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.

Tektronix 360
CRT Indicator Unit
Tektronix 360 front view

Produced from 1954 to 1973

Manuals

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

Components

Some Parts Used in the 360

Part Part Number(s) Class Description Used in
12AT7 154-0039-00 Vacuum Tube (Dual Triode) dual high-gain triode 161 180 310 310A 315 316 360 502 502A 511A 512 513 513D 514 514AD 514D 516 524 529 RM529 544 546 547 556 565 570 3A2 75 3A75 1M1 A B C G H K L ML M N K R S Z
3WP 154-0059-00 CRT series of flat-faced 3" mono-accelerator CRTs 315 310 360 Telequipment S31
5642 154-0051-00 154-0079-00 Vacuum Tube (Diode) directly-heated high-voltage rectifier 310 310A 316 317 360 453 502 502A 503 504 506 513 515 516 524 529 RM529 533 533A 535 536 543 543A 543B 545 545A 545B 547 551 555 556 560 561 561A 561S 564 567 570 575 581 581A 585 585A 647 647A
6AN8 154-078 154-0078-00 Vacuum Tube (Triode/Pentode) triode-pentode combo 310 310A 316 317 360 502 502A 516 517 517A 526 565 570 575 N
6AQ5 154-017 154-0017-00 Vacuum Tube (Pentode) beam pentode 310 310A 316 360 507 511A 512 517 517A 524 536 570 575
6AU6 154-0022-00 157-0073-00 157-0059-00 154-0284-00 Vacuum Tube (Pentode) RF pentode 107 160 181 190 60 2A60 72 3A72 3C66 310 310A 316 317 360 502 502A 506 511 511A 512 513 516 517 517A 524 526 529 RM529 531 531A 535 536 545 545A 546 547 549 555 561 561A 561S 564 565 567 570 575 581 581A 585 585A 80 C CA Q
6BQ7A 154-028 154-0028-00 157-0022-00 157-0003-00 Vacuum Tube (Dual Triode) dual triode 107 163 181 310 315 316 360 524 531 532 535 536 541 545 570 T
6EW6 154-0212-00 Vacuum Tube (Pentode) pentode 132 360 51 527 581 581A 585 585A 3T77 3T77A
T3100 154-0362-00 154-0363-00 154-0364-00 154-0365-00 154-0366-00 154-0058-01 154-0059-01 154-0060-01 154-0061-01 CRT 3" CRT 310 310A 315 360