A Quick Look at the Xiegu G90


At Dayton Hamvention 2019, the CSI Group announced a special deal on the Xiegu G90. The G90 is the first model of the new Xiegu G-series and is from a Chinese manufacturer. It is a man pack style portable 20W HF 10-160 meters transceiver with handles. The G90 uses 24-bit digital SDR architecture. It also includes an internal automatic antenna tuner.

Why another QRP radio in your collection?

I wanted a radio that had enough HF power (20 watts) to run off a reasonably sized Bioenno battery (the 4.5 or 9A) to make up for bad band conditions. 20W is about an S unit down from a typical 80-100 watt base station so no penalty for field operating (5W would be another S unit). I have found the military man packs all run around 20 watts on HF and my practical experience shows it to be a great trade-off. I…

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The Basics of NVIS


The Basics of NVIS

NVIS (pronounced  “niviss”) is Near Vertical Incidence Skywave HF-SSB propagation for communications between 1.8 and around 9 Megahertz and is essential to anyone requiring reliable HF communication from 1 to 400 mile radius.

For practical communications plans and operations, NVIS functions between 1.8 and around 9 Megahertz. Frequencies above that range the signals penetrate the ionospheric layer instead of the desired reflection back to earth. NVIS requires the signals to bounce back.

A NVIS antenna is always horizontal. A vertical antenna can never be used, including mobiles. Mobile antennas are actually angled to be horizontal if you wish to operate in NVIS.

A NVIS antenna has omnidirectional radiation.A NVIS antenna is low to the ground. It should be deployed less than twenty feet above the  ground.

A multi-frequency NVIS antenna requires an antenna tuner at the feedpoint of the antenna system.

If you use a dipole antenna with an automatic antenna tuner to operate…

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50.06-50.09 Beacons
50.0-50.1 CW
50.090 CW Calling Freq
50.06 QRP CW Calling Freq
50.7 RTTY Calling Frequency
50.100 to 50.130 DX Window (USB)
50.110 DX Calling Frequency (USB) Usually Non-USA Stations Call Here.
50.115 DXpeditions Frequently operate CW and SSB here
50.125 USA National SSB Simplex Frequency (USB)
50.1-50.6 Weak Signal, AM
50.260 is the WSJT Meteor Scatter calling frequency in the USA
50.270 FSK Meteorscatter
50.300 FM Simplex Calling Frequency (West Coast)
50.385 USB PSK31
50.4 National AM Simplex Frequency
50.885 QRP SSB Calling Freq
51.910 FM Internet Linking
52.525 National FM Simplex Calling Frequency

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The HF Oracle Predicts Better DX coming but Be Patient


Bonnie Crystal KQ6XA has done a lot of study on propagation and good news is coming if your patient

Last year, on 3 September 2018, The HF Oracle predicted the solar minimum in 2019

We have arrived.

Her prognostication has come true

Today we are wallowing in the propagation mud, deep in the valley between 2 solar cycles. 

We will soon start to climb out and into Solar Cycle 25 at the end of 2019.

This bad news is also good news 🙂

There may start to be a few randomly good propagation days every so often, especially later this year.

According to The High Frequency Oracle’s prognostication, we will see improved HF propagation in 2020.

Propagation is predicted to get even better in the next 3 years.  solar 2019 2solar 2019

-Bonnie Crystal KQ6XA, 

Scribe and Chronicler of The High Frequency Oracle 


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