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Ham Radio Amateur Articles | Radioaficion Ham Radio

Ham Radio Amateur Articles

solar Cycle 24 will likely be the smallest in at least 100 years

NASA's Dr. David Hathaway predicts
that solar Cycle 24 will peak in mid 2013 at around 75.

NASA solar physicist David Hathaway told hams at the Huntsville Hamfest in August that solar Cycle 24 will likely be the smallest in at least 100 years, in terms of maximum sunspot numbers. But he says it is too early to know if this cycle is a precursor to what some scientists are predicting to be "the death of sunspots" or a "little ice age."

auroras boreales, en directo por Internet

Auroras boreales de Groenlandia, transmitidas en directo por Internet


Entre el 21 y el 29 de agosto, una conexión diaria desde el glaciar de Qaleraliq ofrecerá este maravilloso espectáculo celeste

Una expedición científica española (Shelios 2011) transmitirá por Internet desde el sur de Groenlandia, en concreto desde los alrededores del glaciar de Qaleraliq (longitud=46,6791W; latitud=60,9896N), el maravilloso espectáculo celeste de las auroras boreales, que en esta época del año adquieren especial belleza. La retransmisión vía Internet es posible merced a la colaboración de la Facultad de Informática de la Universidad Politécnica de Madrid.

Auroras boreales de Groenlandia, transmitidas en directo por Internet

Créditos

La FECYT (Fundación Española para la Ciencia Y la Tecnología, Ministerio de Ciencia e Innovación) y el IAC (Instituto de Astrofísica de Canarias) colaboran en la retransmisión bajo la actividad "Astronomía Ciudadana" dentro de la convocatoria de ayudas para el fomento de la cultura científica 2011 (FCT-11-1528). Las imágenes de la retransmisión serán puestas a disposición de los docentes para la realización de la práctica “Cálculo altura de formación de las Auroras Boreales a partir de imágenes” (ver astroaula.net).

Auroras boreales de Groenlandia, transmitidas en directo por Internet

RCI-5054DX Reviewed by AA1GW

Ranger Communications RCI-5054DX 6-Meter Transceiver

Reviewed by Joe Bottiglieri, AA1GW Assistant Technical Editor

Ranger Communications RCI-5054DX 6-Meter TransceiverThe Ranger RCI-5054DX all-mode transceiver has made gearing up for 6 meters considerably more affordable.

It's already clear that Cycle 23 will be going down in ham history as the best yet for 50-MHz fans. For years, we younger folks could only stand by and listen quietly as Old Timers reminisced about the incredible worldwide 6-meter openings they witnessed during the peaks of the legendary cycles of the hollow-state age. Now, however, a few of us—bona fide members of "generation solid-state"— have impressive 6-meter cycle-peak DX tales of our own to tell.

PERSEUS CONTROL SOFTWARE V4.0b

The new V4.0b software version allows connecting to remote Perseus receivers through any TCP/IP connection*.

All addressed issues are listed and commented in the database section of the Perseus support group
hosted on Yahoo.

NOTE (*) The minimum required upload bandwidth on the server side is 80 kbps. Three profiles were defined to simplify server setup (GPRS, ADSL, LAN).  Operation behind a router is possible after setting up the correct port forwarding rules.

For more information about the new client-server architecture and setup, please refer to the Client-Server Reference PDF file included in the 4.0b zipped file.

PERSEUS CONTROL SOFTWARE V4.0bDOWNLOAD AREA

ARISSat-1 Deployed After Delay

http://3.bp.blogspot.com/-nqT0NxH5IMA/TaRzYg_NmLI/AAAAAAAAAEE/2CwJV_0454U/s200/ARISSat-1logo.png

The ARISSat-1 amateur satellite was deployed by spacewalking cosmonauts today at approximately 1845 UTC, according to minute-by-minute postings by CQ VHF staff on the CQ VHF magazine Facebook page. The deployment was delayed for about three hours after the satellite was taken outside the International Space Station due to questions regarding one of its antennas. Ultimately the decision was made to toss it into space and put it in orbit! No word as of this posting as to whether the satellite is functioning independently. You may follow progress on the ARISSat-1 web page. Posted by CQ Newsroom

RadioJet 1102S Bonito shortwave receiver

Bonito shortwave receiver RadioJet 1102SNew Bonito shortwave receiver RadioJet 1102S

You won't believe your ears!
The new Bonito shortwave receiver RadioJet 1102S combines innovative design with the advantages of modern computer technology. It has a frequency range of 0,04 MHz to 30 MHz with an excellent sensitivity of .03 µVolts on a noise level of -137 dBm with an extreme resolution of 144 dB at a bandwidth of 24kHz. The Noise floor is extremely low, because there are no active parts between the Antenna and the ADC.

Strictly speaking, this radio is no SDR, although it is exclusively controlled by computer. So far no SDR has defined, controlled, read or computed anything like the RadioJet. Bonito RadioJet is a short wave receiver with a built-in USB Audio device and a 24kHz multi-channel IM jack or to put it simply:

SARK-110 Antenna Analyzer

The SARK-110 is a pocket size, stand alone antenna vector impedance analyzer that makes available a multitude of features and capabilities which are perfect for checking antennas, antenna feed lines and RF circuits for radio amateurs and hobbyist both in laboratory and in a field operation.

The analyzer features a Direct Digital Synthesis (DDS) generator with a range of 0.1 to 200 MHz and a frequency resolution of 1 Hz. The measurement part provides a precise measurement of the impedance vector including the true determination of the sign of the reactance. Besides it is provided the Open/Short/Load calibration standard for accurate results.


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