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The SRF-39 is a portable AM/FM radio introduced in approximately 1992 by Sony. It uses a single AA battery, as its analog electronics require very little voltage. It was one of the first radios to use the CXA1129 30-pin integrated circuit, which later was responsible for the SRF-39's sensitive and selective performance.

A variant of the SRF-39, the SRF-39FP, has a transparent case, designed to thwart contraband concealment. The radio often appears on the commissary lists of U.S. federal prisons, hence the "FP" suffix.

The SRF-39 was followed by the SRF-49 in 1997, the PSY-03 in 1999, and the SRF-59 in 2001. These radios are popular in the DXing community due to their sensitivity, selectivity and ferrite antennas.

See also

• History of radio

References

1. ^ "The Sony SRF-59 Sourcebook 2008-09-09-1". wenku.baidu.com. Baidu. Retrieved 28 January 2022.
2. ^ Hunt, Joshua (January 16, 2014). "The iPod of Prison". The New Yorker.
3. T. Okanobu, H. Tomiyama and H. Arimoto, "Advanced low voltage single chip radio IC". IEEE Transactions on Consumer Electronics, vol. 38, no. 3, pp. 465-475, Aug. 1992, doi: 10.1109/30.156724.
4. D'Onfro, Jillian. "This Prison Radio Lasts Longer Than An iPod, On One Battery". businessinsider.com. Business Insider. Retrieved 28 January 2022.

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