A Ham-Adjacent Portable Radio RepeaterAlthough ham radio offers a wide array of bands to transmit on, not to mention plenty of modes to communicate with, not everyone wants or needs to use all of this capability.
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A Ham-Adjacent Portable Radio Repeater
Although ham radio offers a wide array of bands to transmit on, not to mention plenty of modes to communicate with, not everyone wants or needs to use all of this capability. For those needing simple two-way communication services like FRS or GMRS are available (in North America) with much less stringent licensing requirements, and GMRS even allows repeaters to be used to extend their range beyond the typical mile or so. [Dave] aka [N8DAV] has built an off-grid simplex repeater that can travel around with him wherever he goes.
The repeater itself is based on a pre-built simplex repeater module, which means that it has to record an incoming signal and then play it back on the same frequency. Compared to a split frequency repeater which uses different frequencies for transmit and receive this can be a bit cumbersome but simplifies the design and the use. A Baofeng UV-5R is used to perform the actual radio duties paired to a 40 watt amplifier to extend the range as much as possible. It’s all packed into a Pelican-like case and set up with a large battery that could power it for a number of days, making it useful for camping, rescue, or other off-grid activities.
For those wondering why [Dave] is using his ham call sign instead of his GMRS one, all of the equipment in this build will work in either the UHF ham bands or the channels reserved for GMRS with minor adjustments, so it’s perfectly possible to use the setup for one’s preferred license. And, for those in other parts of the world without GMRS there’s a similar class of radio called UHF CB which might be able to support similar builds, but be sure to check your local jurisdiction’s laws before hooking something like this up. For an even longer-range radio repeater using similar equipment we’d recommend looking to the skies.
youtube.com/embed/_S3fQOkPa9s?…
Thanks to [Red] for the tip!
Gli ultimi otto messaggi ricevuti dalla Federazione
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@ipd @jalefkowit yeah the street flooded and then half-froze and it's snowing again
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@aeva @jalefkowit in a residential wood timbered thing, i think the recommendation is under your kitchen table if it is strong. whatever gets you away from glass is usually good too. your house getting picked up and whisked away isn’t really what you are trying to protect from, its cuts and bumps from flying debris
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Have you looked out the window today?
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@aeva I am super out of practice with this but having lived in a mobile home in North Dakota for a while as a kid- during watch you need to check if the local shelter is open (in our case the trailer park manager's basement), crack open the windows and unplug unneeded electrical appliances and at warning if you could, go to the shelter, if not, sit in the bathtub. I have no idea these days if most of that was actually useful information.
@jalefkowit good luck, that is no fun at all!
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@jalefkowit good luck and god speed
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Abraham Wald would like a word...
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Cosa può offrire l'Europa agli USA, se non obbedienza?
Cosa ha da offrire l'Europa all'Iran se non obbedienza agli USA e la propria irrilevanza?
Così mi chiedo quali possibilità ha l'Europa di intervenire con la diplomazia, se non ha niente da offrire
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Questi bambini non hanno sofferto abbastanza?
