Antennas
The Antenna Performance Specialties APS-13 is modeled here.
The Antenna Performance Specialties APS-9B is modeled here.
The Channel Master Stereo Probe 9 is modeled here.
The Winegard HD6065P is modeled here.
The Antennacraft FM6 is modeled here.
The Antennacraft FM10 is modeled here.
The Antennacraft FM13 is modeled here.
The Finco FM-4G is modeled here.
The Finco FM-5 is modeled here.
The Triax FM 5 is modeled here.
The Triax FM 8S is modeled here.
The Körner 17.5 is modeled here.
The Körner 15.10 is modeled here.
A narrowband low-backlobe Yagi is optimized here.
A narrowband maximum-gain Yagi is optimized here.
A high-performance Yagi for 88–92 MHz is optimized here.
A decent small Yagi is optimized here.
A circularly polarized Quadix is optimized here.
A circularly polarized cubical quad is optimized here.
A circularly polarized attic loop is optimized here.
A circularly polarized indoor loop is optimized here.
Circularly polarized rabbit ears are optimized here.
A wideband vertically polarized omni is optimized here.
A tilted dipole with gain is optimized here.
A simple 75Ω coax balun is described here.
Antenna gain versus height is shown here.
Antenna performance curves are shown here.
Tuners
The Sony XDR-F1HD is reviewed here.
The Sangean HDT-1 is reviewed here.
The Sangean HDT-1X is reviewed here.
The Kenwood KT-880D is reviewed here.
The Pioneer F-90 is reviewed here.
Circuits
A quadrature multipath monitor is described here.
Multipath outputs are added to a tuner here.
A simple RF preamp is described here.
A simple IF amplifier is described here.
RF AGC eliminates front-end overload here.
IF AGC improves selectivity here.
Noncentered IF filters are accomodated here.
An LC IF filter is described here.
A deemphasis converter is described here.
Measurements
IEEE 185-1975 is updated here.
Bob & Ken's passband inversion trick is explained here.
Using the Wavetek SAM for 88–108 MHz FM is described here.
The Sound Technology 1000A FM Alignment Generator is improved here.
Several ways to match 50Ω to 75Ω are described here.
Benefits of swept front-end alignment are shown here.
An alternative IF/detector alignment is proposed here.
Modulation-induced noise is described here.
The enigmatic dBµ is explored here.
HD Radio
HD Radio self-noise is described here.
HD Radio self-noise is analyzed here.
How IF filters affect HD Radio self-noise is shown here.
A postdetection filter for HD Radio signals is described here.
Harmonic cancellers for HD Radio signals are described here.
HD Radio time alignment is measured here.
Stereo
Mono and stereo FM noise are compared here.
Optimal and LSB stereo FM decoding are analyzed here.
Changing hi-blend to flat blend is described here.
Software
A composite stereo generator can be downloaded here.
A multitone generator can be downloaded here.
A white noise generator can be downloaded here.
A distortion generator can be downloaded here.
A THD calculator can be downloaded here.
An RMS calculator can be downloaded here.
An FM intermod calculator can be downloaded here.
An RC rolloff calculator can be downloaded here.
A deemphasis calculator can be downloaded here.
A mismatch loss calculator can be downloaded here.
A series section calculator can be downloaded here.
A transmission line calculator can be downloaded here.
An RF-level units converter can be downloaded here.
A postdetection-filter optimizer can be downloaded here.
An interchannel cross-correlator can be downloaded here.
A power measurement corrector can be downloaded here.
An FM station identifier can be downloaded here.
An RDS PI code calculator can be downloaded here.
