Cascade noise figure calculator
Cascade noise figure calculator using the Friis formula — each stage’s contribution, noise temperature, and where to put the preamplifier in your receive chain.
Receiver sensitivity and MDS calculator
Receiver sensitivity calculator — MDS noise floor from bandwidth and noise figure, conversion to microvolts and a comparison with external band noise.
IP3, intermodulation and dynamic range calculator
IP3 calculator — intercept point from a two-tone test, third-order product levels, the DR3 dynamic range and how an attenuator changes it.
S-meter calculator: S-points, dBm, microvolts
S-meter calculator — S-units ↔ dBm ↔ microvolts ↔ dBµV on the IARU scale for HF and VHF. What S9 really means in microvolts.