Comparing RTTY, PSK and MFSK

Nightime view of the Elecraft KX3 and PX3 for ARRL Field Day 2015.

Using the ARRL field day test message to compare RTTY, PSK and MFSK digital modes.

KX4O 1B-Battery VA Field Day 2015

The 20m AHVD and 40m small loop antennas during KX4O 1B VA field day.

Despite a weak battery and few contacts, our 1B-Battery effort verifies a 40m small-loop and packet-radio NTS messaging using quick deploy antennas.

New Choke Configuration for AHVD

Asymmetrical Hatted Vertical Dipole at ARRL Field Day 2014 with new RF Choke configuration.

Shown is a better configuration to fasten a choke to the Asymmetrical Hatted Vertical Dipole antenna.

SOTA HNY Activation

View of gear

KX4O/p Summits on the Air (SOTA) activation of Hawksbill Mountain (W4V/SH-001) on New Year’s Eve on 40, 20 and 10 meters.

Hatteras Ham Shack

Hatteras Ham Shack

I took the asymmetrical hatted vertical dipole to Hatteras beach to activate NA-067. I wasn’t very successful, but made a couple QSOs. Despite mixed results, the setting was spectacular. The vertical dipole worked.

Vertical Dipole at Lighthouse

Vertical Dipole at Lighthouse

The asymmetrical hatted vertical dipole (AHVD) provides a quick setup HF antenna at Hatteras lighthouse.

Build this Vertical Portable HF Antenna

Build this Vertical Portable HF Antenna

The Asymmetrical Hatted Vertical Dipole (AHVD) prototype is an easy to build, portable alternative to other freestanding vertical HF antennas such as the Buddipole.

Asy Hat Vertical Dipole

Three views showing a how a planed vertical need not always be the classic 1/4 wave monopole.

We re-introduce the theory and origins of Cebik’s (W4RNL) Asymmetrical Hatted Vertical Dipole (AHVD) antenna with the hope to facilitate a vertical polarization portable 20-10m aerial for portable operations.

EFHW LNR Precision EF-10/20/40MKII Test Data

SWR Measurements of LNR Precision EF-10/20/40 End Fed Antenna

Basic tests of the LNR Precision EF-10/20/40 multi-band portable HF EFHW antenna including S11, SWR and a bandwidth check of the match box.

EFHW LNR Precision EF-10/20/40MKII Examination

EFHW LNR Precision EF-10/20/40MKII Examination

The background and details of the LNR (Par Electronics) EF-10/20/40 end fed half-wave multi-band portable HF antenna. Come see what’s inside the mysterious “black box.”