Miniature relays: Difference between revisions
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148-0140-00 frame.jpg | Three 148-0140-00 in a frame | 148-0140-00 frame.jpg | Three 148-0140-00 in a frame | ||
119-1445-02.jpg | 148-0140-00s in [[119-1445-02]] attenuator (2400 series) | 119-1445-02.jpg | 148-0140-00s in [[119-1445-02]] attenuator (2400 series) | ||
148-0140-00 in 2424L attenuator.jpg | 148-0140-00s in attenuator | |||
Tek_148-0129-01_1.jpeg | 148-0129-01 | Tek_148-0129-01_1.jpeg | 148-0129-01 | ||
Tek_148-0129-01_2.jpeg | 148-0129-01 in [[485]] attenuator | Tek_148-0129-01_2.jpeg | 148-0129-01 in [[485]] attenuator | ||
Revision as of 02:19, 28 September 2022
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 working ones have become very rare. Some of these relays have symmetrical socket layouts so that they can be installed in both possible 180° rotated positions.
Interestingly, Tek appears 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.
Possible repair strategies include "micro-surgery" (Ref.1), installing modern miniature gold-contact relays on top of the cut-off base or, if energizing the coil mechanically operates the relay, using a signal source to cycle the relay for a period of time.
Relays of the 148-0034-00 family have contacts with 100mil (2.54 mm) pitch; the housings are 16.0 x 8.3 x 15 mm (width x depths x height).
| Tek P/N | Contacts | Coil | Used in | Replacement | Note |
|---|---|---|---|---|---|
| 108-0599-00 | SPST (reed) | 7T11: A3K31,A3K32,A3K70,A3K71,A3K80 | |||
| 148-0034-00 | DPDT | 15 V 600 Ω |
7A11: K401, K403, K405, K407, K411, K413, K415, K417, K431 |
AXICOM V23079-D2003-B301 (Ref. 2) Omron G6N, G6S |
|
| 148-0034-01 | DPDT | 15 V 600 Ω | Same pinout as 148-0034-00 but longer leads bent outwards. | ||
| 148-0034-02 | DPDT | 15 V 600 Ω | 7A12: K7 for B020000 up | Same pinout as 148-0034-00 but longer leads bent outwards. | |
| 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, K155, K160, K180, K235, K280 7B70, 7B71: K3 |
Same pinout and coil data as 148-0050-00. | |
| 148-0043-00 | DPDT | 24 V 1325 Ω | |||
| 148-0043-01 | DPDT | 24 V 1325 Ω | |||
| 148-0044-00 | DPDT | 12 V 425 Ω | |||
| 148-0050-00 | SPDT | 15 V 600 Ω | 7A13: K10, K30 | 7A13 manual erroneously calls them 12V DC relays. Print on relay identifies them as polarized, but they are not. | |
| 148-0054-00 | SPDT+SPST | 15 V 600 Ω | 7A13: K7, K27 | ||
| 148-0055-00 | SPDT+SPST | 15 V 600 Ω | 7A13: K6, K26 | ||
| 148-0058-00 | 4 V 130 Ω | 7A11 Probe: K55, K59 | |||
| 148-0059-00 | DPDT | 9.5 V 115 Ω | |||
| 148-0063-00 | DPDT | 15 V 600 Ω | 7A12: K5 | Internally connected. Labled "Alt throw relay" in 7A12 manual. | |
| 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 | 15 V 1 kΩ |
7L12: K281, K354, K355, K357, K1130, K1400, K1450 |
Same pinout as 148-0034-00. 7L12 manual claims "120 mW", but print on relay (and measurement) says 15V 1000 Ω which is 225 mW. | |
| 148-0107 | DPDT | 18 V 880 Ω | TO5 replacement for 148-0088-00 | Based on Hi-G MAW-169 7815 / Teledyne 412-6841, found in L1. The last two digits of the Tek part number are missing. Coil labeled 18V dc, 880 Ω | |
| 148-0107-03 | SPDT | TO5 replacement | |||
| 148-0107-04 | DPDT | TO5 replacement for 148-0054-00 (7A13: K7, K27) | |||
| 148-0140-00 | Actuator | 2400 series |
to be expanded
Links
- Patent US 3519966A
- Repairing 7A13 relays @ PA4TIM (how to take relays apart, inside photos)
- 7A11 repair report at amplifier.cd
- Tek 7A13 broken relays @ IK1ZYW Labs
- "... used a function generator to actuate it for a few hours which restored proper operation."
- 1989 Electro-Mechanical Catalog (OCR)
Pictures
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148-0034-03 in 7A11
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148-0034-xx connections (bottom view)
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148-0034-00
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148-0034-00
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148-0034-02
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148-0034-02
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148-0034-03 bottom view
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148-0035-00 in 7A13
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148-0035-00
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148-0035-00
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148-0035-00
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148-0035-00
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148-0035-00 connections
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148-0050-00
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148-0050-00
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148-0050-00
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148-0050-00
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148-0035-00 vs. 148-0050-00
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148-0054-00
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148-0054-00
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148-0055-00
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148-0055-00
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148-0055-00
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148-0055-00
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148-0054-00 vs. 148-0055-00
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148-0107 TO-5 replacement relay
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148-0107 TO-5 replacement relay
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148-0107 TO-5 replacement relay
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148-0107 TO-5 replacement relay
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148-0107-04 TO-5 replacement relay
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replacement Omron G6 relay soldered onto Tek socket
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Two 148-0058-00 in the 7A11 probe
Other custom relays in Tek equipment
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108-0599-00 reed relays in 7T11
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Bi-stable relay yoke actuating contacts in 11A33 front-end (148-0204-00)
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148-0128-00 relay yoke
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11PST reed relay on 262 program cards
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11PST reed relay on 262 program cards (top right)
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Mag Latch Relay (from 1987 catalog)
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148-0140-00
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Three 148-0140-00 in a frame
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148-0140-00s in 119-1445-02 attenuator (2400 series)
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148-0140-00s in attenuator
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148-0129-01
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148-0129-01 in 485 attenuator
- 7A29 input protection relay