on my block. Most of the time it sounds like an "open carrier" on hundreds of frequencies in the lower VHF band, however within the last few months I now hear...
  2. S

    Interferance between two Digital channels on different Time Slots

    Hi everyone, We have upgraded lately our repeater (SLR5500) from Analog to Digital and now we are on DMM mode and using two Digital channels on this repeater by using different time slots (1 & 2), but with the same color code. Now the users are complaining that sometimes an interference is...
  3. S

    MotoTRBO DP series: Radio Front LED Blinking Green

    Hi everybody, We are using MotoTRBO DP series radios with VHF frequencies, and the frontal LED is blinking from time to time with Green color even if there was no one PTTing. The scanning feature is not enabled, so what could be the reason that the radio blinks, does that mean it is detecting...
  4. T

    RF Interference and Hybrid Vehicles

    Hey All, Ed (WRCQ448 on GMRS here) I have a really dumb question. I have a close friend (ham op) who is having a big issue with his vehicle pretty much being a faraday cage. It’s a Subaru Crosstrek Hybrid. When it switches to hybrid mode pretty much any radio signal that’s not AM/FM/HD cuts...
  5. C

    Interference with MotoTrbo on MTR3000 VHF

    I have exceeded my knowledge level. My FD runs a VHF MTR3000 in Trbo mode and we are having problems. We changed to Trbo then soon after replaced heliax and antenna due to water tower sandblast an repaint and a 25+ year old antenna. We cover a city of 4 Sq miles and have been having...
  6. Dispatrick

    Open Carrier Med-10 for over a week now.

    Open carrier on Med-10 for over a week now 462.9750 with a PL of 146.2. I'm posting this here cause I live in Bergen County, however it could be originating from NY or CT. A check of the database shows no user with that PL. Any Ideas?
  7. E

    Interference Sound on UHF Freq

    If this thread better belongs somewhere better, moderators feel free- I'm listening to a local business on one my of my Motorola P25 handhelds but I've cross tested this frequency on a few of my other radios that include Kenwood and the same thing happens where, ever so often, an interference...
  8. R

    RF Noise

    I recently put a 29 LX in my truck as well as a mag mount Wilson 1000. With the truck not running, there is hardly any static even with the RF gain cranked up. But with the truck running, the only thing I hear is a popping or cracking sound that's relative to engine rpm. I disconnected the...
  9. E

    Sweeping Sound on Scanner Listening to Local Police Dispatch

    I've been monitoring my local police dispatch frequency for my city which is obviously on a repeater. Each time someone talks, whether it be a dispatcher on a base station or a police officer on their mobile/handheld, there is this constant "sweeping" like sound. Like the sound a broom would...
  10. Z

    Frustrating mid VHF interference

    I have been experiencing interference that looks like wide-band data bursts from 120MHz - 150MHz+ which is destroying my NOAA APT captures. Here is a YouTube video of it happening: What its not: - My phone or router (tested LTE/2.4ghz/5ghz/Bluetooth) - My PC directly (only happens on outdoor...
  11. akafnulnu

    Springfield Fire

    Have been getting interference on Springfield Fire 154.175. Anyone else? I have an APX and an XTL and receive on both. Any suggestions???
  12. S

    Interference parameters based on technology

    Dear All, I am new to spectrum monitoring and would like to know which parameters are important with respect to a government regulator when scrutinizing the interference complaints received from cellular operators. After much research i came to know that in case of interference in 3G...
  13. P

    Simplex radio interference concern

    Hello everyone, I am working on an LMR radio project near the NYC area. The goal is to extent the two way radio coverage from an existing site via a hybrid DAS system to a large warehouse environment using GTR8000 base stations to generate the many simplex VHF frequencies for the client's LMR...
  14. T

    Scanner Interference

    Hi all, I have a narrowbanded Yaesu FT-2900r that I have scanning some railroad frequencies in the area and within the past year, it has started to develop this unusual interference. I've included a link in this post so everyone can take a listen. The entire setup consists of a dpdproductions...
  15. J

    What's possible with this setup? How/when to improve?

    I've just started exploring radio, and I'm totally captivated by how it works and what you can do with it. Unfortunately, I'm so new, I don't know if my setup is working well - maybe I'm doing something stupid like using the wrong antenna and don't know it - so I'm asking for some general...
  16. T

    Need help with good frequencies for a security team!

    Hi, I am located in cass county, MO. I do church security and I am in need of some good frequencies to use. The main radio the team uses is the Baofeng BF-888s and I personally use the UV5R. We need something that will work well through brick walls and auditoriums and be legal, plus we need as...
  17. B

    bcd325p2 computer interference on railroad

    I just recently purchased a bcd325p2 and I have been trying different bands and systems with it. Most work just fine. But for railroad, which I really want to listen to, the whole band goes silent when I turn on my home build desktop computer which I built a couple of years and has a top of the...
  18. M

    ICOM-R75 power supply causing interference to itself?

    Hi all, I became the owner of an ICOM-R75 awhile back, great radio, love it. There seems to be one problem though... Right now the antenna I'm using on the R75 is a Par EndFedZ, seems to work well with the radio, it is strung up about 45 feet. But when I'm scanning through frequencies, every few...
  19. BlueDevil

    158.9400 Interference

    Trying to find the station/transmitter causing interference on 158.9400MHz possibly operating out of North Central Idaho or the Idaho Panhandle. The station is transmitting with a CTCSS Tone of 179.9Hz. No voice is ever heard and no CW ID or other station identification is heard. All I can hear...
  20. BlueDevil

    Motorola XPR8300 background noise/interference

    I have a Motorola XPR8300 VHF Analog Repeater without an external power amplifier that all of a sudden has a lot of background interference or noise. The repeater is on a mountain top however a long ways from any other transmitters. It is the only radio repeater at its location. It is used for...