5965

5965
5965
Classification	Triode
Service	Digital computers
Height	1+15⁄32 in (37 mm)
Diameter	7⁄8 in (22 mm)
Cathode
Cathode type	Unipotential
Heater voltage	6.3 V or 12.6 V
Heater current	450 mA or 225 mA
Anode
Max voltage	200 V
Max current	100 mA
Socket connections
	9A source ↗ Pin 1 – Unit 2 Anode (Plate) ; Pin 2 – Unit 2 Grid ; Pin 3 – Unit 2 Cathode ; Pin 4 – Unit 2 Heater ; Pin 5 – Unit 1 Heater ; Pin 6 – Unit 1 Anode (Plate) ; Pin 7 – Unit 1 Grid ; Pin 8 – Unit 1 Cathode ; Pin 9 – Heater mid-tap (bottom view)
References
	https://web.archive.org/web/20230314212705/https://frank.pocnet.net/sheets/137/5/5965.pdf

The 5965 is a miniature twin triode vacuum tube (thermionic valve) "designed for use in high-speed digital computers".¹

According to an MIT Project Whirwind memorandum, the tube was developed c.1953 for IBM by GE, primarily for use in the IBM 701 computer, and was designated as a general-purpose triode tube.² In European use the tube was labelled E180CC; sometimes the same tube was labelled with both names.³

Vacuum tube logic module from a 700 series IBM computer featuring 5965 tubes. source ↗

References

Sylvania. Engineering Data Service. 5965. November 1953.
Frost, H. B. (May 4, 1953). "Memorandum M-2135: Some notes on current tube types" (PDF). MIT. p. 3. Archived from the original (PDF) on 28 March 2021. Retrieved 12 February 2024.
Wyatt, Allan (27 December 2012). "5965". The Valve Museum. It is also labelled as a E180CC showing that the two Types are equivalent.

[1] Sylvania. Engineering Data Service. 5965. November 1953.

[2] Frost, H. B. (May 4, 1953). "Memorandum M-2135: Some notes on current tube types" (PDF). MIT. p. 3. Archived from the original (PDF) on 28 March 2021. Retrieved 12 February 2024.

[3] Wyatt, Allan (27 December 2012). "5965". The Valve Museum. It is also labelled as a E180CC showing that the two Types are equivalent.

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See also

References