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☀ Solar
SFI 121
SN 99
A 11
K 3 Unsettled
X-Ray C1.3
Wind 414.9 km/s
Aurora 3
Updated 12:30 UTC HamQSL · N0NBH
Day 80/40m Poor 30/20m Good 17/15m Fair 12/10m Fair
Night 80/40m Fair 30/20m Good 17/15m Fair 12/10m Poor

Callsign Lookup
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Vanity Call Signs Available
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ⓘ Callsign lookups are in real time via the FCC database. Vanity callsign availability is refreshed daily at 6:00 AM CST. The vanity search may be unavailable for a few minutes during this update.
Live DX spots
Live DX Spots — 70cm via PSKReporter · scroll or pinch to zoom
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VHF/UHF Antennas

Talk about VHF and UHF antennas, repeaters, mobile setups, and signal optimization.

  1. Collinear antenna SWR tuning issues - element length vs spacing

    Antenna Guy,
    • 2 replies
    • 444 views
    Robert Kowalski

  2. collinear vs yagi for local repeater coverage from a fixed location

    Jennifer Wilson,
    • 1 reply
    • 104 views
    Jennifer Wilson

  3. collinear vs yagi for simplex VHF -- what am i actually losing

    Thomas Wilson,
    • 1 reply
    • 137 views
    Lisa Anderson

  4. stuck on coax routing for mobile install

    Robert Taylor32,
    • 1 reply
    • 176 views
    Carlos Mendez

  5. Phasing coil tuning on 2M collinear - calculated vs actual dimensions

    Mike Rodriguez,
    • 2 replies
    • 737 views
    Mike Rodriguez

  6. NMO mount vs lip mount for dual band mobile — worth drilling the hole?

    James Wilson94,
    • 1 reply
    • 110 views
    Michael Barnes

  7. dual band yagi vs collinear for weak signal work from a hilltop site

    Bob Williams,
    • 1 reply
    • 134 views
    James Thomas

  8. dual band yagi vs collinear for hilltop portable — worth the hassle?

    Diana Williams,
    • 1 reply
    • 121 views
    Lisa Wang

  9. NMO vs SO-239 for mobile VHF/UHF — worth the hassle of drilling?

    Paul Wilson,
    • 1 reply
    • 140 views
    Jennifer Williams

  11. coax run length killing my signal on 2m? or is it the antenna

    Ashley Brown21,
    • 1 reply
    • 180 views
    Robert Taylor

  12. mag mount placement on a pickup truck roof vs cab — noticing a big difference

    Emily Rodriguez,
    • 1 reply
    • 156 views
    Amanda Anderson50

  13. dual band yagi getting weird swr on uhf side only

    QRP Master,
    • 1 reply
    • 200 views
    Ham Fan 24

  14. NMO mount on a steel roof vs magnetic — worth the permanent hole?

    Kenneth Lopez,
    • 1 reply
    • 123 views
    Rachel Williams

  15. Mobile VHF/UHF antenna placement - roof vs trunk mount VSWR comparison

    Lisa Chen,
    • 2 replies
    • 340 views
    Contest Fan

  16. Collinear antenna grounding and lightning protection - mobile vs base

    Sarah Wilson13,
    • 2 replies
    • 261 views
    James Wilson48

  17. collinear vs yagi for local repeater coverage from a hilltop site

    Carlos Silva,
    • 1 reply
    • 146 views
    Radio Geek

  18. mag mount vs permanent NMO on the truck — worth the hassle?

    Ashley Wilson95,
    • 1 reply
    • 173 views
    Nicole Jackson

  19. Diamond X510HDM SWR measurements - troubleshooting high SWR

    John Williams,
    • 2 replies
    • 303 views
    Amanda Foster

  20. Homebrew collinear vs commercial - real-world performance comparison

    Emily Wilson,
    • 2 replies
    • 257 views
    Ashley Johnson24

  21. dual band yagi vs collinear for hilltop portable ops — what are you guys using

    John Patterson,
    • 1 reply
    • 176 views
    Sarah Wilson

  22. colinear vs yagi for local repeater use — which is actually better

    CW Lover,
    • 1 reply
    • 196 views
    Kevin O'Connor

  23. SWR tuning issues on homebrew 5-element yagi - need advice

    Rick Anderson,
    • 2 replies
    • 314 views
    Ham Mountain

  24. collinear vs yagi for local 2m repeater work, worth the hassle?

    Patricia Kim,
    • 1 reply
    • 168 views
    Lisa Park

  25. mag mount placement on a pickup truck, getting weird SWR readings

    Ham Fan 24,
    • 1 reply
    • 147 views
    Paul Jackson

  26. yagi vs collinear for local repeater work — worth the hassle?

    Jessica Nakamura,
    • 1 reply
    • 215 views
    Jessica Nakamura

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