When All Else Fails -
Electrical Calculations
Calculate any of the four major properties of electrical/electronic circuits, voltage, current, resistance, and power.
Simply fill in two known values (leaving two values blank), then click the “Find the Two Unknown (Blank) Values” button.
The widget will calculate the two unknown values & will display the appropriate engineering unit prefix.
Half-Wave Dipoles
The half-wave dipole is one of the most popular antenna types used by amateur (ham) radio operators.
This widget calculates the total length of a half-wave dipole & the length of each leg based upon the frequency, wavelength, & the speed of light (3×108 meters per second). This widget can handle frequencies up to a maximum of 1000 MHz (1 GHz).
SWR Calculator
The SWR (Standing Wave Ratio) is the relationship between the forward power (sent to the antenna) and the reverse power (reflected back to the transmitter).
This widget calculates the SWR given the forward power (in Watts) and the reflected power (in Watts).
USA Ham Callsign Lookup
Search the FCC database for amateur radio operator licenses.
Simply enter the operator’s callsign, FRN (FCC Registration Number), or name (LAST, FIRST).
The results will appear in a new window or tab.
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