View source for PS503A

{{TM500 | mfg=Tektronix | type=PS503 | function=triple power supply | class=power supply | image=Tek ps503a.jpg | introduced=1976 | discontinued=1995 |
designers=Gunther Engert;Roger Stenbock
|manuals=
* [[Media:070-1834-01.pdf|Tektronix PS503A Instruction]] (OCR)
* [[Media:061-3171-00.pdf|Tektronix PS503A Mod FF]]
}}
It supplies 0 to −20 V and 0 to +20 V at 1 A, as well as +5 V at 1 A, and was [[introduced in 1976]].

It replaced the earlier [[PS503]] version (1972), adding the capability to deliver ±20 V at 1 A when used in [[TM500 high-power compartments]].

The variable supplies can be adjusted independently or can track one another, and are floating.  The 5 V output is ground referenced.

{{BeginSpecs}}
{{Spec | Output voltage   | 0 to +20 V and 0 to −20 V, floating;  5 V ±5%, ground referenced }}
{{Spec | Current limit    | <100 mA to >1 A variable (0.4 A if used in low power compartment);  1 A fixed on +5 V}}
{{Spec | Ripple and noise | <3 mV<sub>p-p</sub> @ 1 A on either rail }}
{{EndSpecs}}

==Rear Interface==
<small>
* +20 V output (22A)
* −20 V output (22B)
* ±20 V common (24A, 24B)
(connections below require various jumper changes in the PS503 as described in the manual)
* Remote resistor or voltage programming (via 25A, 25B) or 
* Remote sensing (+ Sense 23A, − Sense 23B)
</small>

==Links==
* [https://youtube.com/watch?v=h5ZH7e3sXbo Tektronix PS503A Power Supply Restoration] by NFM @ YouTube
* Tektronix PS503A Power Supply: [https://youtube.com/watch?v=QFdy2mf_5qgm Part 1 (cleanup)] / [https://youtube.com/watch?v=1Q7qj2qEKpQ Part 2 (repair)] by IMSAI Guy @ YouTube
{{Documents|Link=PS503A}}
{{PatentLinks|PS503A}}

==Pictures==
<gallery>
Ps503a-front.jpg          | PS503A Front Panel
Ps503a-left.jpg           | PS503A Left Internal
Ps503a-right.jpg          | PS503A Right Internal
PS503A-rear-sw.jpg        | Switch S95 in rear of PS503A (detects high power compartment)
</gallery>
<gallery>
Tek ps503a.jpg            | PS503A Front Panel
PS503A_Left_Internal.jpg  | PS503A Left Internal
PS503A_Right_Internal.jpg | PS503A Right Internal
Tek ps503a right.jpg      | PS503A Side
PS503A_rear_con.JPG       | PS503A Rear connector
</gallery>

==Components==
{{Parts|PS503A}}


[[Category:TM500 power supply plugins]]