Post AcjlP2KBtCIKIw6uOW by ndz@noagendasocial.com
 (DIR) More posts by ndz@noagendasocial.com
 (DIR) Post #AcjULAPkAjUj0yHE9Y by tek_dmn@mastodon.tekdmn.me
       2023-12-12T02:59:10Z
       
       0 likes, 0 repeats
       
       Okay, #AmateurRadio math time.Anyone know roughly how far a UHF (440) signal can travel, 40W of power, end-fed half-wave vertical mounted above the metal roof of a 1-story house? We're on the city limits so there's not much obstruction.I'm not looking for exact answers, I'm just trying to calculate if 40-50 watts of power is enough to reach the neighboring (30 miles) city.For bonus points: assume I'm on a 5W HT. You think there's enough rx gain to even hear an HT 30 miles away? Or would I have to bounce through the 50W tx in my car as an amplifier to even try that.#HamRadio
       
 (DIR) Post #AcjULBYztoUUZxc8DQ by ndz@noagendasocial.com
       2023-12-12T12:04:35Z
       
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       @tek_dmn What type of coax and length of coax run?  Minimize your loss.Height of both antennas is important.Any web SDR's nearby?  Listen to your signal and see how many repeaters you can key up.
       
 (DIR) Post #AcjULC5xvErWED2SbQ by tek_dmn@mastodon.tekdmn.me
       2023-12-12T03:04:32Z
       
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       Full context, I'm debating using a 578 as a home base station VHF/UHF rig, but that is only spec'd for 50 VHF watts or 45 UHF watts.I don't think a VHF/UHF amplifier that has the T/R switching time needed for DMR† that pumps 100-200 watts is reasonable... Probably already into 4-digit cost territory.So basically it's a question of "do I makeshift a mobile into a fixed, or do I just buy a fixed V/UHF fixed xcvr" that's gated behind "is this enough power"
       
 (DIR) Post #AcjULDZQRC1OnrpVA0 by tek_dmn@mastodon.tekdmn.me
       2023-12-12T03:05:56Z
       
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       †: I know that DMR isn't a necessity here. But I'd rather use my equipment to the fullest and if I couldn't do that I'd just ditch the 578 for a fixed rig anyways.
       
 (DIR) Post #AcjkbX0ZXC3UzMKPEO by tek_dmn@mastodon.tekdmn.me
       2023-12-12T15:06:48Z
       
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       @ndz since this is all the planning before building something that's...Coax, noneRepeaters, none(And I don't think there's many WebSDRs around here anyways)
       
 (DIR) Post #AcjlP2KBtCIKIw6uOW by ndz@noagendasocial.com
       2023-12-12T15:15:46Z
       
       0 likes, 0 repeats
       
       @tek_dmn I do a lot of weak signal VHF/UHF and the biggest improvement I found was switching to low loss coax for my 100ft run to the antenna.Should be do-able. Good luck!SDR map is here: https://www.receiverbook.de/map
       
 (DIR) Post #Acjv66Wn2LB5NccAqm by tek_dmn@mastodon.tekdmn.me
       2023-12-12T17:04:22Z
       
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       @ndz Literally none in the entire state... Go figure.