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==Repair issues== | ==Repair issues== | ||
===Attenuator solder joints=== | |||
The pins of the attenuator modules are connected to conductive traces on the ceramic substrate inside by low-temperature soldering, which can go bad. | The pins of the attenuator modules are connected to conductive traces on the ceramic substrate inside by low-temperature soldering, which can go bad. | ||
Re-seating the module can temporarily restore the internal contact but will usually not fix the problem permanently. | Re-seating the module can temporarily restore the internal contact but will usually not fix the problem permanently. | ||
Repair is possible by opening the click-locked lid and carefully resoldering. | Repair is possible by opening the click-locked lid and carefully resoldering. | ||
===Variable gain pots=== | |||
These pots (R237A,B and R437A,B 315-0241-00) are bonded together - looking at a few 7A18s, I see that the design was changed at least once. | |||
==Pictures== | ==Pictures== | ||
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7A18 and 7A18N from 070-1126-01.png | 7A18 and 7A18N from service manual 070-1126-01 | 7A18 and 7A18N from 070-1126-01.png | 7A18 and 7A18N from service manual 070-1126-01 | ||
Tek 7a18n.jpeg | 7A18N with "Identify" Kurt to check? | Tek 7a18n.jpeg | 7A18N with "Identify" Kurt to check? | ||
7A18N front.jpg | 7A18N Front | |||
7A18N RHS.jpg | 7A18N RHS switch cover removed | |||
7A18N LHS.jpg | 7A18N LHS switch cover removed | |||
</gallery> | </gallery> | ||
===Development Prototypes=== | ===Development Prototypes=== |
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