The Doctor Will See You Now!

“Power Supplies” is the topic of the current (July 20) episode of the “ARRL The Doctor is In” podcast. Listen…and learn!

Sponsored by DX Engineering, “ARRL The Doctor is In” is an informative discussion of all things technical. Listen on your computer, tablet, or smartphone — whenever and wherever you like!

Every 2 weeks, […]

The K7RA Solar Update

All the indicators we track at the bottom of this bulletin fell last week.

Because there were no sunspots in six of the seven days (July 20-26) last week, average daily sunspot number dropped from 26.6 to 1.7. Average daily solar flux declined from 85.9 to 69.7.

Average daily planetary A index declined […]

The K7RA Solar Update

Average daily sunspot numbers rose this reporting week (June 15-21) from 4.9 to 29.4. The previous week had four days with no sunspots, and this week there were no zero sunspot days, hence the dramatic increase in the average.

Average daily solar flux barely budged from 74.4 to 74.6

Average daily planetary A index […]

The Doctor Will See You Now!

“Generators” is the topic of the new (June 22) episode of the “ARRL The Doctor is In” podcast. Listen…and learn!

Sponsored by DX Engineering, “ARRL The Doctor is In” is an informative discussion of all things technical. Listen on your computer, tablet, or smartphone — whenever and wherever you like!

Every 2 weeks, your […]

FCC and OSHA Release Communications Tower Best Practices Guide

The FCC and OSHA have announced the release of a free publication, Communications Tower Best Practices Guide. While aimed more at those who tend commercial communication towers, the guide offers guidance applicable to the Amateur Radio community and contractors working on Amateur Radio antenna support structures. The FCC said the guide was a result […]

2017 ARRL/TAPR Digital Communications Conference Issues Second Call for Papers

Technical papers are solicited for presentation at the 36th annual ARRL/TAPR Digital Communications Conference (DCC), set for September 15-17 in St. Louis, Missouri at the Holiday Inn Airport West in Earth City. Papers will also be published in the Conference Proceedings. Authors do not need to attend the conference to have their papers included […]

Updated ARRL “US Amateur Radio Bands” Charts Now Available

ARRL has revised and updated its “US Amateur Radio Bands” charts, and these now are available for download. These are PDF documents, available in color or grayscale presentations.

The revised charts reflect the new 630- and 2,200-meter bands, but also emphasize that these bands are not yet available for Amateur Radio use. The effective […]

he K7RA Solar Update

The Australian Space Weather Forecast Centre issued a geomagnetic warning at 0301 UTC on May 19:

”Geomagnetic conditions may rise to minor storm levels late on 19 May. Geomagnetic activity is expected to remain enhanced to active to minor storm levels with some major storm periods on 20 May. Mostly unsettled to active levels […]

Deadline for the QST Antenna Design Competition is June 1

The deadline to submit entries for the 2017 QST Antenna Design Competition is Thursday, June 1. Enter in one of three categories — 160 meters, LF, or VLF; 80 through 10 meters, and 6 meters and higher bands. Only one entry per person or team will be accepted.

First-place winners (individuals or teams) in […]

ISS Packet System is Back on VHF

The Amateur Radio on the International Space Station (ARISS) packet digipeater system is again operating on VHF — 145.825 MHz. The failure of an Ericsson handheld VHF transceiver on board the ISS last fall had caused ARISS to shift packet operation to 70 centimeters. A cargo resupply mission in February delivered a new Ericsson 2 […]