Part 15 FM broadcast transmitter. With a good directional antenna, it would probably reach your house:
Amazon.com: Whole House FM Transmitter 3.0www.amazon.com
12/5 volts DC. Not sure about the ERP limits under Part 15, though.
Beware, there are a lot of non-certified FM broadcast transmitters on Amazon that would not meet the FCC requirements.
Great resource site, thanks for posting!Here is the software I was thinking of, that you could provide an audio feed from a remote receiver.
How can you trick a commercial radio into operating that way? I think it would be tricky to set up a computer alert based on something like this but certainly possible.NOAA used to send out an alert tone that would trigger older receivers. It's not hard to trick a commercial radio with 2 tone paging capability into recognizing that tone and opening the audio for a set period of time. Then all you'd have to do is feed the audio via IP connection down to your house.
So the receiver in the house wouldn't be playing static all the time because the transmitter on the hill is transmitting silence all the time? Since it would be on in the house 24/7, how silent do you think it would be if I kept the volume high enough for an alert to wake me up?I would think if you placed a programmed WX alert radio on hill, quiet unless activated. Low power transmitter aiming down into the valley with VOX set on transmit. Receiver would be quiet then you would hear the message just like if the receiver was in the house. You wouldn't have a warble type alert but increasing the volume would work.
It's just too far all the way up there.Run a cable up to the top of the ridge to an antenna?
The problem there is practical monitoring and alerting. If I'm understanding correctly this would be a continuous stream of audio over the network. A weather radio will silently wait for an alert on the WX band and trigger an alarm once it is received.A couple of solar panels, a deep cycle marine battery, a Raspberry Pi, SDR dongle and a wireless access point back to the house would work. Might cost a couple hundred $ and you would have much more than just a WX receiver.
These sound interesting but I don't have the skills to hack an NOAA receiver or design/build an upconverter and downconverter. An outboard SAME decoder could be interesting but I'm not sure if the pieces fit together to allow for silent monitoring from the house.There are some outboard S.A.M.E decoders for broadcasters that can be installed at your home and connected to some "other band" receiver that picks up a relay of the NOAA audio from the hilltop. But they are not cheap and you can hack a cheap NOAA receiver to utilize its SAME decoder and audio circuitry by breaking the discriminator line.
1) At hilltop, Crossband repeat NOAA audio via a low power MURS or 900 ISM band (baby monitor) transmitter. At the house, tap a MURS or 900 ISM (baby monitor) receiver into the audio and decoder line of a NOAA receiver with SAME circuitry. Basically a hack.
2) At hilltop, receive and upconvert 162.5xx MHz NOAA signal to 915 MHz ISM (752.5 MHz LO). At the house downconvert 915 MHz ISM to 162.5 MHz with same 752.5 MHz LO. This will take some skills and hardware. Do your shopping on minicircuits and ebay, get your soldering iron out. You need filters, mixers, amps and a 752.5 MHz oscillator. Easy peasey.
This is interesting. Why not rebroadcast from the hill on Part 15 FM and do a very low power micro-rebroadcast at my house for my WX radio? I could rebroadcast right up against the radio at some extremely low power. Even better, would it be possible to rebroadcast over a short wire directly to the radio's external antenna input?5) NOAA has 400 MHz link transmitters that are used for the 162 MHz transmitters. If you can tune in one of those links you might make your own very low power 400 to 162.5 MHz repeater NOAA station to service your house.
This is the practical monitoring and alerting problem if I'm understanding correctly. I think I'd be listening to static all day and night.If you need to get NWR alerts somewhere that you can't receive NWR (and a cell phone isn't an option), build a 2 meter or 440 amateur repeater and hook up a NWR to the controller. Don't rebroadcast 24/7 but set the alerts to come over the repeater.
It looks like this is a computer application for taking the WX signal from your radio and alerting you over the internet via SMS or email. There is no cell service at the house but even if there were I don't think SMS is a practical alert mechanism in case there's an emergency at night.Here is the software I was thinking of, that you could provide an audio feed from a remote receiver.
The NOAA SAME alerts are followed by a 1050Hz tone.How can you trick a commercial radio into operating that way? I think it would be tricky to set up a computer alert based on something like this but certainly possible.
NWR is part of the Emergency Alert System, that alert activation would come from state or county EOCs.Where exactly do yo live that you are concerned with Fire Alerts? are you in California or where?
I am not positive that NOAA alerts on fire situations......could be wrong though.
There are no SAME message types for Fire specifically so I'd say they don't include those unless they would send them under one of the Unrecognized message types.
The feds do very few things quickly. Before trying to get some sort of NWR reception set up, since it will not have what you need, wait for the changes to the program. There is a chance that any changes that do happen, if any do, will take a couple years to implement.I heard back from Cal OES:
"Unfortunately local governments cannot broadcast local emergency alerts over NOAA radio at this time. OEM has been informed that this may change sometime in the first half of 2021, however that is subject to change and may take longer to implement (NOAA radio is a federal program)."
It sounds like there's some hope for next year.
How are you connecting your roof mounted antenna to the Midland receiver now from the 75 ohm coax? Are you not using the RCA port?Is it possible to broadcast over a cable? The Midland WR400 WX radio has an RCA jack for an external antenna which would be perfect for receiving the signal that way.