PS503

Manuals – Specifications – Links – Pictures

The Tektronix PS503 is a triple power supply plug-in for the TM500 system.

It supplies 0 to −20 V and 0 to +20 V at 0.4 A as well as +5 V at 1 A, and was introduced in 1972.

The PS503A version (introduced in 1976) delivers ±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.

The PS503 was designed by Gunther Engert and Roger Stenbock.

Key Specifications

Output voltage	0 to +20 V and 0 to −20 V, floating; 5 V ±5%, ground referenced
Current limit	<100 mA to >1 A variable (0.4 A for original PS503 or if used in low power compartment); 1 A fixed on +5 V
Ripple and noise	<3 mVp-p @ 1 A on either rail

Rear interface connections

• +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)

Links

• Tektronix PS503A Power Supply Restoration by NFM @ YouTube
• Tektronix PS503A Power Supply: Part 1 (cleanup) / Part 2 (repair) by IMSAI Guy @ YouTube

Prices

Year	1975
Catalog Price	$195
In 2023 Dollars	$1,100

Pictures

PS503

• 

  PS503 Front Panel

• 

  PS503 Left Internal

• 

  PS503 Right Internal

• 

  PS501-2, PS502, and PS503

PS503M

• 

  PS503M Front Panel

• 

  PS503M Left Internal

• 

  PS503M Right Internal

PS503A

• 

  PS503A Front Panel

• 

  PS503A Left Internal

• 

  PS503A Right Internal

• 

  Switch S95 in rear of PS503A (detects high power compartment)

• 

  PS503A Front Panel

• 

  PS503A Left Internal

• 

  PS503A Right Internal

• 

  PS503A Side

• 

  PS503A Rear connector

Components

Some Parts Used in the PS503

(no results)