7623

Tektronix 7623

100 MHz multi-mode storage scope

Produced from 1972 to 1992

Manuals

7623

Tektronix 7623 Service Manual 070-1366-00

7623A

Needed: Tektronix 7623A Service Manual, Revised 1984 please add

7623B

Manuals needed, please add

Alternate copies

N.B. For more info on the Low-Voltage Power Supply, see Manuals in the 7603 section.

Modifications

(Manuals are OCRed PDF files unless noted otherwise)

Manuals – Specifications – Links – Pictures

The Tektronix 7623 is a 100 MHz analog multi-mode storage mainframe, introduced in 1972.
The 7623A facelift in 1975 increased standard writing speed to 150 div/µs (from 100 div/µs for a 7623 without option 12). Front panel controls were changed in the 7623A, too.
The 7623B version replaced the 7613, 7623A and 7633 in 1991. It added a reduced scan mode to increase stored writing speed and is essentially a re-named 7633. It was produced until the entire 7000 series was discontinued in 1992.

There were also R7623(A,B) rack-mount versions.

Project Engineer for the 7613 and 7623 was Bill DeVey under direction of Oliver Dalton. John Durecka did the electrical design. Doug Giesbers, Ed Wolf, and Chuck Davis provided the mechanical design. The CRT for the 7623 was developed by Gary Siewell, Chris Curtin, and Wes Hayward. Aiding the overall design effort were Dave McCullough and Dick Anderson.

Key Specifications

	— Common —
Fastest cal. sweep	5 ns/div
Bandwidth	100 MHz with 7A11, 7A16, 7A17 and similar amplifiers; 75 MHz with 7A13, 7A18
Calibrator	40 mV, 400 mV or 4 V into 1 MΩ, 1 kHz
Storage modes	variable persistence, fast variable persistence, bistable, fast bistable, non-store
Weight	13.6 kg (30 lb)
Power	170 W (R-version 180 W)
	— 7623 —
Stored writing speed	fast var persist – 100 Div/μs, var persist - 0.5 Div/μs, bistable - 0.03 Div/μs
CRT	T7410 (154-0659-00), 8 x 10 Div. @ 0.9 cm, P31 phosphor, 8.5 (−1.5/+7) kV acceleration
	— 7623A —
Stored writing speed	fast var persist – 150 Div/μs, fast bistable - 50 Div/μs, var persist - 0.5 Div/μs, bistable - 0.03 Div/μs
CRT	T7411 (154-0723-00), 8 x 10 Div. @ 0.9 cm, P31 phosphor, 8.5 (−1.5/+7) kV acceleration
	— 7623B —
Bandwidth	tba
Stored writing speed	1000 cm/μs (in reduced-scan mode)

Options

Option 01 - No Readout
Option 03 - EMI modification
Option 05 - Line frequency change (50-400 Hz), only for R7623
Option 07 - No signals out board
Option 08 - Protective panel cover
Option 12 - Fast Writing CRT (200 cm/µs, 220 Div/µs)}}

Links

Documents Referencing 7623

Document	Class	Title	Authors	Year	Links
Tekscope 1972 V4 N4 Jul 1972.pdf	Article	Three Kinds of Storage		1972	7313 • 7613 • 7623 • T7411 • Direct-view storage CRT • Transfer storage CRT
7000 series brochure March 1973.pdf	Brochure	7000 series brochure, March 1973		1973	7A11 • 7A12 • 7A13 • 7A14 • 7A15A • 7A16A • 7A17 • 7A18 • 7A19 • 7A21N • 7A22 • 7B50 • 7B53A • 7B70 • 7B71 • 7B92 • 7CT1N • 7D11 • 7D13 • 7D14 • 7D15 • 7M11 • 7L12 • 7S11 • 7S12 • 7T11 • 7704A • R7704 • 7904 • R7903 • 7603 • R7603 • 7403N • R7403N • 7313 • R7313 • 7613 • R7613 • 7623 • R7623 • P7001
Tekscope 1975 V7 N3.pdf	Article	Storage Expands Your Oscilloscope Measurement Capabilities	Dave McCullough	1975	7514 • 7313 • 7613 • 7623 • 7633
Tekscope 1976 V8 N3.pdf	Article	Clearing Up the 7623 Storage Picture		1976	7623

Internals

The 7623 uses a Transfer storage CRT which includes an internal, fast-responding storage mesh. In fast mode, the time base is inhibited after a sweep, and the transfer cycle is started. Individual sweeps therefore occur in about one-second intervals.

The vertical output amplifier is built around a 155-0080-00 hybrid in the non-A version. The 7623A vertical amplifier is a discrete design with bridged T-coils. Other custom Tek ICs used in the 7623 include 155-0011-00 clock & chop blanking, 155-0022-00 channel switch, and the 7000 series readout system chips.

The 7623, like the other 76xx models, has a linear supply which does not provide +5 V for lights (A9) without modification.

Prices

Year	Catalog price	In 2026 dollars
1972	$2,850	~$22,200
1973	$2,850	~$20,900
1974	$3,000	~$19,800
1976	$3,500	~$20,000
1980	$4,295	~$17,000
1984	$6,310	~$19,800
1990	$8,900	~$22,100
1991	$12,350	~$29,500

1972-1973 = 7623, 1974–1990 = 7623A, 1991 = 7623B

Pictures