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Ham Radio Amateur Articles | Radioaficion Ham Radio

Ham Radio Amateur Articles

Bird Wattmeter Calibration and Repair

Calibration and Repair for Bird Wattmeter Elements

Follow these simple, easy steps—and save big money!

by Francis Kelson HL9BK/K2KSY

Some time ago, I received some burned out and well-used Bird and Sierra wattmeter elements. As I looked over the elements, 1 wondered if ii was possible to gain access to the passive and active elements inside for replacement or restoration. At 55 bucks per, I figured it was worth my time and effort to check it out, since 1 had well over a thousand dollars worth laying on the bench in front of me. My investigations paid off handsomely.

Dutch communications tower collapses after blaze

A fire caused a partial collapse of a 300-metre communications mast in northern Netherlands Friday, knocking out television and radio stations, a local municipal official said.

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The fire at the 300-metre-high (984 feet) television mast in Hoogersmilde in the Drenthe province, about 160 kilometres (100 miles) northeast of Amsterdam, broke out around 2:00 pm (1200 GMT), said Midden-Drenthe municipality spokeswoman Miriam Fokkema.

"There was a fire shortly before 2:00 pm and then at about 3:45 pm the upper part of the mast collapsed," Fokkema told AFP.

Dutch news agency ANP said a 200-metre-high metal mast collapsed on top of a 100-metre concrete tower after the fire broke out.

"Nobody is believed to have been injured," said Fokkema, adding that the area suffered severe communication problems with the tower used as a major broadcast hub for television, radio and telephone communications.


Se derrumba una torre de comunicación en Holanda

RemoteRig Demonstration in Spanish

Remoterig Remote Control your station over the internet

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MFJ-92XX, MFJ-9200MFJ-9200 QRP CW XCVR, 20M, W/20M MODULE, 5W

MFJ-9200 is a bold new addition to MFJ's legendary QRP transceiver line, delivering unmatched six-band CW performance in a compact pocket-sized package. QRP radios have always been small in size, but thanks to direct-digital synthesis and microprocessor technology, the MFJ-9200 represents a quantum leap over traditional designs with an unprecedented number of features for a very affordable price.

The MFJ-9200 covers 80 through 15 Meters using computer-modeled plug-in filter modules that yield no-compromise receiver performance and solid QRP+ transmit power on every band. There's also built-in iambic keying with a manual-key sensor, a programmable CQ message, and seamless QSK T/R switching. DDS frequency control delivers rock-solid stability, precise 100-Hz readout, and eight memory channels per band. Plus, you get a choice of three main-dial tuning rates and RIT with 10-Hz tuning resolution.

More Info.....

ARISSat-1 Test Set for July 30-31

ARISSat-1During the International ARISS teleconference July 14, Sergey Samburov, RV3DR, announced that the ARISSat battery will be charged late in July.

A test of the system will be conducted on the International Space Station from 1915 UTC on July 30 to about1200-1400 UTC on July 31.

The standard ARISSat-1/KEDR 2-meter downlink band plan should be transmitted as well as the FM signal - also downlinked on 437.55 MHz.  More information as it becomes available.
"Today we are looking at an August 3 date for EVA 29 and the ARISSat-1/KEDR deployment. This is all subject to change," the release noted. "ANS thanks Gould Smith, WA4SXM, for this latest information." - AMSAT News Service

ACOM Director 0.4.3 Now Available

ACOM Director 0.4.3 (Beta) is now available for download

ACOM Director is a free software package designed to allow the computer control of the ACOM 2000A HF Amplifier.

ACOM Director 0.4.3

ACOM Director is provided free of charge and you may use the software on as many machines as you like, however I would ask that you not host your own copies for download, but rather link back to this page in order to ensure that anyone looking for the software will always have the latest version available to them.

You will require a Windows XP/Vista/7 either 32-bit or 64-bit with the Microsoft.NET 3.5 SP1 Framework installed

This version is a bug fix only release which fixes a number of fairly critical issues that were stopping some users from using the application

Download the latest version here

Nuevo Tecsun R-2010 con chip Si4831

New Tecsun R-2010 Portable Radio Based on Silicon Labs’ Si483x AM/FM Receiver chip Si4831 de Silicon Labs y el Tecsun R-2010

Muchos de nosotros estamos esperando la llegada de la nueva radio DSP Tecsun R-2010. Esta radio utilizará el chip Silicon Labs Si4831/35-B30 , desarrollado para la recepción de AM / FM SW. Esta segunda generación de CMOS con mecánica afinada integra la función de receptor completo desde la entrada de antena hasta la salida de audio en un solo chip, como el chip digital Si4734 que lleva el Tecsun PL-380 ............


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