“Vacuum Tubes” is the topic of the current (February 15) 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.
VHF
Low cost 10Ghz EME Rx System
1 – Low cost 10Ghz EME Rx – The LNBF 2 – Modifying the LNBF 3 – Tuning the LNBF 4 – Pictures and PlotsNOTE: This... Read more
Retevis RT95 Budget Dual Band Mobile Transceiver
Specifications GENERAL Frequency Range VHF:144-148MHz UHF: 430~440MHz Number of Channels 200 channels Channel Spacing 25K (Wide Band) 20K(Middle Band)... Read more
Recent activity on the 23cm band RNSS Coexistence Studies
The Chair of IARU Region 1 Spectrum Affairs, Barry Lewis G4SJH, reports on the work being done in defending the interests of the Amateur Services... Read more
Ionospheric radio propagation, Skywaves, Skip Distance, & Skip Zone are key aspects
Understanding the way in which HF radio signals actually propagate can help the effects of ionospheric propagation to be used to its best. Skywaves, s... 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
The first video from Yaesu FT-2D
Yaesu FT-2D Read more
Review
Station Grounding for Amateur Radio
Station Grounding for Amateur Radio Read more
Langstone Project – SDR Transceiver using an Adalm PlutoSDR
https://www.youtube.com/watch?v=TgAkcmd7ixA Read more
Test Equipment Basics – Ham Nation 389
Relief efforts in Cuba, testing equipment, aurora updates. Coordinating emergency communications in Cuba, Dr. Skov with solar weather and an aurora up... Read more
Ofcom engineers shine a light on interference issue
Ofcom’s spectrum assurance team recently solved a sky-high interference case that took more than a little detective work to crack. The team were conta... Read more
Turn a Cheap Ham Radio Into An APRS & WinLink Transceiver
“Today we take a look at the Mobilinkd TNC3. The TNC3 uses the KISS protocol to feed packet data to your phone or computer over bluetooth. Its a... Read more
SharkRF Openspot3, The Most Advanced Digital Ham Hotspot!
Compatible digital radio protocols and networks DMR (BrandMeister, DMRplus, DMR-MARC, Phoenix, XLX, TGIF) D-STAR® (DCS, REF/DPlus, XRF/DExtra, XLX) Sy... Read more
Equipment
EXPERIMENTAL SWRX
The Stampfl receiver is still in its experimental stadium and is not, comparable to a KWZ-30, Reuter or Perseus receiver. But an Assembly kit for the... Read more
Five-Watt SDR Transciever for Hams – RS-HFIQ 5W Software Defined Radio
The RS-HFIQ is a high performance Software Defined Radio (SDR) 5W Transceiver for CW, SSB, AM, FM and digital modes. Product Summary Not just another... Read more
Radio Incident Command Kit by N1RFD
What is my definition of a Communications Go-Kit? A Communications Go-Kit (or Radio-Ready-Kit) is made up of a portable “Amateur radio” st... Read more
AOR AR8200 -MK3 ( 500KHz to 3GHz )
Prepare to be astounded at the versatility and broad range of features found in the AOR AR8200 Mark III. Unparalleled frequency coverage, superb sensi... 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
![Yaesu FTDX101D [ Preliminary Information ]](https://qrznow.com/wp-content/uploads/2018/08/FTDX101MP-190x122.jpg)
Yaesu FTDX101D [ Preliminary Information ]
Yaesu FTDX101D As you are aware there is the soon to be released Yaesu FTdx101D 100W SDR transceiver. I am also pleased to announce the big brother of... Read more
Antenna
4 element 50MHz LFA-Q Yagi (4m)
A 4 element Low Noise, High Gain Directional Loop array (LFA-Q) Quad Beam The G0KSC LFA-Q possess all of the design traits InnovAntennas have become w... Read more
Little Tarheel II | Mobile HF 80-6 Meter Ham Radio Antenna
The Little Tarheel (TH-1L), when properly installed on your vehicle, will provide continuous coverage from 7.0 to 54 MHz with the supplied whip. The L... Read more
QST Antenna Design Competition Submission Deadline Looms
The deadline to submit a design for the 2018 QST Antenna Design Competition is just ahead — September 1! The competition challenge is to design the be... Read more
The Mighty Rhombic, the King of Antennas
“There was a time, back in the 1930s and 1940s, when the rhombic antenna was the king. A remarkable antenna that had phenomenal directivity and... Read more
JK402-PICCOLO 2 Elements on 40M / 18 Foot Boom
The JK402P (Piccolo) is a 18Ft boom 2 element 40m Yagi that has excellent gain and F/R. The elements are loaded Capacitively & Inductively which... Read more
KM4ACK End Fed Half Wave Antenna Build And Review
KM4ACK End Fed Half Wave Antenna Build And Review Kit includes everything you need to build a 49:1 end fed half wave antenna. Antenna works without ne... Read more
Digital Modes
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
FT8 DXpedition Mode Field Test Attracts Upward of 500 Participants
It was the Fox and the Hounds on the bands March 6, as the WSJT-X development group conducted a field test of the still-beta FT8 DXpedition Mode. A se... Read more
New Digital Modes Changing Complexion of Bands and Perhaps of Ham Radio
The wave of software-based digital modes over the past several years has altered the atmosphere of the HF bands. Some suggest the popularity of modes... Read more
The FT4 Protocol for Digital Contesting by K1JT
Joe Taylor, K1JT, Steve Franke, K9AN, and Bill Somerville, G4WJS April 22, 2019 Introduction: FT4 is an experimental digital mode designed specificall... Read more
STEVE ANDREW’S SPECTRUM ANALYSER SOFTWARE
“We are pleased to announce the availability of V1.0a of the Spectrum Analyser software developed by Steve Andrew specifically for the RSP line... Read more
