“Microphones” is the topic for the latest (April 12) episode of the “ARRL The Doctor is In” podcast. Listen…and learn!
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.
VHF
Vertex VXD-720
Vertex VXD-720 Clear, Quality Communications 512 Channels and 512 Groups 5 Watts VHF / 4 Watts UHF VHF: 136 – 174 MHz UHF: 403 – 470 MHz; 450 – 512 MH... Read more
Icom IC-2730A vs IC-2720
Ray Novak and George Thomas compare the IC-2730A to it’s predecessor, the IC-2720. Read more
145 MHz Low Loss Bandpass Helical Filter
Low Loss Bandpass by Mile Kokotov Basic design of the filter is from RSGB VHF-UHF Manual, but I made some modifications. Both Inductors... Read more
Google Repeater Mapping – K5EXH
Visit the Web Site and seach for city: Google Repeater Mapping Sample New York: Read more
RFinder – The World Wide Repeater Directory now supports DMR-MARC WW Network!
RFinder and DMR-MARC.net has completed its integration… RFinder now has a regular feed of the DMR Repeater list (MOTOTRBO, a.k.a. TRBO) worldwid... Read more
Announcing the TYT MD-UV380 Dual Band DMR Radio
“We received an announcement from TYT last night that a new DMR radio will be coming soon. We haven’t received a lot of details, but it lo... Read more
Equipment
Little Boy — An LDMOS HF Amplifier
Little Boy — AN LDMOS HF Amplifier by W6KANI recently watched the movie Fat Man and Little Boy, a 1989 great movie about the Manhattan project a... Read more
Yaesu Catalog – VHF and UHF
YAESU Catalog – The Radio The Yaesu brand is well known among ham radio aficionados and is synonymous with premium quality ham radios. From sta... Read more
PPG100 Portable Power Generator
Midland Radio has been a show participant at the Consumer Electronics Show for several decades. Long an industry leader in two-way radio technology in... Read more
The “Splinter II” QRPp Receiver / Transmitter
Like the original Splinter…only better! Here’s what you get: 1. 40 meter DC receiver with improved audio. 2. Sidetone volume is now variable. 3... Read more
Elecraft KX3 GoBox
As I was contacted by a few HAMs where to get “my” box I would like to give you a little parts-overview. Unfortunately I`m not able to manufacture thi... Read more
Review
RF Pro 1B Initial Review – K2RWF
Rob Fissel, K2RWF shares his testing of the DX Engineering RF-PRO-1B Active Magnetic Receive Loop Antenna. Pixel Technologies Active Magnetic Loop Ant... Read more
Controlling the OM2000A+ from Tablet
The automatic linear amplifier OM2000A+ is designed for all short wave amateur bands from 1.8 to 29 MHz (including WARC bands) + 50 MHz and all modes.... Read more
Simple SWR Indicator for QRP
Simple SWR Indicator for QRP, just a ferrite, a wire and a LED. Read more
IC-7610 Review with Amateur Logic and Icom’s Ray Novak
George and Tommy, from Amateur Logic review the IC-7610 with Ray Novak from Icom. During their review they discuss the radio’s key features and... 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
Hamfest 2017 – Preview of the Icom IC-7610 and IC-R8600 rigs
In part one of our reports from Hamfest 2017 we have a sneak preview of the Icom IC-7610 and IC-R8600 rigs. We meet the new owners of PW Magazine, and... Read more
Antenna
Arduino Mega2560 based Antenna Rotator Controller
by Vinod Es “Well after a long time I am back with a new project ! This is an attempt to build an Antenna rotator controller using Arduino Mega... Read more
Two element QUAD antenna Model RQ-26H
Antenna RQ-26H- preset “Cubical Quad” on the bands 6, 10, 12, 15, 17, 20 m with heavy duty design. It uses the most advanced composite mat... Read more
An Intro and Antennas – Nuts and Volts Magazine
An Intro and Antennas – Nuts and Volts Magazine by H. Ward Silver Read Full Article: Read more
HF Portable Par End-Fedz EF-20, Jackite Fiberglass Pole Deployment
This video shows how easy is is to set up an end-fed HF antenna and a fiberglass pole, even in non-ideal weather. Sorry for the water on the lens; the... Read more
New InnovAntennas Quads
NEW FOR 2018! Following on from our successful LFA-Q compact quads, we are adding a more traditional looking quad to our range which boasts two of the... Read more
80 METER FRAME ANTENNA
by Harry Lythall – SM0VPOI keep on and on about my little balcony and the antenna restrictions it imposes on my HF antennas. This projects was d... Read more