Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 167,859 pages of information and 247,161 images on early companies, their products and the people who designed and built them.
Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 147,919 pages of information and 233,587 images on early companies, their products and the people who designed and built them.
The B29 receiver (also known as the CR200) was a low frequency radio receiver for submarines and surface ships, covering the frequency range 15 kHz to 550 kHz in 4 bands. It was built in the United Kingdom by the Marconi's Wireless Telegraph Co.
The CR100, CR150 and CR300 look similar but cover HF bands.
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