C
- Actually, there never was a Type C, but that name is sometimes used as shorthand for the official "Type 53C" and "Type 53/54C" nomenclatures.
The Tektronix Type 53C is a dual-trace plug-in for 500-series scopes. It was introduced along with the 531 and 535 mainframes in 1954. It is very possibly the first dual-trace scope or plugin ever.
Specifications
In the 53x scopes (Tek never documented its performance in the 540's), its bandwidth is 8.5 MHz, and like most letter-series plug-ins, its maximum vertical sensitivity is 50 mV/div. Unlike the Type A and Type B, the Type C had the ability to invert the signal before display.
Type 53C was replaced by Type 53/54C in 1956 when the 541 and 545 were introduced. The Type 53/54C's bandwidth is 24 MHz in those scopes. In 1959 it was replaced by Type CA.
Internals
At 15 tubes, the Type 53/54C and Type CA have the highest tube count of any letter-series plug-in. Each channel consists of a 6AK5 cathode-follower driving a 12AU6 differential pair which drives a 6AU6 differential pair. The two channels converge on a 12AT7 cross-coupled cathode-follower. Four more tubes, a 6AL5 and three 12AT7's, comprise a logic circuit which determines which channel drives the output at any given moment. The options are A, B, CHOPPED, and ALT.
Links
Pictures
53C-Plugin´s Front
53C-Plugin´s chassis
53C-Plugin´s chassis side
53/54C-Plugin´s front
53/54C-Plugin´s chassis
53/54C-Plugin´s chassis bottom
Schematic diagram
53/54C
53/54C
53/54C
53/54C
53/54C
53/54C
53/54C
53/54C
Some Parts Used in the C
| Page | Class | Description | Used in |
|---|---|---|---|
| 12AT7 | 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 • 3A2 • 3A75 • 1M1 • A • B • C • G • H • K • L • M • N • K • R • S • Z |
| 12AU6 | Vacuum Tube (Pentode) | RF pentode | 81 • 112 • 512 • 556 • 575 • 545 • 549 • 581 • 585 • A • B • C • G • K • H • L • M • N • O • R • S • Z |
| 12AU7 | Vacuum Tube (Dual Triode) | dual medium-μ triode | 104 • 104A • 122 • 160 • 161 • 162 • 181 • 190 • 310 • 316 • 317 • 502 • 502A • 511A • 512 • 516 • 517 • 517A • 524 • 526 • 535 • 536 • 545 • 545A • 545B • 547 • 549 • 555 • 575 • 581 • 581A • 585 • 585A • C • D • E • N • Q |
| 6AK5 | Vacuum Tube (Pentode) | RF pentode | B • C • CA • G • K • L • S • Z • 517 • 517A • 524 |
| 6AL5 | Vacuum Tube (Dual Diode) | high-perveance dual diode | 163 • 181 • 190 • 1M1 • 310 • 310A • 315 • 316 • 317 • 502 • 502A • 503 • 511 • 511A • 512 • 516 • 517 • 517A • 524 • 526 • 535 • 535A • 545 • 545A • 549 • 581 • 581A • 585 • 585A • 551 • C • T • Telequipment S52 |
| 6AU6 | Vacuum Tube (Pentode) | RF pentode | 2A60 • 80 • 107 • 160 • 181 • 190 • 310 • 310A • 316 • 317 • 360 • 502 • 502A • 511A • 512 • 513 • 516 • 517 • 517A • 524 • 526 • 529 • RM529 • 531 • 531A • 535 • 536 • 545 • 545A • 546 • 547 • 549 • 555 • 575 • 581 • 581A • 585 • 585A • C • CA • Q |