Note
Radio News, Jan 1932, p. 613
Radio News, Mar 1932, p. 797.
Radio Craft, March 1932, inside back cover.
The Hammarlund Comet is was introduced in 1931, and was one of the first commercially successful superheterodyne receivers.
The Comet is an eight-tube receiver with a built-in AC power supply. It has a frequency range of 545 kHz to 20 MHz, and it uses plug-in coils to cover the entire range. The receiver has two 465 kHz IF stages, and it has a variety of features that were advanced for its time, including a fixed-tuned BFO for CW reception, a band-spread control, and a vernier tuning control for the mixer and local oscillator.
The Comet was well-built and had decent performance—again, for its time. It was known for its sensitivity, selectivity, and image rejection. It was also relatively easy to use, and it had a number of features that made it popular with amateurs.
The Comet was discontinued in 1932, and replaced by the Comet Pro.
Here are some of the key features of the Comet:
* Eight-tube superheterodyne receiver
* Built-in AC power supply
* Frequency range: 545 kHz to 20 MHz
* Plug-in coils for covering the entire frequency range
* Two 465 kHz IF stages
* Fixed-tuned BFO for CW reception
* Band-spread control
* Vernier tuning control for the mixer and local oscillator
* Excellent sensitivity, selectivity, and image rejection
* Relatively easy to use
* Requires an external speaker
References
Technical description, part 1. Radio News, Feb 1932, p. 665.
Technical description, part 2. Radio News, Mar 1932, p. 778.
Review. Radio Craft, Apr 1932, p. 594.
