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ARRL Urges Members to Join in Strongly Opposing FCC’s Application Fees Proposal

ARRL - Fri, 11/27/2020 - 19:21

10/27/2020

ARRL will file comments in firm opposition to an FCC proposal to impose a $50 fee on amateur radio license and application fees. With the November 16 comment deadline fast approaching, ARRL urges members to add their voices to ARRL’s by filing opposition comments of their own. The FCC Notice of Proposed Rulemaking (NPRM) MD Docket 20-270 appeared in the October 15 edition of The Feder...

Congressional Resolution--Help Needed

QRZ - Tue, 11/24/2020 - 20:53

Universal Radio Closing: Retirement

QRZ - Tue, 11/24/2020 - 18:28

Arecibo Observatory to be Demolished

QRZ - Tue, 11/24/2020 - 16:13

Best Black Friday Deals for 2020 for HAM RADIO

QRZ Now - Tue, 11/24/2020 - 07:25

Best Black Friday Deals for 2020 for HAM RADIO

(adsbygoogle = window.adsbygoogle || []).push({}); Antenna The Cycle Buster – New HF Dual Antenna M2 ! May 04, 2016 No comments

The 40-20M-3-5 is a coil loaded 40 meter 3 element Yagi interlaced with a 20M 5 element Yagi. This antenna is the perfect package to bust the sun spot... Read more

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XR6 | COMPACT 11 ELEMENT 20 /17 / 15 / 12 / 10 / 6 METER MULTI-MONO YAGI June 02, 2015 No comments

For years InnovAntennas co-owner Bill AA7XT pestered his InnovAntennas business partner Justin G0KSC to design an antenna that would cover 20 through... Read more

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HF SDR Transceiver Read more

IC-7610 – Interview with ICOM December 23, 2018 No comments

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Icom IC-7300 vs Yaesu FT-991 80m SSB Comparison March 14, 2016 No comments

Hear a comparison of the Icom IC-7300 vs Yaesu FT-991 on 80m SSB.   Read more

Airspy HF+ Discovery – Overview & Brief Testing August 11, 2019 No comments

Read more

Icom ID-51E PLUS2 Unboxing April 26, 2017 No comments

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Expert Amps 2K FA Manual   See More: Link Photos: Read more

“New Elecraft K4s in production September 02, 2020 No comments

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Yaesu FT-991 – Manual (PDF) December 04, 2014 No comments

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Antennas and bands programmable controller LBC8ARD – MomoBeam December 08, 2016 No comments

LBC8ARD 8 DIRECTION CONTROLLER programmable for any remote relay switches and controlers; Easily programmable to control equipment of: LowBandSystems... Read more

AR-ALPHA 10kHz-3500MHz, Digitally processed Professional Grade, Base Type October 31, 2015 No comments

AR-ALPHA 10kHz-3500MHz, Digitally processed Professional Grade, Base Type Read more

News Best Black Friday Deals for 2020 for HAM RADIO November 24, 2020 No comments

Best Black Friday Deals for 2020 for HAM RADIO Read more

Dayton Hamvention Announces its 2021 Theme — “The Gathering” November 24, 2020 No comments

“The Gathering” will be the theme for the 2021 Dayton Hamvention®. Hamvention General Chair Rick Allnutt, WS8G, said the theme reflects what has been... Read more

Still Time to Apply for Foreign Service Information Management Technical Specialists-Radio Positions November 24, 2020 No comments

The deadline to apply for US Department of State Foreign Service Information Management Technical Specialists-Radio (IMTS-R) positions is December 1,... Read more

Moscow Aviation Institute plans SSTV event from ISS November 22, 2020 No comments

Rodolfo Parisio, IW2BSF, reports that a Slow-Scan Television (SSTV) transmission event from the International Space Station is currently scheduled to... Read more

Universal Radio is closing shop November 22, 2020 No comments

Dear Friends Of Universal Radio, Time waits for no one, and that includes Barbara and myself. We have decided to retire and our current location in Wo... Read more

The post Best Black Friday Deals for 2020 for HAM RADIO appeared first on QRZ NOW - Ham Radio News.

Airspy HF+ Discovery is the Most Refined HF/VHF SDR

QRZ Now - Tue, 11/24/2020 - 07:18

The Airspy HF+ Discovery sets a new standard in terms of reception performance with extra pre-selectors for all the supported bands and a New DSP Core to optimize the gain distribution and the filtering parameters in real-time and dig deeper in the noise.

Overview

The signal path includes very high dynamic range data converters along with high performance passive mixers with an excellent Polyphase Harmonic Rejection structure. The included band-tracking pre-selectors eliminate unwanted interference and preserve the dynamic range of the receiver. With its world class strong signal handling capability and incredibly Low Noise, the HF+ Discovery is the ideal companion for All your High Performance Receive Scenarios.

Both the architecture and level of integration achieved in this design allow us to bring top performance reception at a very affordable price. All the major SDR software is supported. Check the download page.

Ready to discover all these signals hiding in your spectrum? 

Improved Architecture

Unrivalled Noise Reduction Processing
We spent a lot of time understanding RF noise, its structure, and how it interacts with legitimate signals. Today, we have one of the most flexible and acoustically pleasant noise reduction algorithms of the market. The applications range from high-fidelity hiss removal for Broadcast FM signals, to unburying weak SSB signals from the noise floor. Our algorithm doesn’t kill the highs to give you a false impression of loudness, yet it doesn’t have the typical high tone artifacts that plague popular noise reduction algorithms like LMS and Spectral Subtraction.

Here’s a very weak SSB signal in the 40m band, with and without our Digital Noise Reduction. Check by yourself!

We concentrated state of the art DSP and networking techniques into our SpyServer software to allow multiple users to stream high quality IQ data from the same receiver at the same time. No compromises in the quality were made like it is usually done in Web SDR interfaces. You get actual IQ data you can process with your plugins and extract the last bit of information out of it.

The server software is highly scalable and can run on computers as small as the $7 Orange Pi Zero to top end 64bit servers with multiple cores/cpus, including the popular Raspberry Pi series.

HF Tuner

Airspy HF+ Discovery achieves excellent HF performance by means of a low-loss preselection filter, high linearity LNA, high linearity tunable RF filter, a polyphase harmonic rejection (HR) mixer that rejects up to the 21st harmonic and multi-stage analog and digital IF filtering.

The 6 dB-stepped AGC gain is fully controlled by the software running in the DSP which optimizes the gain distribution in real time for optimal sensitivity and linearity. Harmonic rejection is a key issue in wide band HF receivers because of the large input signal bandwidth of the input signal. The output of the IF-filter is then digitalized by a high dynamic range sigma delta IF ADC for further signal processing in the digital domain.

VHF Tuners

Excellent FM performance is also achieved by using optimized signal paths composed of band filters, high linearity LNAs with a stepped AGC, a polyphase harmonic rejection mixer and IF filters optimized for the FM broadcast bands.

The amplifier gain is switchable in 3 dB-steps and fully controlled by the AGC running in the DSP. The RF signal is converted to baseband by a high linearity passive mixer with a polyphase harmonic rejection structure. The low-IF signal is then converted into the digital domain by the same IF ADC used in the HF chain. Extended VHF coverage is assured by a second Band-III tuner up to 260 MHz, but with reduced performance.

IF Sampling

The IF analog to digital converter (ADC) is a 4th order multi-bit noise shaping topology; it features very high dynamic range and linearity. The IF-ADC sampling rate is determined by a control algorithm running in the embedded DSP. This advanced technique adjusts the sampling rate depending on the tuning frequency with the goal of avoiding the disturbances and spurs generated by the switching discrete-time sections of the IF-ADC.

Digital Down Converter

Once the IF signal is digitalized, the high sample rate I/Q stream is then frequency translated and processed with cascaded CIC and FIR decimation stages. After every stage, the sample rate is reduced and the resolution increased. The final signal at the output has 18bit resolution and an alias rejection performance of 108 dBc. The data is then scaled to 16bit and sent to the Micro-Controller for streaming over USB.

Architectural Advantages

The main advantages over techniques from the legacy super-heterodynes up to the now mainstream direct sampling is that the whole receiver chain is well protected against out of band blockers while still relaxing the RF filtering constraints, making it simple and cost effective. The natural filtering of the sigma-delta ADC combined with the excellent linearity and sensitivity of the analog chain reaches an unprecedented level of performance and integration.

Use it over the network!

Connect as many SDR applications as needed to the HF+ Discovery, over the Internet or in your own local network with near zero latency thanks to the new SPY Server software.

This setup basically brings all the flexibility of Web based SDRs while still benefiting from the full power of desktop applications. The IQ data is processed in the server with state of the art DSP and only the required chunk of spectrum is sent over the network. What is sent is the actual IQ signal, not compressed audio. This means you can use all your favorite plugins to process the IF, eliminate noise and perform heavy lifting of the signals as you are used to do with locally connected SDR’s.

We have a tradition of building multi-tools, so we made sure the SPY Server runs on 32/64bit Windows and Linux on Intel and ARM processors without any compromises. Low cost Raspberry Pi 3 and Odroid boards are in the party.

Technical specifications

  • HF coverage between 0.5 kHz .. 31 MHz 
  • VHF coverage between 60 .. 260 MHz
  • -140.0 dBm (0.02 µV / 50 ohms at 15MHz) MDS Typ. at 500Hz bandwidth in HF
  • -141.5 dBm MDS Typ. at 500 Hz bandwidth in FM Broadcast Band (64 – 118 MHz)
  • -141.0 dBm MDS Typ. at 500 Hz bandwidth in VHF Aviation Band (118 – 260 MHz)
  • +15 dBm IIP3 on HF at maximum gain
  • +13 dBm IIP3 on VHF at maximum gain
  • 110 dB blocking dynamic range (BDR) in HF
  • 95 dB blocking dynamic range (BDR) in VHF
  • 150+ dB combined selectivity (hardware + software)
  • 120 dB Image Rejection (software)
  • Polyphase Tracking filters for close range interference suppression
  • New High Performance Pre-selector for HF with 4 filter banks (corners at ~DC, 5, 10, 17 and 31 MHz)
  • New High Performance Pre-selector for VHF (Air, HAM, Commercial and Military VHF)
  • New High Performance Pre-selector for the FM band (Japan, US, EU, OIRT)
  • Up to 660 kHz alias and image free output for 768 ksps IQ
  • 18 bit Embedded Digital Down Converter (DDC)
  • 22 bit Resolution at 3 kHz channel using State of the Art DDC (SDR# and SDR-Console)
  • +10 dBm Maximum RF input
  • 0.5 ppm high precision, low phase noise clock
  • 1 PPB frequency adjustment capability
  • Very low phase noise PLL (-110 dBc/Hz @ 1kHz separation @ 100 MHz)
  • Best Noise reduction of the market using state of the art algorithms
  • 2 x High Dynamic Range Sigma Delta ADCs @ up to 36 MSPS
  • Single RF Input to cover all bands with High Linearity switching
  • Improved input matching down to virtually DC
  • Smart AGC with real time optimization of the gain distribution for Best SNR in all situations
  • No drivers required! 100% Plug-and-play on Windows Vista, Seven, 8, 8.1 and 10
  • Industrial Operating Temperature: -45°C to 85°C

Typical Applications

  • High Performance Networked HF/VHF Radio
  • Ham Radio (HF + 2m)
  • Short Wave Listening (SWL)
  • AM DX
  • FM DX
  • VHF-L TV DX
  • Remote Telemetry Radio Receiver
  • Low Bands IoT

Supported Software

Supported Operating Systems

  • Windows Vista, 7, 8, 8.1 and 10
  • Linux
  • *BSD
  • OSX

Supported Hardware

  • Intel compatible PC
  • Raspberry Pi 2 and 3
  • Odroid C1, C2 and XU4
  • Many other Single Board Computers (SBC)

Minimum hardware requirements

  • 1GHz Pentium or ARM
  • 1GB of RAM (to run your own OS, HF+ barely needs 1MB of memory)
  • High speed USB 2.0 controller

Fully Open-Source driver

  • Open source, multi-platform user mode driver libairspyhf on github

Firmware Updates

$118.30

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Icom IC 705 10 Features in 10 Minutes October 04, 2020 No comments

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Equipment ICOM IC-7610 – Pre-release Brochure May 19, 2017 No comments

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The post Airspy HF+ Discovery is the Most Refined HF/VHF SDR appeared first on QRZ NOW - Ham Radio News.

Dayton Hamvention Announces its 2021 Theme — “The Gathering”

QRZ Now - Tue, 11/24/2020 - 06:59

“The Gathering” will be the theme for the 2021 Dayton Hamvention®. Hamvention General Chair Rick Allnutt, WS8G, said the theme reflects what has been missing from our lives most of this year.

“We have spent the last 6 months being bound to our houses and small groups,” he said. “We are very optimistic that when May arrives, we will be allowed to get together.”

Allnut, a medical doctor with a master’s degree in public health, said Hamvention management is closely following the coronavirus situation and believes it will improve enough by May that government restrictions on travel and large groups will be relaxed. The Hamvention team will continue to follow developments.

“We hope we will all be able to get together, talk about ham radio, and share the interaction we have missed,” Allnutt said. “The Gathering” theme acknowledges the role that Hamvention plays in amateur radio.

Hamvention 2021 will be held May 21 – 23 at the Greene County Fairgrounds and Expo Center in Xenia, Ohio.

source:ARRL

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Antenna Vertical Dipole Array by OH1TV January 13, 2017 No comments

An easy to build antenna for seaside locations 17m and 15m versions were used at 9M0O DX-pedition in 2016   Some notes • Wire lengths R and D are... Read more

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News Best Black Friday Deals for 2020 for HAM RADIO November 24, 2020 No comments

Best Black Friday Deals for 2020 for HAM RADIO Read more

Dayton Hamvention Announces its 2021 Theme — “The Gathering” November 24, 2020 No comments

“The Gathering” will be the theme for the 2021 Dayton Hamvention®. Hamvention General Chair Rick Allnutt, WS8G, said the theme reflects what has been... Read more

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The post Dayton Hamvention Announces its 2021 Theme — “The Gathering” appeared first on QRZ NOW - Ham Radio News.

Still Time to Apply for Foreign Service Information Management Technical Specialists-Radio Positions

QRZ Now - Tue, 11/24/2020 - 06:53

The deadline to apply for US Department of State Foreign Service Information Management Technical Specialists-Radio (IMTS-R) positions is December 1, 2020.

Foreign Service IMTS-Rs design, install, and maintain radio and telecommunications systems. They provide radio support for presidential, congressional, and other VIP visits. These radio specialists work from a regional location, overseas, or domestically.

Extensive travel is required to support radio telecommunications systems, such as land mobile radio (LMR), HF, VHF, and UHF radio networks at State Department missions around the world.

Potential applicants should read the Foreign Service Specialist Foreign Service Specialist selection process page before applying. To begin the online application process, visit position announcement. The deadline to submit completed applications is December 31, 2019. Applicants must be US citizens, at least 20 years old to apply, and at least 21 years old to be appointed. Applicants must also be available for worldwide service and be able to obtain all required security, medical, and suitability clearances. Email for additional information. 

SOURCE:ARRL

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Dayton Hamvention Announces its 2021 Theme — “The Gathering” November 24, 2020 No comments

“The Gathering” will be the theme for the 2021 Dayton Hamvention®. Hamvention General Chair Rick Allnutt, WS8G, said the theme reflects what has been... Read more

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The post Still Time to Apply for Foreign Service Information Management Technical Specialists-Radio Positions appeared first on QRZ NOW - Ham Radio News.

Jeep trail ride and ham radio

QRZ - Tue, 11/24/2020 - 01:23

The ARRL Letter, November 19, 2020

QRZ - Mon, 11/23/2020 - 18:00

Hamvention 2021 Update

QRZ - Mon, 11/23/2020 - 15:18

Dayton Hamvention Announces its 2021 Theme — “The Gathering”

ARRL - Mon, 11/23/2020 - 14:49

“The Gathering” will be the theme for the 2021 Dayton Hamvention®. Hamvention General Chair Rick Allnutt, WS8G, said the theme reflects what has been missing from our lives most of this year.

“We have spent the last 6 months being bound to our houses and small groups,” he said. “We are very optimistic that when May arrives, we will be allowed to get together.”

Allnut, a medical doctor with a mast...

Still Time to Apply for Foreign Service Information Management Technical Specialists-Radio Positions

ARRL - Mon, 11/23/2020 - 14:42

The deadline to apply for US Department of State Foreign Service Information Management Technical Specialists-Radio (IMTS-R) positions is December 1, 2020.

Foreign Service IMTS-Rs design, install, and maintain radio and telecommunications systems. They provide radio support for presidential, congressional, and other VIP visits. These radio specialists work from a regional location, overseas, or ...

QSO Today Interviews Ralph Haller N4RH

QRZ - Mon, 11/23/2020 - 14:19

Arrecibo Observatory to be Demolished

QRZ - Sun, 11/22/2020 - 23:46
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