Miniature relays: Difference between revisions

Revision as of 16:13, 13 October 2019

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
148-0034-01	DPDT	15 V 600 Ω	7A12: K7,K12,K15,K18 [note 1]
148-0034-02	DPDT	15 V 600 Ω	7A12: K7 for B020000 up [note 1]
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
148-0063-00	DPDT	15 V 600 Ω	7A12: K5 [note 2]
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

to be expanded

Notes

[note 1] 148-0034-01 and -02 look like 148-0034-00 but with longer leads that are bent outwards. Coil data and pinning is identical.

[note 2] Internally connected. Labled "Alt throw relay" in 7A12 manual.

References

Repairing 7A13 relays @ PA4TIM (how to take relays apart, inside photos)
7A11 repair report at amplifier.cd
Tek 7A13 broken relays @ IK1ZYW Labs

Pictures

148-0034-03 in 7A11
148-0034-xx connections
148-0034-00
148-0034-00
148-0034-02
148-0034-02
148-0034-03 bottom view
148-0035-00 in 7A13
148-0035-00
148-0035-00
148-0035-00
148-0035-00
148-0035-00 connections
148-0050-00
148-0050-00
148-0050-00
148-0050-00
148-0055-00
148-0055-00
148-0055-00
148-0055-00
148-0107-04 TO-5 replacement relay
replacement Omron G6 relay soldered onto Tek socket
Two 148-0058-00 in the 7A11 probe

Other custom relays in Tek equipment

108-0599-00 reed relays in 7T11
Bi-stable relay yoke actuating contacts in 11A33 front-end (148-0204-00)
148-0128-00 relay yoke
11PST reed relay on 262 program cards
11PST reed relay on 262 program cards (top right)
Mag Latch Relay (from 1987 catalog)

7A29 input protection relay

@@ Line 67: / Line 67: @@
 <gallery>
 -0034-03.jpg | 148-0034-03 in [[7A11]]
--0034-03-bot.jpg | 148-0034-03 bottom view
+-0034-00 connections.png | 148-0034-xx connections
 Tek 148-0034-00 701.jpg|148-0034-00
 Tek 148-0034-00 702.jpg|148-0034-00
--0034-00 connections.png | 148-0034-xx connections
+-0034-02-TS.jpg|148-0034-02
+-0034-02-diag.jpg|148-0034-02
+-0034-03-bot.jpg | 148-0034-03 bottom view
 -0035-00.jpg | 148-0035-00 in [[7A13]]
 Tek 148-0035-00 1.jpg|148-0035-00