360

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Tektronix 360
CRT Indicator Unit
Tektronix 360 front view

Produced from 1954 to 1973

Manuals
Manuals – Specifications – Links – Pictures

The Tektronix Type 360 is the "indicator unit" of the 160 series modular scope system. It contains a 3WP CRT (T3100 for SN > 25767), vertical amplifier, horizontal amplifier, and HV CRT circuit. It does not contain the low-voltage power supply, which is a separate component in the 160 system.

Internals

Vertical Signal Path

The vertical signal path starts with a switched compensated attenuator, followed by a 6AU6 differential amplifier stage, followed by a second 6AU6 differential stage.

Horizontal Signal Path

The horizontal amplifier uses a 6AN8 common-cathode gain stage followed by a 6AU6 common-cathode amplifier as a phase splitter to differentially drive the CRT horizontal deflection plates.

CRT Circuit

The CRT circuit in the Type 360 uses a 6AQ5-based power oscillator to drive two 5642 high-voltage rectifier tubes, one for the CRT grid voltage, and one for the CRT cathode voltage. The high-voltage regulator feedback amplifier is made from two cascaded common-cathode amplifiers, each made from one half of a 12AT7 dual triode.A high voltage isolation transformer (1:1) is used to power the CRT filament from the main 6.3V heater line.


Mechanical

Open-frame construction allows the 360 to operate without fan cooling. 360s with SN < 1000 were made using printed circuit boards, later SN are made using the ceramic wiring strip style that is more typical of the 1950s and 1960s Tektronix construction.

Pictures


Some Parts Used in the 360

Page Class Description Used in
12AT7 Vacuum Tube (Dual Triode) dual high-gain triode 161 180 310 310A 315 316 360 502 502A 512 513 513D 514 514AD 514D 516 524AD 529 RM529 544 546 547 556 3A2 3A75 1M1 A B C G H K L M N K R S Z
3WP CRT series of flat-faced 3" mono-accelerator CRTs 315 310 360 Telequipment S31
5642 Vacuum Tube (Diode) directly-heated high-voltage rectifier 310 310A 316 317 360 453 502 502A 503 504 506 513 515 516 529 RM529 533 533A 535 536 543 543A 543B 545 545A 545B 547 551 555 556 567 575 581 581A 585 585A 647
6AN8 Vacuum Tube (Triode/Pentode) triode-pentode combo 310 310A 316 317 360 502 502A 516 517 517A 526 575 N
6AQ5 Vacuum Tube (Pentode) beam pentode 310 310A 316 360 512 517 517A 536 575
6AU6 Vacuum Tube (Pentode) RF pentode 2A60 80 107 160 181 190 310 310A 316 317 360 502 502A 512 513 516 517 517A 526 529 RM529 531 531A 535 536 545 545A 546 547 549 555 575 581 581A 585 585A C CA Q
6BQ7A Vacuum Tube (Dual Triode) dual triode 107 163 310 316 360 181 315 524 531 532 535 536 541 545 T
6EW6 Vacuum Tube (Pentode) pentode 132 360 527 581 581A 585 585A
T3100 CRT 3" CRT 310 310A 315 360