Consumer Electronics Association standard CEA-863-B - Connection Color Codes for Home Theater Systems, CEA, February 2011, archived from the original on 2011-07-12 , retrieved 2011-08-27

Alan Henry (25 December 2013). "How To Connect Your Old Video Game Consoles To A New TV". Kotaku . Retrieved 27 November 2016. RCA 45 RPM 9-JY Record Player and RCA Tube Radio 6-XD-5". BlueBoy Records. Archived from the original on 2011-09-10 . Retrieved 2011-08-23. Model U-109: Sixteen-Tube, Three-Band, A-C, Radio-Phonograph". RCA Victor Service Notes for 1937 Broadcast Radio Receivers, All-Wave Radio Receivers, Phonograph Combination Instruments, and Miscellaneous Service Information (PDF) (1sted.). RCA Manufacturing Company. p.256.

a b Richardson, Paul (June 1938). "Improved Electric Tuning For All Is Keystone of New RCA Victor Standard Line of Domestic Models" (PDF). RCA Globe Trotter. Vol.2, no.3. p.15. Models R-96 and R-97: Three-Tube, A-C, Electric Phonographs". RCA Victor Service Notes for 1937 Broadcast Radio Receivers, All-Wave Radio Receivers, Phonograph Combination Instruments, and Miscellaneous Service Information (PDF) (1sted.). RCA Manufacturing Company. p.290. By no later than 1937, RCA introduced this connector. In 1937, it was used inside a RCA model U-109 radio- phonograph and model R-97 phonograph. In the U-109, the internal amplifier chassis had female connectors which accepted male cables from the internal radio chassis and built-in phonograph player. [9] [10] Originally, the concept was intended as an easy method to unhook sources while troubleshooting the console during servicing. [ citation needed] The male plug has a center pin that is 3.175mm (1/8inch) in diameter, and is surrounded by an outer shell that is 8.25mm (1/3inch) in diameter.

Pell, Rich (April 21, 2010). "The RCA phono plug: An outdated relic?". EETimes . Retrieved March 8, 2017.In 1939, RCA introduced two radio- television floor consoles (TRK-9, TRK-12) which used the same internal connection concept but the audio output of the television chassis was connected to the radio/amplifier chassis via a male to male cable. [14] Three lower-cost 1939 television models had an audio output connector on their rear panel instead of an integrated amplifier and speaker: RCA TT-5, Westinghouse WRT-700, GE HM-171. [11] [15]