Show HN: I'm launching a LPFM radio station

(kpbj.fm)

43 points | by solomonb 3 hours ago

10 comments

  • Denatonium 1 hour ago
    It's pretty cool to see a licensed, authorized LPFM station being set up by hobbyists!

    Prior to the PIRATE act of 2020, running a pirate FM station was effectively legal until the second time you were busted. Prior to 2020, if you shut the station down after getting your NOUO, there wasn't any real penalty. Teenage me loved this, and my buddies and I had a little irregularly-broadcasting pirate radio station, using a cheap CZH-7C transmitter purchased on eBay. One time we went on air from our high school's cafeteria during a study hall, and surprisingly, nobody questioned anything! We did have Microsoft Sam narrate our broadcast so that we weren't making a ton of noise.

    We never did get our NOUO; instead, we ran into the much bigger reality, which was that none of us had anything of interest to say. After the novelty of hearing our voices on the radio wore off, the transmitter ended up in a closet, where it probably still sits today. Good times!

  • alrs 2 hours ago
    Why do you need a studio?

    If this is completely non-commercial and you have an amateur license you could probably use AREDN as a backhaul instead of HaLow. We've gotten wifi going from a panel in Elysian up to Wilson on AREDN.

    100w from the Verdugos should be pretty substantial. I regularly make 70cm FM contacts on 446.500 from Elysian Park down to San Diego at 5w.

    • solomonb 1 hour ago
      I would be really surprised if we are allowed to use AREDN.

      We need a studio to be able to do live radio shows. Currently our hosts have to pre-record and submit through an online dashboard. The goal is to have a live studio in Shadow Hills where hosts can do their shows, bring on guests, take calls, etc.

      • giantrobot 1 hour ago
        There are many examples of Internet radio/livestreams that do all the live studio work virtually. It would be so much cheaper and more flexible as guests just need a microphone and Internet connection. Getting good audio is not terribly difficult even with a laptop or phone's built in microphones. Positioning and some isolation do wonders for voice quality.
        • solomonb 13 minutes ago
          You are technically correct but taking that approach misses out on the purpose of community radio: community.

          As a terrestrial radio station our goal is to serve and be a member of our the local San Fernando Valley community. Creating a physical space for the radio station is about creating a 3rd space for community members and hosts as much as it is for recording radio shows.

    • mothballed 2 hours ago
      Broadcast radio is, with caveats, prohibited on amateur radio.
    • fortran77 1 hour ago
      You're not allowed to "broadcast" (with a few exceptions) or play music with an Amateur licence.
      • solomonb 1 hour ago
        I think the suggestion is to use AREDN for our backhaul from the station to the transmit site instead of 802.11ah. So it wouldn't be for broadcast per se, but I am still skeptical that is an allowed use for AREDN.
  • raffael_de 3 hours ago
    Clandestine radio stations would make for a nice counter culture. Judging by the website style I think I receive an appreciation for keeping it simple. In that spirit I'd say ditch the internet stream. Stick to FM.
    • solomonb 2 hours ago
      To be clear this is an FCC licensed LPFM station.

      Also I am /much/ more interested in terrestrial radio but the reality is that the vast majority of listeners are online and not using a radio. : (

      • raffael_de 2 hours ago
        I'm probably looking at this a little naive, no doubt. It's just that (in my fantasy) a pure good ole radio could be a great medium for enthusiasts and odd balls (#cyberpunk). But as soon as there is an internet stream then the actual radio is going to be a gimmick. The whole experience changes if you actually _have_ to use a radio to listen. Of course, your audience is limited by design ... so, realistically there just might not be a sustainable audience in your FM radius. Anyway, cool project!
        • solomonb 2 hours ago
          I agree that there is a strong allure to being strictly terrestrial. I actually started such a station 15 years ago under the Part 15 rules for unregulated broadcast band transmission: https://en.wikipedia.org/wiki/KCHUNG_Radio

          Almost immediately (like within the first week or so) everyone involved demanded an internet stream and now that station has two internet streams lol.

          I've been thinking about setting up another part 15 station at my house as a personal project but for something like KPBJ the goal is to be a community resource. Terrestrial broadcast is super important to me and helps cement the station's place in our local community but we also want to be accessible to those who are not in this immediate area or who don't know how to use a radio (yes in 2026 that is an issue!).

      • MisterTea 1 hour ago
        How many listeners actually have a radio these days? How many people under 30 listen to radio? Under 20?
  • bloudermilk 2 hours ago
    Congrats on this! As a born and raised valley kid, I wish this was around when I was living there as a teen.
    • solomonb 1 hour ago
      Thank you! The LPFM license system was started in 2000 so its pretty new.
  • yeahdef 55 minutes ago
    We have one of these in my town, Denton TX. KUZU FM. I think it was one of the first. It was originally a pirate radio station, that went legit with LPFM.
  • abetusk 2 hours ago
    Can you talk about the process of getting an FCC license and other legal logistics to broadcast?

    The technical side, while interesting, is relatively clear to me. The legal side, including cost, is something I have no idea about.

    • solomonb 2 hours ago
      You essentially have to be in the right place at the right time. The FCC releases LPFM channels every year all over over the country. If you have a 501c3 non-profit within the designated broadcast area you can apply for the channel. They tend to award the channels to more established non-profits. There are no filing fees.

      In our case we created the non-profit in anticipation of applying for this license. We got really lucky and no one else applied for the license and it was awarded to us.

      • abetusk 1 hour ago
        Do you have links to resources for people wanting to go through this process?
  • polarbearballs 3 hours ago
    Thats awesome. I'm a huge fan of KEXP and WFMU. I love radio stations like this. I just signed up for your newsletter. I have it on my listen list and will stay tuned here on the East Coast.
    • MisterTea 1 hour ago
      WFMU is fantastic. That was where you heard all the fun weird stuff and WSOU was right next to it playing (back in the day at least) the latest hard core, punk, and metal.

      Fun fact, the Go Gopher drawn by Renee French was originally drawn for a WFMU tee shirt given out at a fun raiser they hosted.

    • solomonb 3 hours ago
      Thanks! We haven't been using the mailing list much, I'm afraid of coming off spammy, but I appreciate the support and hope you enjoy the station!
  • mkprc 2 hours ago
    Do you have a direct link to the audio stream? I'd probably add it to my go-to list of stations.
    • solomonb 2 hours ago
      https://stream.kpbj.fm

      At the moment we are only airing a few new shows per day and filling the rest of our airtime with content from archive.org and other free sources (chosen by all our hosts), but over time more of the schedule will fill with original content.

  • edoceo 2 hours ago
    How does licensing work for the music you play?
    • solomonb 2 hours ago
      For terrestrial broadcast or online? You go through a handful of music industry organizations such as ASCAP and BMI. For terrestrial broadcast the costs are scaled to approximate listenership.
    • josefritzishere 2 hours ago
      They just pay into ASCAP, BMI and SESAC. The royalty groups disburse on estimated airplay. Non-coms pay a reduced rate. I can go mch deeper if you want. I used to work in that field.
  • josefritzishere 1 hour ago
    KPBJ should have co-channel interference from KAIA and KCAQ, but the first adjacents are pretty clear. an LPFM has no protected contour. How is the local signal?
    • solomonb 37 minutes ago
      Great question, sadly we haven't gotten to the point of operating our transmitter yet so we don't know if co-channel interference is going to be a significant issue or not. I can say tho that neither KAIA or KCAQ come through clearly within our contour.
      • empressplay 2 minutes ago
        Test it ASAP -- I'm an 80s/90s kid, I loved Pump Up The Volume and I did a little umm broadcasting of my own (so I love your vision) but I would have concerns that even if the larger FM stations aren't coming through there can still be enough power there (you should be able to test that though) to nix out your low-power signal.

        Also:

        > Stations authorized in the LPFM service will operate with effective radiated

        > powers (ERP) between 1 watt (0.001 kW) and 100 watts (0.100 kW). In any case,

        > the distance to the 1 mV/m (60 dBu) contour from an LPFM station or

        > application will not be permitted to exceed a reference distance of 5.6 km.

        Your area map seems a little big(?)

        Good luck!