“Automatic Gain Control” is the topic of the latest (February 1) episode of the “ARRL The Doctor is In” podcast. Listen…and learn! More than a half-million downloads since its debut in April 2016 attest to the podcast’s popularity.
Sponsored by DX Engineering, “ARRL The Doctor is In” is an informative discussion of all things technical. Listen on your computer, tablet, or smartphone — whenever and wherever you like!
Every 2 weeks, your host, QST Editor-in-Chief Steve Ford, WB8IMY, and the Doctor himself, Joel Hallas, W1ZR, will discuss a broad range of technical topics. You can also e-mail your questions to doctor@arrl.org, and the Doctor may answer them in a future podcast.
Enjoy “ARRL The Doctor is In” on Apple iTunes, or by using your iPhone or iPad podcast app (just search for “ARRL The Doctor is In”). You can also listen online at Blubrry, or at Stitcher (free registration required, or browse the site as a guest) and through the free Stitcher app for iOS, Kindle, or Android devices. If you’ve never listened to a podcast before, download our beginner’s guide.
Equipment
AMPLIFIER HF2013DX-A – HF 2KW
The linear amplifier HF2013DX-A is designed for all shortwave bands from 1.8MHz to 29MHz amateur (including WARC) and all operating modes. It is equip... Read more
New ! Yaesu FT-410
YAESU FT-410 features General Rx Frequency Range: 30 kHz – 30 MHz (operating) 160 – 10 m (specified performance, Amateur bands only) Tx Frequency Ra... Read more
Yaesu announced the external speaker SP-10 and SP-20
Yaesu SP-10 and SP-20 SP-10 and SP-20 On December 8, 2016, Yaesu Radio Co., Ltd. announced the external speaker “SP-10” (12,000 yen tax-ex... Read more
New! YAESU FTA-750L
The YAESU FTA-750L Combines tradition with innovation. Born from a history of high quality communications the FTA-750L now includes a 66 channel GPS... Read more
Airspy HF+ (Coming soon)
Airspy HF+ The Software Defined Radio revolution brought great flexibility in VHF and UHF reception. Today we offer the best wide band receivers which... Read more
Review
![Yaesu M1 – Desktop Microphone [ Video ]](http://qrznow.com/wp-content/uploads/2017/01/m1-190x122.jpg)
Yaesu M1 – Desktop Microphone [ Video ]
Photo by Maggi Luigi IV3YER The Yaesu M-1 is a high-quality, innovative desktop microphone, designed for the discriminating operators. It features co... Read more
Icom ID-4100 D-Star – Review
Since the introduction of D-STAR in 2001, Icom has been committed to improving and advancing the D-STAR experience. The ID-4100A and it’s advance tech... Read more
Review of RigExpert AA-55 ZOOM Antenna and Cable Analyzer
“This video is a comprehensive review of the functions and operation of the RigExpert AA-55 ZOOM Antenna and Cable analyzer. This lightweight po... Read more
YAESU FT 891 Unpacking and First Look – Waters & Stanton Ltd
FT-891 HF+50Mhz ALL MODE MOBILE TRANSCEIVER The FT-891 HF All Mode Mobile Transceiver once again continues Yaesu‘s legacy for legendary receiver... Read more
![Clean up your shack – RSGB Convention lecture 2015 [ Video ]](http://qrznow.com/wp-content/uploads/2017/02/lte-u-640x292-190x122.png)
Clean up your shack – RSGB Convention lecture 2015 [ Video ]
Ian White, GM3SEK gives helpful advice about how to reduce noise levels on receive and avoid causing RF Interference. Read more
Antenna
How To Use An Antenna Analyzer – Basics by K7AGE
Antenna Analyzer “I show you how to use an MFJ 259/269 Antenna Analyzer to check your antenna for SWR and resonance.” Read more
Building a Multi-Band Dipole
Multi-Band Dipole I built a multiband dipole that will work 40, 20, 17, and 10 meters for ham radio. An easy project I was able to tackle in one day.... Read more
Comet Antenna – Full Catalog (.pdf)
Download Comet Antena catalog in (.pdf ) : Read more
100 Ft Balloon Antenna by KN9B
100 Ft Balloon Antenna “Our radio club yearly Special Event (SE) has experienced low signal strength and poor signal reports. We needed a better... Read more
Butternut HF5B 5-Band Butterfly Beam Antenna
Butternut HF5B 5-Band Butterfly Beam Antenna Five popular HF bands 20, 17, 15, 12 and 10 meters in a rotatable, two element beam? No Lossy trap... Read more
Review
Review: SOTABeams WSPRLite HF WSPR transmitter
Reviewing the WSPRlite transmitter by SOTABeams. Includes a description, demonstration and a look inside. In conjunction with the DXplorer website it... Read more
QRP Rig Comparison , FT817 / X108G / X5105 / mcHF RS-918
Here is a video explaining the basic comparisons to each one of these radios Read more
Icom IC 7851 vs IC 7800 Local Oscillator C N Characteristics Comparison
Icom IC 7851 vs IC 7800 Video from Icom Inc. showing a local oscillator C/N characteristics comparison between Icom’s IC-7851 and IC-7800 HF/50/... Read more
The TAK-Tenna Review – A Limited Space HF Antenna
“As you may know, a big percentage of this web site is dedicated to building antennas and not buying them, but sometimes an antenna comes along... Read more
Digital Modes
JT65 ‐HF Operator’s Guide
JT65 An introduction to JT65: A weak‐signal high frequency digital mode WSJT modes of di it l digital communi ti ca on were ori i ll g na y dl d eve o... Read more
Digital Mode FT-8 With Light Bulb Antenna 750 Miles!
Jim, W6LG tries FT8 using light bulbs as the antenna and communicates with another ham in Canada. The distance was 750 miles or about 1200km! This is... Read more
Fldigi v3.23.16 now available
The hard-working development team led by W1HKJ have announced the release of Fldigi v3.23.16. This version of Fldigi is a maintenance release with a v... Read more
FT-8 Digital Mode Has Taken Over The HF Bands!
“Finally got my antenna back up today, decided to take a browse through the bands. There is a ton of FT-8 to be had on all the HF bands. Don... Read more
Raspberry Pi Ham Radio SSTV
In this project the Raspberry Pi with the PiCam is used as a wireless camera which can transmit images over long distances, usually hundreds of meters... Read more
App - Mobile
The World Wide Repeater Directory
RT Sytems and RFinder – The World Wide Repeater Directory bring integrated routing to radio progamming! Once again RFinder and RT Systems... Read more
RFinder – The World Wide Repeater Directory now has Jamming Reports!
RFinder now includes the ability to make jamming reports. This is already available in RFinder Android and should be available on iOS devices by Dayto... Read more
EchoLink for iOS version 2.6.14 is now available
EchoLink for iOS version 2.6.14 is now available in the App Store. This is a 64-bit build that is fully compatible with iOS 10 and modern iOS devices.... Read more
Koch Morse Trainer Pro – Android App
Take your morse code to the next level with Koch Morse Trainer Pro. The only trainer that supports prosigns (procedural signals) and non-english cha... Read more
HF Beam Antenna Calculator for Iphone and Ipad
Antenna Calculator The Maidenhead & HF Beam Antenna is a useful utility to calculate the the Maidenhead LOCATION as well as HF Elements’ s... Read more