Miniature relays

In the 1970s, Tek produced their own miniature relays in-house that were used in some 7000-series plug-ins such as the 7A11, 7A12, 7A13, 7A14, and other equipment. These relays have a tendency to fail and have become very rare.

Interestingly, Tek appear to have manufactured replacements based on commercial relays in TO-5 metal can cases soldered to small carrier boards with pins matching the Tek sockets.

Some of these relays have symmetrical socket layouts so that they can be installed in both possible 180° rotated positions.

Possible repair strategies include "micro-surgery" (Ref.1) or installing modern miniature gold-contact relays on top of the cut-off base.

Tek P/N	Contacts	Coil	Used in	Replacement
148-0034-00	DPDT	15 V 600 Ω	7A11: K401,K403,K405,K407,K411,K413,K415,K417,K431 7A13: K47,K48,K480,K490 7A14: K50,K62,K330 7B70, 7B71: K6,K44,K48,K138,K780	AXICOM V23079-D2003-B301 (Ref. 2) Omron G6N, G6S
148-0034-03	DPDT	15 V 600 Ω	7A11 B100000+: K401,K403,K405,K407,K411,K413,K415,K417,K431	AXICOM V23079-D2003-B301 (Ref. 2)
148-0035-00	SPDT	15 V 600 Ω	7A13: K60,K61 7A14: K51,K52,K53,K54,K155,K160,K180,K235,K280 7B70, 7B71: K3
148-0043-00	DPDT	24 V 1325 Ω
148-0050-00	SPST	12 V	7A13: K10,K30
148-0054-00	SPDT+SPST	15 V	7A13: K7,K27
148-0055-00	SPDT+SPST	15 V	7A13: K6,K26
148-0058-00		4 V 130 Ω	7A11 Probe: K55,K59
148-0076-00	SPST (reed)		7L12: K1470
148-0080-00	DPDT	5 V at 65 Ω
148-0087-00	SPDT	90 mW	7L12: K300,K353,K356,K1200
148-0088-00	DPDT	120 mW	7L12: K281,K354,K355,K357,K1130,K1400,K1450
148-0107-03	SPDT		TO5 replacement
148-0107-04	DPDT		TO5 replacement for 148-0055-00 (7A13: K6,K26)
108-0599-00	SPST (reed)		7T11: A3K31,A3K32,A3K70,A3K71,A3K80