interference

  1. SpaceForceCmdr

    Help with RFI coming from my PC please!

    I've been getting a low, pulsing hum on certain stations (happens a lot around 4840 and the surrounding areas). I was pulling my hair out, but I think I figured it out. It's not interference from my home electrical system or various electronics: it's my dang PC! I connected my SDR (HF+...
  2. W2GLD

    DMR CAP+ system causing interference on GMRS 462.7000 MHz in Chelsea area

    Trying to hunt down ongoing interference from some jack-wagon who put a DMR CAP+ system control/rest channel on GMRS frequency 462.7000 MHz in the Chelsea area, near Old US 12 and Main Street... The system is broadcasting site 1.1 with a color code 1, LCN 7 & 8 with no station identification...
  3. C

    Wouxun Wouxun KG-UV9D+ interference while scanning

    Hello all, I've got a KG-UV9D+, and am noticing that while scanning on both channels, it will sometimes run into what I can only reference as a "collision". I've narrowed down a specific example to show what I'm finding. Channel A is on 436.76500 MHz Channel B is on 406.02500 MHz Channel A...
  4. dnadareski

    Wouxun Wouxun UV-9D Mate Radio is picking up lots of interference

    I just bought the Wouxun UV-9D Mate from BuyTwoWayRadios. It is a great radio, but it has some issues I noticed immediately. I have other Amateur Radios on 2 meter and 70cm and this is the only radio that breaks squelch with CTCSS Tone Squelch Set on several frequencies with data sounds. It...
  5. 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...
  6. 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...
  7. 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...
  8. 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...
  9. 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...
  10. 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?
  11. 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...
  12. 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...
  13. 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...
  14. 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...
  15. 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???
  16. 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...
  17. 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...
  18. 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...
  19. 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...
  20. 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...
Top