TEKTRONIX Plug-in CA Dual Trace, Pre-Amp. Calibrated. .05 - 20 V/CM. DC coupled. .01 V. Sec. Tubes are (4) 12AT7, 6AL5, (4) 12AV6, (4) 12AU6, (2) 6AK5. 10 pounds shippimg weight.
====================================
This is a two channel all-tube plugin which is interesting, because when the 533A is equipped with it, there is not a single transistor left in the whole machine. It is not interesting because it is a very good amplifier, because it isn't. Though usable, it suffers from extensive DC drift while warming up, and unfortunately, the input selector switches do not have a "GND" position, so there is no quick way to reset the trace to the middle of the graticule, short of disconnecting the probe, which is a drag.
-------------------------------------------------------
CHARACTERISTICS
GENERAL
The Type CA Unit contains two identical amplifier channels that can be electronically switched either by the oscilloscope sweep or at a free-running rate of approximately 100 kc. When amplifier switching is accomplished by the oscilloscope sweep, the two signals to be compared appear on alternate sweeps. Because the sweeps are identical, and time-delay characteristics of the two amplifier channels are closely controlled, time comparisons accurate within 1 nsec can be made.
AMPLIFIER TRANSIENT RESPONSE
| Risetime | Passband |
|---|
| With Instrument Type | INPUT SELECTRO switch in any position |
INPUT SELECTOR switch in either DC position | INPUT SELECTOR switch in either AC position |
541/541A,
545/545A,
555,581,585 | 15 nsec | DC to 24 Mc | 2cps to 24 Mc
0.2 cps to 22 Mc
with P6000 or P6017 Probe |
| 551 | 16 nsec | DC to 22 Mc | 2cps to 22 Mc
0.2 cps to 22 Mc
with P6000 or P6017 Probe |
531/531A,
533/533A,
535/535A | 23 nsec | DC to 15 Mc | 2cps to 10 Mc
0.2 cps to 10 Mc
with P6000 or P6017 Probe |
| 536 | 35 nsec | DC to 10 Mc | 2cps to 10 Mc
0.2 cps to 5 Mc
with P6000 or P6017 Probe |
| 532 | 70 nsec | DC to 5 Mc | 2cps to 10 Mc
0.2 cps to 5 Mc
with P6000 or P6017 Probe |
Either amplifier channel can be used separately without electronic switching, making the Type CA also useful in all single-trace applications withing its frequency-response and sensitivity capabilities. Maximum flexibility is obtained by providing separate positioning, sensitivity, and polarity-inverting controls for each channel.
Operating Modes
Channel A only
Channel B only
CHOPPED (Electronic switching at 100 kc.)
ALTERNATE (Electronic switching on alternate sweeps.)
ADDED ALGEBRAICALLY (Both channels combined at output (A +or- B)
Amplifier Sensitivity
Basic deflection factor -- 0.05 v/cm, ac or dc.
Nine calibrated sensitivities -- 0.05 v/cm to 20 v/cm, accurate within 3% when set on any one step.
Input Impedance
Plug-In alone 1 megohm shunted by 20 pf.
10 megohms at 14 pf with P6000 or P6017 probe.
P410 probe with plug-in will be 10 megohms at 7.5 pf.
Physical Characteristics
Construction -- Aluminum alloy chassis.
Finish -- Photo-etched anodized panel.
Weight -- 4 1/2 lbs.
Above excerpt from Textronix CA Type Plug-In Instruction Manual
| Knobs |
| 366-029 | Knob, Large Black, 1/4 Hole Thru (Volts/CM) |
| 366-031 | Knob, Small Red, 1/8 Hole Part Way (Variable) |
| 366-047 | Knob, Small Black, 1/8 Hole Part Way (Polarity) |
| 366-033 | Knob, Small Black, 1/4 Hole Part Way (Vertical Position) |
| 366-033 | Knob, Small Black, 1/4 Hole Part Way (A,B,ALT,Chopped,Add) |
| Pots/Switches |
| R3338 / R4338 | 311-279 | 770 Ohm WW (Variable) |
| R3361 / R4361 | 311-028 | 2 x 100K 2W Var. (Vertical Position) |
| Tubes |
| V3323 | 154-014 | 6AK5 |
| V3334 | 154-040 | 12AU6 |
| V3354 | 154-040 | 12AU6 |
| V3364 | *157-059 | 6AU6 selected pair |
| V3374 | *157-059 | 6AU6 selected pair |
| V3375 | 154-039 | 12AT7 |
| V3382 | 154-016 | 6AL5 |
| V3384 | 154-039 | 12AT7 |
| V3393 | 154-039 | 12AT7 |
| V4323 | 154-014 | 6AK5 |
| V4334 | 154-040 | 12AU6 |
| V4354 | 154-040 | 12AU6 |
| V4364 | *157-059 | 6AU6 selected pair |
| V4374 | *157-059 | 6AU6 selected pair |
| V4383 | 154-039 | 12AT7 |
|
