Used the the pH reagent from Freshwater Master Test Kit bought from Amazon, which can test 200 samples for pH, ammonia, nitrate and nitrite. Testing pH is quite
In the world of PCB design, the top-of-board silkscreen is the layer of ink used to print identifying information directly onto the top surface of the circuit board.
Yesterday I had posted about plans to implement thermal protection for my homebrew HF linear amplifier of VU2EVQ design. Had ordered a digital temperature controller thermostat from Amazon
Building a reliable HF linear amplifier, especially one utilizing robust components like the IRFP150, requires more than just a solid RF deck. The protection circuitry acts as the
Lineup for this testing: 5W set in FT-710, AM Mode, running on 12V LiFePO410m HLF 200 patch cable from radio to linear amplifierVU2EVQ Design HF linear amplifierATU-100 External
The VU7 activation scheduled to begin tomorrow, Tuesday, February 10, 2026, is the AU7RS DXpedition from Agatti Island, Lakshadweep. Originally planned for an earlier start, the team faced
Predicting DX openings (long-distance contacts) is part science and part intuition. While the sun determines the potential, web-based tools provide the clarity needed to know when to turn
