465

From TekWiki
(Redirected from 465B)
Jump to navigation Jump to search
Manuals – Specifications – Links – Pictures
Note: The Tektronix 465M scope has its own page.

The Tektronix 465 is a portable 100 MHz dual-trace oscilloscope with dual time-bases, introduced in November 1972. It is all solid-state except for the CRT. The 465 was very popular and Tek made them for quite a few years. According to microfiche records, 37 variations of the 465 were produced.

There was no 465A but a 465B (int. 1980) with the same base specs but improved performance. The 475 is a 200 MHz sister model. See also 465M.

The optional DM44 multimeter attaches to the top of the instrument.

From Tekscope Vol. 4 No. 5, 1972 :

Initial product planning and project coordination was provided by Leon Orchard. The mechanical design team for the 465 and 475, headed by Bob Rossman, was: Neal Broadbent, Bob Leith, Len McCracken, Bob Smesrud, Ilmars Smiltins, and Bob Twigg. Ken Holland and Bill Mark provided the attenuator design while Bob Johnson designed the P6065 and P6075 probes. Low-voltage power supply for the 465/475 was by George Ermini, and Dennis Braatz designed the high-voltage supply. Connie Wilson and Gary Nelson did the CRT development.

Electrical design team assisting R. Michael Johnson in development of the 465 was: Frank Dewater, Pete Janowitz, Dave Laib, Al Schamel, and Bert tenKate.

Bill Turner worked as a calibration technician for the 465 oscilloscope group.

Key Specifications

Bandwidth DC to 100 MHz on CH1 & CH2 for −15°C to +40°C and DC to 85 MHz from +40°C to +55°C
Risetime 3.5 ns for 0°C to +40°C and 4.2 ns from +40°C to +55°C
Input impedance 1 MΩ ±2% // 20 pF
 Input voltage max. 500 V DC (250 VDC when DC coupled) + Peak AC or 500 Vp-p AC at < 1 kHz
Trigger coupling DC, AC, LF Reject, HF Reject
Channel isolation 100:1 at 25 MHz
Z-Axis input DC to 50 MHz; 5 Vp-p signal causes noticeable modulation at normal intensity
Output signals CH1 Vertical, A & B +Gate
Calibrator ~1 kHz, 300 mV, square wave
CRT T4650 (154-0676-00/154-0676-05/154-0676-10) tube, P31 phosphor, 18.5 kV acceleration, 8 cm × 10 cm graticule
Power 110/115/120/220/230/240 VAC ±10%, selected via primary voltage selector and regulating range selector assembly, 48 Hz to 440 Hz; 75 W

Options

465 Options
Opt Tek catalogue name Description
4 EMI Environmental Adds filter circuits and Faraday mesh+ground contact spring in place of acrylic implosion window.
5 TV Sync Separator This option has a separate service manual.
7 EXT DC Operation DC Power Input. Adds rear socket, power selector switches and inverter module. Not available with DM43 or DM40.
78 P11 Phosphor Replaces P31 phosphor 154-0676-10 with P11 version 154-0676-14.

Links

Documents Referencing 465

Document Class Title Authors Year Links
Tekscope 1972 V4 N5 Sep 1972.pdf Article The New Look in Portables 1972
Tekscope 1974 V6 N1.pdf Article Servicing the 465 Portable Oscilloscope 1974
Tekscope 1974 V6 N4.pdf Article The Oscilloscope with the Digital Multimeter Dennis Bratz 1974
Tekscope 1975 V7 N3.pdf Article A Potpourri of Modifications and Service Hints 1975

Documents Referencing 465B

Document Class Title Authors Year Links
Tekscope 1979 V11 N2.pdf Article Updating the Industry-Standard 100 MHz Portable Oscilloscope Harold Busch 1979

Prices

Year 1973 1976 1980 (B) 1982 (B) 1983
Catalog Price $1,725 $2,095 $2,600 $2,995
In 2023 Dollars $12,000 $11,300 $9,700 $9,600

Internals

The 465 uses tunnel diodes with Tek part number 152-0125-00, which are equivalent to TD3A, and 155-0032-00 chips (their -01 grade) as trigger amplifiers.

Common Problems

Pictures

465

465 OPT 4

465 OPT 7

465 Mod UC

465B

Components

Some Parts Used in the 465

Part Part Number(s) Class Description Used in
154-0731-00 154-0731-00 CRT CRT Telequipment D75 455 465 465B 468
154-0731-04 154-0731-04 CRT CRT 465 465B
155-0032-00 155-0032-00 155-0032-01 Monolithic integrated circuit variable-gain transconductance amplifier 335 464 465 465B 466 475 475A 475M 634 650 651 652 653 655 656 670 671 7A12 475 FG504 1440 1460 1480 1481 1482 1485
155-0049-00 155-0049-00 155-0049-01 155-0049-02 Monolithic integrated circuit sweep control with lockout 335 464 465 466 475 475A 475M 485 5B31 5B40 5B52 5B42 5B44 7B53A 7B80 7B85 7B87 7B92A 7B90P 7B10 7B15 SC502 7B42N AN/USM-281C 067-0657-00
155-0076-00 155-0076-00 Monolithic integrated circuit input protection and probe logic 465 485 7A29 7A29P 11A52 11A71 11A72 SCD1000
155-0077-00 155-0077-00 155-0077-01 Hybrid integrated circuit vertical output amplifier 335 464 465 466 7704A
155-0078-00 155-0078-xx 155-0273-00 155-0274-00 Monolithic integrated circuit broadband amplifier 464 465 466 468 475 475A 475M 485 7834 7844 7854 7904 R7903 R7912 7912AD 7912HB 7104 7A16A 7A16P 7A24 7A26 7A42 067-0587-01 067-0680-00 AM503 PG502 PG508 DC510 DC5010 FG5010
155-0115-00 155-0115-00 Hybrid integrated circuit vertical amplifier 335 464 465 465B 466 468
SKA6516 151-0367-00 Discrete component NPN Transistor 465 465B 466 475
STD704 152-0125-00 Discrete component 4.7 mA tunnel diode 1L40 1S1 11B1 11B2 11B2A 147 R147 147A R147A 1470 148 R148 148-M 149 R149 149A R149A 21A 22A 3B4 3B5 408 432 434 453 453A 454 464 465 466 491 5T3 544 RM544 546 RM546 547 RM547 556 RM556 7B70 7B71 7D11
T4650 154-0676-00 154-0676-05 154-0676-10 154-0676-14 CRT CRT 465 Telequipment D75 Telequipment D755


Some Parts Used in the 465B

Part Part Number(s) Class Description Used in
154-0731-00 154-0731-00 CRT CRT Telequipment D75 455 465 465B 468
154-0731-04 154-0731-04 CRT CRT 465 465B
155-0032-00 155-0032-00 155-0032-01 Monolithic integrated circuit variable-gain transconductance amplifier 335 464 465 465B 466 475 475A 475M 634 650 651 652 653 655 656 670 671 7A12 475 FG504 1440 1460 1480 1481 1482 1485
155-0115-00 155-0115-00 Hybrid integrated circuit vertical amplifier 335 464 465 465B 466 468
SKA6516 151-0367-00 Discrete component NPN Transistor 465 465B 466 475