Tuesday, February 19, 2013
NWS Radio Site is Off Air Due to Copper Theft
Guererro said that county authorities reported that vandals broke into the transmitter building north of Coleman and stole the copper data feed lines that come from the city of San Angelo. The weather alert transmitter, which identifies as WXN-89, operates at 162.475 MHz. News reports say that many area Weather Alert radios and scanners are tuned to that frequency.
The lines are being replaced and the transmitter should be back on the air by the time you hear this report. Federal officials as well as Coleman county authorities are investigating the break-in and vandalism that damaged the federal government transmitting facility. (Nuizer.com, Brownwooid News)
KWWK KNOCKED OFF THE AIR BY COPPER THIEF
Rochester Minnesota police are investigating a recent copper theft that took a local radio station off the air. Early Monday, February 4th, someone broke into the KWWK radio transmitter and tower site. The thief made off with both copper transmission line and a motor. An engineer found the crime when he went into work around 4 a.m.. Damage to the property is estimated at $550. (KTTC, others)
HOW TO READ PROPAGATION NUMBERS
The A index [ LOW is GOOD ]
- 1 to 6 is BEST
- 7 to 9 is OK
- 11 or more is BAD
Represents the overall geomagnetic condition of the ionosphere ("Ap" if averaged from the Kp-Index) (an average of the eight 3-hour K-Indices) ('A' referring to amplitude) over a given 24 hour period, ranging (linearly) typically from 1-100 but theoretically up to 400.
A lower A-Index generally suggests better propagation on the 10, 12, 15, 17, & 20 Meter Bands; a low & steady Ap-Index generally suggest good propagation on the 30, 40, 60, 80, & 160 Meter Bands.
SFI index [ HIGH is GOOD ]
- 70 NOT GOOD
- 80 GOOD
- 90 BETTER
- 100+ BEST
The measure of total radio emissions from the sun at 10.7cm (2800 MHz), on a scale of 60 (no sunspots) to 300, generally corresponding to the sunspot level, but being too low in energy to cause ionization, not related to the ionization level of the Ionosphere.
Higher Solar Flux generally suggests better propagation on the 10, 12, 15, 17, & 20 Meter Bands; Solar Flux rarely affects the 30, 40, 60, 80, & 160 Meter Bands.
K index [ LOW is GOOD ]
- 0 or 1 is BEST
- 2 is OK
- 3 or more is BAD
- 5 is VERY VERY BAD
The overall geomagnetic condition of the ionosphere ("Kp" if averaged over the planet) over the past 3 hours, measured by 13 magnetometers between 46 & 63 degrees of latitude, and ranging quasi-logarithmically from 0-9. Designed to detect solar particle radiation by its magnetic effect. A higher K-index generally means worse HF conditions.
A lower K-Index generally suggests better propagation on the 10, 12, 15, 17, & 20 Meter Bands; a low & steady Kp-Index generally suggest good propagation on the 30, 40, 60, 80, & 160 Meter Bands.
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