525

Manuals – Specifications – Links – Pictures

The Tektronix 525 was the first Tek instrument described as a Waveform Monitor, a special-purpose oscilloscope for viewing television waveforms. (The 524AD, 1953, was still called an oscilloscope.)

Designed by Cliff Moulton, it first appeared in the spring 1955 short-form catalog.

A 525MOD111 was available "with intensifier for observation of vertical-blanking-interval test signal."

Key Specifications

Bandwidth	Flat: 60 Hz to 5 MHz (±1%); IRE: 1.8 MHz (–3 dB); Low pass: 1 MHz (–3 dB); High pass: 2.7 MHz to 5.2 MHz (–3 dB)
Deflection	15 mV/div, 1× / 2× / 5× attenuator
Input	75 Ω; max. 600 V (DC + peak AC)
Sweep	2672–7875 Hz line-synced, 10–30 Hz field-synced; ×5/×25 magnifier
Trigger	1 div (int) or 0.5 V square (ext)
CRT	T52P1 standard, P2 / P7 / P11 optional; 4.2 kV acceleration
Power	102–125 V or 210–250 V, 50–60 Hz, 380 W

Links

• https://vintagetek.org/television-products/

Prices

Year	Catalog price	In 2026 dollars
1955	$1,050	~$12,700
1957	$1,050	~$12,200
1959	$1,100	~$12,300
1961	$1,100	~$12,000
1964	$1,400	~$14,700

Pictures

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  525 in 1959 catalog

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Parts

Some Parts Used in the 525