“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
Hambuilder All Band Trx Full set (RTC03+BritX+HBRF01+20WPA) fully assembled
Hambuilder HBR8HF HF transceiver full set board and parts This is an assembled and tested board set for build fully operated HF All band transceiver c… Read more
1:1 Current balun Dual core 1500 watts RTTY, 5KW ICAS
1:1 dual core current balun Constructed using dual 240/31 cores. Stainless steel hardware. 1-61MHZ With dual cores you get great frequency range, equ… Read more
LDG RT-100 Remote Tuner
RT-100 LDG has announced the RT-100. The RT-100 is a 100 watt coax in / coax out remote tuner designed to be placed near the feedpoint of the antenna…. Read more
QRPver-1-v-2-JT65-PSK-BPSK-QRP-Transceiver
This is the SINGLE BAND , ONE frequency JT65 / PSK / BPSK QRP Transceiver. This small size QRP transceiver has about 1 Watts output power built on the… Read more
XTRX – A high-performance SDR in a mini PCIe form factor
A high-performance SDR in a mini PCIe form factor Features & Specifications RF Chipset: Lime Microsystems LMS7002M FPRF FPGA Chipset: Xilinx Artix… Read more
Review
Book Review: Radio Frequency Interference (RFI) Pocket Guide
“Radio Frequency Interference (RFI) Pocket Guide” by Kenneth Wyatt, WA6TTY and Michael Gruber, W1MG This small 88-page spiral bound (3” x 5”) pocket g… Read more
BaofengTech UV-50X2 Testing : Ham Radio 2.0
X-SERIES BTECH MOBILES The X-Series Mobiles introduce our new fully customizable Multi-Color LCD display screen. You can adjust the complete display t… Read more
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IC-7300 [ Downloads ] Instruction Manual and Brochure
IC-7300 Video Review IC 7300 Download´s Read more
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Yaesu FT-991 HF – UHF Transceiver [ Video ]
Universal-Radio presents the Yaesu FT-991 HF – UHF Transceiver Read more
Deciphering Decibels Tell All for Ham Radio
“Decibels got you down? Are dBm and dBW giving you headaches? Is it confusing when sometimes an antenna gain is given in dBi and other times in… Read more
Antenna
CrankIR Series Antenna Vertical
Steppir Antenna Verticals are the only true ¼ wave continuous coverage antennas available for the HF bands. The SteppIR technology has had a pr… Read more
Robot Adds New Twist to NIST Antenna Measurements and Calibrations
The National Institute of Standards and Technology (NIST) has been pioneering antenna measurement methods for decades, but a new robot may be the ulti… Read more
3 element 144MHz LFA-Q Super-Gainer Quad Style Yagi
Description A 3 element 144MHz LFA-Q (Super-rigid Quad-style) Super-Light Quad StyleYagi for 144-146MHz The LFA-Q Packs a bigger punch than a traditio… Read more
7el LFA2 Noise comparison on 50 MHz
VA3NCD had the luxury of being able to install 2 50MHz 7el Yagis for testing one against the other. One an M2 7el JHV, the other… Read more
Mobile Antenna Model 100A-HP 3.2 to 29 MHz
Mobile Antenna Model 100A-HP When properly installed on your vehicle the Model 100A-HP will provide continuous coverage from 3.2 to 29 MHz with the su… 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
Kenwood TS990 UnBoxing and Basic Review
The TS-990S comes equipped with dual receivers for simultaneous reception on different bands, it also features narrow-band roofing filters on the main… Read more
BITX-40 Unboxing by K7AGE
“My BITX-40 40 meter SSB QRP transceiver kit has arrived from India. This kit isells for $59 including shipping. My kit took 17 days to arrive f… Read more
How Does An Inexpensive Transceiver Compare to An Expensive Transceiver
Jim, W6LG looks at http://www.sherweng.com/table.html website with extensive detail about receiver performance. Read more
Icom IC-9100 – QST Review
Icom IC-9100 Mark J. Wilson, K1RO, k1ro@arrl.org Reviewed by Rick Lindquist, WW3DE National Contest Journal Managing Editor ww3de@arrl.org The only re… Read more
Digital Modes
New Ham Shack Part 4, Audio Mixer Installation by K7AGE
In this video I show you how I setup an audio mixer for my ham radio station. I am using this mixer to monitor the audio outputs from my Elecraft K3,… Read more
RTTY Contest Champ Don Hill, AA5AU, Achieves Remote Contesting Milestone
Champion RTTY contester Don Hill, AA5AU, of Louisiana may be the first US radio amateur to operate SO2R (single operator, two radio) remotely in an RT… Read more
Digital Activity Days RDRC “01-10” – Rules
RDRC Objective: Attraction of radio amateurs to the development of digital reports and software for various digital modes. Participants: Licens… Read more
World Digital ATV QSO Party Marks 5th Year
The World Digital Amateur Television (DATV) QSO Party will celebrate its 5th year when it gets under way August 21-22. Organizer and anchor Peter Coss… Read more
App – Mobile
Amateur Radio Ringtone from NASA
Download NASA Sounds Here’s a collection of NASA sounds from historic spaceflights and current missions. You can hear the roar of a space shuttl… Read more
Nifty app uses Morse code to send Apple Watch messages
Although there are ways of messaging people with the Apple Watch — either with Siri dictation, or using pre-written responses and emojis — as far as I… Read more
CWSpeed IOS App – The fun and efficient way of learning morse code
Description The fun and efficient way of learning morse code! Features: – Uses Koch’s training method (the most efficient known to date)… Read more
SmartSDR for iOS v1.0.4 Now Available
FlexRadio Systems announces the release of SmartSDR for iOS v1.0.4 is now available for download or update from the Apple App Store. This release con… Read more
Antenna Tool App – Android
A tool to help ham radio, CB, and other radio users to create antennas of various types. Calculations available for dipole, vertical (1/8, 1/4, 3/8, 1… Read more
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