Jump to content

Leaderboard

Popular Content

Showing content with the highest reputation on 06/15/24 in Posts

  1. JohnE

    Cable types and losses

    been meaning to put this out there for a while,since I have had a few conversations about this w/various members. first pics,cables from L-R w/associated N male connectors. RG8/213 LMR400 type, 1/2Inch superflex, 1/2inch hard line also known as Heliax, 7/8inch hard line. [ MyGMRS STAFF EDIT: 3 Photos no longer available from linked source.] now lets talk about the losses in Db and how much power that is. Cable type loss at 100Mc 400Mc RG8/213 2.0dB/100' 4.7dB/100' LMR400 1.2 2.5 Hardline type 150Mc 450Mc 1/2" superflex 1.3dB/100' 2.3dB/100' LMR600 1.0 1.7 1/2" Heliax 0.85 1.5 7/8" Heliax 0.44 0.8 1-1/4" Heliax 0.3 0.6 dB loss power loss in % 0.5 10 100W in 90W out 1.0 20 1.5 30 2.0 37 2.5 44 3.0 50 3.5 56 4.0 60 all of the above loss specs are manufacture specs, I strongly suggest that you measure your line loss w/watt meter if possible to know exactly what you are getting at the antenna. IME most of the book specs are on the money for hard line ,RG8/213 can be a crap shoot depending on manufacturer. I've had some really bad and some pretty good. LMR I've had a love/hate relationship w/, good cable but seems to be prone to moisture issues. wish I had pic of the 7yr old cable that pretty much self destructed. hope this is of some help to those looking to put up a machine or control station in the future. JE ***EDIT*** found this very useful http://www.arrg.us/pages/Loss-Calc.htm
    1 point
  2. SteveShannon

    Cable types and losses

    Measure SWR right at the antenna instead of at the radio to see what it really is.
    1 point
  3. It looks the same as every other UV-5G variant, I doubt you missed anything. Baofengs are like cockroaches
    1 point
  4. It works. Users just need to be sure to select the correct radio brand/model options based on the firmware loaded to the active profile on the radio.
    1 point
  5. DenMRadio

    H3 memories

    That sounds like how my TD-H8 works. The only customizable GMRS channels are 31-52. Memories above that are receive-only. Again, this is on the TD-H8. I don't know about the H3. Channels 1-30 are the standard GMRS channels, with unchangeable frequencies. The manual says nothing about this but it's on their website. Hopefully we can get another H3 owner to verify how theirs works.
    1 point
  6. Sounds like i need to be chatting with the boys on Mesa West about Boofwhang radios and the weather more often!
    1 point
  7. Yahhh.. But.. When you have a blow-torch like Mesa West that high on the mountain, it can still garble/cause interference for the other repeater if both are in use at the exact same time. We ran into the exact same trouble on .700 when our "Delta" repeater was up, and it wasnt in as good of a location.. But rumor has it that it might have had more power ...
    1 point
  8. Flameout

    Repeater permission

    You can't go by that. If you requested access, the repeater owner is notified via email immediately. I'm obviously logged in and this is what shows up for me
    1 point
  9. "illegal"? No.. Not complaint with FCCs regulations? Maybe.. But, the FCCs certified the radio sooooo.. Does the FCCs care? According to the FCCs' lack of enforcement, No Do any normal people care? No
    1 point
This leaderboard is set to New York/GMT-04:00
×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use and Guidelines.