Answer by Jason Burnfield: On Tue, May 26, 2026 at 1:33 AM Andrew Thornett wrote: Can I ask you for your back of envelope dB calculation on the trace from my…
In ezRA’s ezCon, the plotted values are usually displayed in the raw linear units from the processed data files. If you want to express them in decibels (dB), the conversion…
Yes, that can work, and it’s a fairly common trick for long conduit runs. The usual method is: For a 50 m conduit, suction is often more effective than trying…
For a VLF loop antenna (typically covering a few kHz up to perhaps 30–300 kHz), a balanced amplifier should ideally have: Several approaches work well: Instrumentation Amplifiers These are often…
An RF choke is an inductor designed to present a high impedance to radio-frequency currents while allowing DC or low-frequency currents to pass. The best design depends on the frequency…
The HP 10509A Circular Loop Antenna is a specialized active magnetic-loop receiving antenna developed by Hewlett-Packard in the early 1960s. It was originally supplied with the HP 117A VLF Comparator…
A balanced feed line is a transmission line in which the two conductors carry equal currents in opposite directions, and neither conductor is connected to ground. The electromagnetic fields are…
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For a WR-650 waveguide at the 1420 MHz hydrogen line, the internal dimensions need to be about 165 mm × 82.5 mm (6.5″ × 3.25″). That means you’re looking for…
Yes, a pyramidal horn antenna can generally be made larger by adding an additional flared section to the front, but there are some important caveats. A horn antenna works by…
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