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Ham Radio . Magnum Experimentum

Antennas, experiments, engineering and other articles of interest to radio folks.

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440

Diamond Antenna NR770HBNMO with K515SNMO mobile antenna review

January 1, 2021September 30, 2020

After three years of mobile operation, I review the Diamond Antenna NR770HBNMO with appropriate K515SNMO mount including pattern measurements.

Categories Antennas, mobile Tags 2m, 440, 70cm, Diamond, K515, measurement, mobile, NR770HBNMO

When antenna tilt matters

June 4, 2018June 3, 2018
Front view of UHF antenna patterns at various side to side tiles of the radiator.

We test a popular VHF/UHF dual band antenna at various angles to reveal antenna tilt on a vehicle matters only in certain circumstances.

Categories Antennas Tags 2m, 440, 70cm, Diamond, Forester, K515, measurement, NR770HBNMO, Subaru

Diamond NR770HBNMO vs. Comet M-24M

February 18, 2020May 10, 2018

The Diamond Antenna NR770HBNMO paired with their K515S insulated luggage rack mount provides measurable and observable upgrade for my 2015 Subaru Forester 2m/440 mobile.

Categories Antennas Tags 2m, 440, 70cm, Comet, Diamond, EFHW, end-fed, Forester, K515, M-24M, measurement, mobile, NR770HBNMO, roof rack, Subaru, UHF, VHF

Low profile 2m/440 mobile installation

May 30, 2018March 27, 2017
Transceiver in sunglasses holder

Video showcases a nice, clean, professional installation of a 2m/440 transceiver into Hyundai sedan.

Categories mobile Tags 2m, 440, 70cm, 770, Diamond, Hyundai, sedan

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2m 6m 10m 15m 20m 40m 43 foot 70cm 80m AHVD APRS Baluns battery BigIR copper Diamond dipole DX-Eng. EFHW Elecraft end-fed EZNEC Field Day Golden Packet hexbeam J-Pole Kenwood kj4faj KX3 kx4o measurement mobile NEC NMO NVIS packet PL259 QRP sdr Simulation SteppIR UHF vertical dipole verticals VHF

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