TM503
The Tektronix TM503 (503A) is a 3-bay mainframe for the TM500 system.
![](http://w140.com/tekwiki/images/thumb/3/34/Tek_pg501_sc502.jpg/300px-Tek_pg501_sc502.jpg)
The TM503B variant has a swivelling carrying handle, and the power supply/backplane part can be removed from the case, allowing TM500 modules to be repaired on the bench without using extenders (see link below).
Manuals
Key Specifications
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Links
Pictures
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TM503 inside
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TM503 backplane
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TM503 PSU
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