The magnetic loop antenna is a familiar sight in radio amateur circles as a means to pack a high performance HF antenna into ...

ABSTRACT: On 25 October 2013, the Sun emitted two significant solar flares. The first solar flare, classified X1.7, peaked at 08:01 UT. The second one, X2.1, peaked at 15:03 UT and was accompanied by ...

6 Best HF Antennas for 2025 to Boost Your Ham Radio Signal Anywhere Links to the best HF Antennas are listed down below: 6. Moonraker Ltd GPA-80 5. DX Engineering XB-5 Hexx Beam HF Antenna 4. Foul ...

ABSTRACT: This note describes optimally matching the seminal Fano Load using Central Force Optimization with Negative Gravity. This approach improves the best fitness by more than eighteen percent and ...

In this comprehensive systematic review of randomized controlled trials, which included a total number of 471 patients, torsemide significantly reduced HF and CV-related hospital readmissions compared ...

HF results in pulmonary and peripheral edema due to a decrease in cardiac output and retention of free water by the renal tubules. This fluid retention causes dyspnea, orthopnea and fatigue leading to ...

Raspberry Pi Zero 2 W-based 3-antenna switch for HF (100W), controlled via Flask. Uses ANMBEST 4-channel relay (active HIGH), Freenove Breakout Board HAT, and SO-239s in a DXE-UE-2P box with Alpha ...