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, 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 TO-5 relays on small carrier boards
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 relays on top of the cut-off base.
|Tek P/N||Contacts||Coil||Used in||Replacement|
|148-0034-00||DPDT||15 V 600 Ω||7A13: K47,K48,K480,K490||Omron G6N, G6S|
|148-0034-00||DPDT||15 V 600 Ω||7A11: K401,K403,K405,K407,K411,K413,K415,K417,K431||AXICOM V23079-D2003-B301 (Ref. 2)|
|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||15 V 600 Ω||7A13: K60,K61|
|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||7A13 Probe: K55,K59|
|148-0107-04||DPDT||TO5 replacement for 148-0055-00 (7A13: K6,K26)|
to be expanded
- Repairing 7A13 relays @ PA4TIM (how to take relays apart, inside photos)
- 7A11 repair report at amplifier.cd
- Tek 7A13 broken relays @ IK1ZYW Labs