Archivo de la etiqueta: usa

¿Por qué no usar LoTW?

La entrada de hoy viene por una pregunta que hace Victor 4X6GP, ¿Porque no mas operaciones DX no usan LOTW?

Victor escribe: Estoy leyendo mi boletín DX favorito y viene con una nota de un operador va a estar en una operación en un lugar semi-raro en cierta fecha. Sigue leyendo ¿Por qué no usar LoTW?

RF Pro 1B Initial Review – K2RWF

May 7, 2016 at 11:07AM

Rob Fissel, K2RWF shares his testing of the DX Engineering RF-PRO-1B Active Magnetic Receive Loop Antenna.

Pixel Technologies Active Magnetic Loop Antennas are designed for reception of signals over the range of 100-kHz to 30-MHz. They include a very high dynamic-range low-noise preamplifier that can be mounted to a pole, mast, or any flat surface. The preamplifier is designed for minimum intermodulation distortion in the presence of very high-level signals that would normally overload most preamplifiers.

Most active antennas are whip types and respond mainly to the electrostatic-field portion of an electromagnetic radio wave. The magnetic loop responds primarily to the magnetic field and thus ensures a high rejection of nearby electric fields. The intensity of the electric field is usually higher than the magnetic field when an antenna is close to interference sources such as TVs, fluorescent lamps, power line wiring, etc. By rejecting the electric field, there is a reduction in local interference compared to other types of active and passive antennas.

Interference reduction is further enhanced by the deep nulls of the antenna’s directivity pattern that can be used to null out or reduce interference coming from a specific localized direction.

Details of RF PRO-1B loop antennas:

* DO NOT connect them to a transmitter, as their preamplifier will be damaged
* Very low IMD, 30 dB low-noise preamp ensures good performance in both strong and weak signal environments
* Up to 30 dB rejection of locally radiated noise compared to whip antennas
* Figure eight directivity provides deep nulls to further reduce interference
* Primary coverage range: 50 kHz to 30 MHz
* Rejects power line noise
* Rugged construction, easily mounts to a pole or flat vertical surface
* No manual tuning necessary
* No Home Owners Association problems; low profile and works at ground level
* Modular design for easy installation and maintenance
* Internal transmit/receive switch disconnects antenna/preamp from your receiver when transmitting
* Made in the USA

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QRP Transceiver LNR Precision Kickstarter Project

April 29, 2016 at 07:09PM
QRP Transceiver Manufacturing & Assembly LNR Precision is a well known manufacturer of quality QRP Transceivers and Endfed Antennas for Amateur Radio enthusiasts. We are entering our 6th year of business and are products are continually 5 star rated in eham reviews. We take our craft seriously and believe in MADE in the USA products.  […]

Decir «chino» no es nada peyorativo

March 22, 2016 at 08:23AM

Radio-Noticias en
Todavía hay muchos usuarios que no se dan cuentade que todos o casi todos sus equipos, de los que presumen, tienen esa procedencia
La etiqueta de «chino» (y sus derivados), cuestiones xenófobas al margen, es cada vez más ridícula y demostrativa de que el que la esgrime poco o nada conoce de lo que usa, de lo que compra y de lo que le rodea. Desde siempre, la gran mayoría de productos de radioafición se han fabricado en países orientales. Ha habido excepciones encabezadas por la industria japonesa, la italiana, a la que le dedicamos una serie de reportajes hace algunos años, la estadounidense y la británica. via IFTTT

Ventajas de la radio DMR

Más allá de la calidad de audio, la radio digital aporta otras muchas ventajas
Este formato de transmisión es más flexible, ya que usa la primera ranura para la voz y la segunda puede emplearse para la transmisión de datos, mensajes de texto o coordenadas de la ubicación del operador..

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CLE 204 Results

With a very quiet sun for the entire week, this past weekend’s CLE proved to have much better conditions than normally experienced.

Conditions were ‘good’ but not ‘great’. Really ‘great’ nights are few and far between but with the rapidly declining solar cycle, we should see more and more of these over the next few winters.

Most listeners around the world reported good conditions, with the nod going to Friday night as being the best. I thought that all three nights were good, but heard nothing new on night number three.

A surprise catch, with a good signal, was ‘BRA -379’ in Asheville, North Carolina. It’s classified as an ‘H-class’ NDB and is an outer marker locator. I believe the H-class indicates a 400W transmitter and with the large vertical antenna, seems to get out very well.


Even more surprising was ‘SPH-375’ located in Springhill, Louisiana. It is an LOM ndb, being co-located with the runway’s ILS outer marker. The beacon appears to be using the classic "T’ as seen here and is likely in the 25 watt range.


As I mentioned earlier, I was rather dreading this CLE since my local blowtorch pest signal (AP-378) was smack in the middle of the CLE’s frequency range. ‘AP’ is located 6/10ths of a mile from me, just down the shoreline and has a huge signal here.

Fortunately, Perseus has an extremely effective ‘notch’ filter, and this, along with putting ‘AP’ in my LF loop’s null, allowed me to hear two other NDB’s beneath it … ‘ZFA’ (Faro, Yukon) and ‘UX’ (Hall Beach, Nunavut).

The following 44 stations were heard on the Perseus SDR while using either the LF loop or my inverted ‘L’, tuned to 370 kHz.

27 06:00 370.0 YBV Berens River, MB, CAN
27 06:00 370.0 PAI Whiteman, CA, USA
27 06:00 371.0 YK Yakima, WA, USA
27 11:00 371.0 UK Laughlin, CA, USA
27 06:00 371.0 PUR Marshall, MO, USA
27 06:00 371.0 ITU Great Falls, MT, USA
27 05:00 371.0 GW Kuujjuarapik, QC, CAN
27 06:00 372.0 ZPA Prince Albert, SK, CAN
27 08:00 372.0 YCO Kugluktuk, NU, CAN
27 05:00 373.0 MF Table Rock, OR, USA
27 06:00 374.0 LV Livermore, CA, USA
28 09:00 374.0 HY Hays, KS, USA
27 05:00 374.0 EX Kelowna, BC, CAN
27 08:00 374.0 EE Forada, MN, USA
28 09:30 375.0 SPH Springhill, LA, USA
27 05:00 375.0 FS Fort Simpson, NT, CAN
27 07:00 375.0 CP Casper, WY, USA
27 08:00 375.0 BM Balmoral, MB, CAN
27 08:00 375.0 BD Moose Jaw, SK, CAN
27 08:30 376.0 ZIN Matthew Town, BAH
27 07:00 376.0 YAG Fort Frances, ON, CAN
27 05:00 376.0 PVQ Deadhorse, ALS
27 07:00 376.0 LC Columbus, OH, USA
27 09:00 377.0 EHA Elkhart, KS, USA
27 08:00 377.0 BUB Burwell, NE, USA
27 08:00 378.0 ZFA Faro, YT, CAN
27 05:00 378.0 UX Hall Beach, NU, CAN
27 07:00 378.0 OT North Bend, OR, USA
27 05:00 378.0 AP Mayne Island, BC, CAN
27 08:00 379.0 ZEG Edmonton, AB, CAN
28 11:00 379.0 IWW Kenai, ALS
27 07:00 379.0 DL Duluth, MN, USA
27 08:00 379.0 BRA Asheville, NC, USA
27 10:00 380.0 OEL Oakley, KS, USA
27 08:00 380.0 GC Gillette, WY, USA
27 05:00 380.0 BBD Brady, TX, USA
27 08:00 381.5 SJX St James, MI, USA
27 10:00 382.0 YPW Powell River, BC, CAN
27 10:00 382.0 YE Fort Nelson, BC, CAN
27 06:00 382.0 SP Springfield, IL, USA
27 08:00 382.0 JNR Unalakleet, ALS
27 08:00 382.0 AW Marysville, WA, USA
27 10:00 383.0 PI Pocatello, ID, USA
27 07:00 383.0 CNP Chappell, NE, USA
27 10:00 384.0 3F Ile-a-la-crosse, SK, CAN

The listening results for all North American listeners and those outside of Europe can be found here.

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Sputnik’s Transmitter Beeps Again

Sputnik. The first artificial satellite, the launch of which precipitated the space race. Without the frenetic pace of technological advancement as the USA and the USSR vied with each other during the decade following its launch it is safe to say that we might not yet have many of the tools and components we take for granted as electronics enthusiasts and makers today.

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An Australian balloon again crosses the equator

The antics of pico solar powered high altitude balloon PS-58 had many USA and Canadian radio amateurs somewhat surprised as the Aussie floated, and lingered in the Northern Hemisphere

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QSO Today EP 40 Joe Moells K0OV:

QSO Today EP 40 Joe Moells K0OV:
Joe Moell, K0OV, discovered his love for amateur radio transmitter hunting as an 11 year old Novice in the 1950s. This passion for the hunt has led Joe to become the leading expert in transmitter hunting of all kinds including popularizing the European "fox hunt", or on foot direction finding contests in the USA. He is an author of over 200 articles on "T hunting", and is Eric’s guest on QSO Today.