Models TRK-9, TRK-12, TRK-90, and TRK-120: AC, Superheterodyne, High-Picture-Definition, Five-Television-Channel, Receiver and Three-Band, Electric Tuning, AC, Superheterodyne Broadcast Receiver". RCA Victor Service Data Volume II: 1938-1942: Radio Receivers, Phonographs, and Television (PDF) (1sted.). Radio Corporation of America, RCA Victor Division. 1944. pp.261-C, 275-C. Pell, Rich (April 21, 2010). "The RCA phono plug: An outdated relic?". EETimes . Retrieved March 8, 2017.

When connecting the male into the female, the inner hot (signal) connection is made before the ground connection has been guaranteed; this often produces a loud buzz if the equipment is active when the connection is made. While these are the standard colors found on commercially made products, cables with different-colored connectors may be used, as long as the cable itself is compatible with the application (for example, cables with 75 ohms impedance for video and S/PDIF). 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.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] 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. 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. Disadvantages [ edit ] "Bullet plug" variation – Note the hollow center conductor and the pin point for the return signal. The exact release date of this connector is still a little vague. The following dates were derived from historical RCA documentation.

The hot signal wire and signal ground provided by an RCA connection implement an unbalanced connection. A true balanced connection is generally preferred in certain applications, particularly professional settings because it allows for the use of long cables while reducing susceptibility to external noise. 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.