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{{Plugin Sidebar | |||
|manufacturer=Tektronix | |||
|series=500-series scopes | |||
|type=1A1 | |||
|summary=50 MHz dual channel amplifier | |||
|image=Tek 1A1 front.jpg | |||
|caption=1A1 front view | |||
|introduced=1964 | |||
|discontinued=1975 | |||
|designers=Ron Olson | |||
|manuals= | |||
* [[Media:070-378.pdf|Tektronix 1A1 Manual (early)]] (bad-OCR) | |||
* [[Media:070-0885-00.pdf|Tektronix 1A1 Manual (late)]] (bad-OCR) | |||
* [[Media:tek_1a1_field_cal_proc.pdf|Tektronix 1A1 Field Recalibration Procedure]] (OCR) | |||
* [[Media:tek_1a1_sn20000up_german_short_version.pdf|Tektronix 1A1 Manual SN20000-up German Short Version]] (bad-OCR) | |||
* [[Media:Tek type 1a1 cal outline.pdf|Tektronix 1A1 Calibration Outline]] (OCR) | |||
* [[Media:Tek 1A1 FET mod.pdf|Modification to replace nuvistors with FETs]] | |||
Types 1A1 and [[1A2]] were introduced together in 1964, the former for high-end use, | <!-- | ||
the latter as an upgrade/replacement for | * [https://w140.com/mmm/tek-1a1-early.pdf Tektronix 1A1 Manual (early)] | ||
the | * [https://w140.com/mmm/tek-1a1-late.pdf Tektronix 1A1 Manual (late)] | ||
* [http://w140.com/tek_fcp/tek_type_1a1_factory_cal_proc.pdf Tektronix 1A1 Field Recalibration Procedure] | |||
* [https://w140.com/Tektronix_1A1_SN20000up_german_short_version_300dpi.pdf Tektronix 1A1 Manual SN20000-up German Short Version] | |||
--> | |||
}} | |||
The '''Tektronix Type 1A1''' plug-in for the [[500-series scopes]] has two channels and a −3 dB point of 50 MHz at 50 mV/Div, 28 MHz at 5 mV/Div, | |||
and 2 Hz to 15 MHz at 500 μV/Div when channels 1 and 2 are cascaded. It was designed by [[Ron Olson]]. | |||
There were three distinct versions of 1A1. | |||
* The first version, from 1964 to 1966, has a [[Nuvistor]] front-end, and [[rotary_input_switch|rotary input switches]] that were concentric with the [[BNC]] jacks. The knobs to invert the input channels are concentric with the vertical position knobs. | |||
* The second version, from 1966 to ??? has fluted round V/cm knobs, and lever switches. The channel inversion control is an organ-style pull-push knob. The nuvistors are mounted under a thermal cover on a sub-chassis with rubber stand-offs. | |||
* The third model, from ??? until the end has four-sided V/cm knobs and a FET front-end. | |||
Type 1A1 uses the [[500_Series_plug-in_interface|"ALT SWEEP SLAVE PULSE" signal]] that is sent by scopes on pin 7 of the plug-in connector. | |||
In a Type [[547]] mainframe, this signal allows channel 1 to be displayed using the "A" timebase and channel 2 using the "B" timebase. | |||
This is useful, for example, to view the IF and AF of a radio receiver at the same time. | |||
Even after the front-end transitioned from Nuvistors to FETs, the output amplifier continued to use Nuvistors. | |||
Type 1A1 has an External Trigger output for mainframes prior to the [[547]] that don't support plug-in triggering, and supplies the trigger system on [[500 Series plug-in interface|pins 4/5 of the mainframe interface]]. It also has a ×10 amplified output from channel 1 that can be cascaded into the channel 2 input for 500 μV/Div sensitivity at reduced bandwidth (15 MHz). | |||
Types 1A1 and [[1A2]] were [[introduced in 1964|introduced together in 1964]], the former for high-end use, the latter as an upgrade/replacement for [[CA|Type CA]]. | |||
Both remained available until the [[500-series scopes|500-series scope line]] was discontinued. | |||
The 1A1 is not a perfect superset of the 1A2; it supplies external trigger from channel 1 only. | |||
The 1A1 may have evolved from the [[J|Type J]], which never went into production. | |||
{{BeginSpecs}} | |||
{{Spec | Bandwidth | 50 MHz @ 50 mV/Div and up (in fast mainframes), 28 MHz @ 5 mV/Div, 15 MHz with cascaded channels (~0.5 mV/Div) }} | |||
{{Spec | Rise time | 7 ns @ 50 mV/Div and up (in fast mainframes), 13 ns @ 5 mV/Div, 24 ns with cascaded channels (~0.5 mV/Div) }} | |||
{{Spec | Deflection | 5 mV/Div to 20 V/Div, 1−2−5 }} | |||
{{Spec | Max. input | 600 V DC + peak AC }} | |||
{{Spec | Input impedance | 1 MΩ // 15 pF }} | |||
{{Spec | Modes | Ch 1, Ch 2, ALT, CHOP, ADD }} | |||
{{EndSpecs}} | |||
==Links== | |||
* [http://www.amplifier.cd/Test_Equipment/Tektronix/Tektronix_other/1A1.html 1A1 @ amplifier.cd] | |||
{{Documents|Link=1A1}} | |||
==Pictures== | |||
<gallery> | <gallery> | ||
Tek_1A1_Early_Front.jpeg | 1A1 SN121 | |||
Tek 1a1 early style.jpg|Early 1A1 | |||
Tek 1A1 front.jpg | Second 1A1 version | |||
dual_1A1_2.JPG|left: Nuvistor right: FET | |||
dual_1A1_1.JPG|left: Nuvistor right: FET | |||
dual_1A1.JPG|left: Nuvistor right: FET | |||
1A1 Nuvistor mount 1.jpg | Nuvistors under thermal cover, on shock-mounted sub-chassis | |||
1A1 Nuvistor mount 2.jpg | Nuvistor cover and tubes unplugged | |||
1A1 Nuvistor mount 3.jpg | Nuvistor cover and tubes, bottom | |||
1a1_frontend.png|Early 1A1 front end | |||
Tek 1a1 late output amp.png|Late 1A1 Output Amp | |||
Tek 1a1 early left.jpg|Early 1A1 Left View | |||
Tek 1a1 latest.jpg|Latest version of 1A1 | |||
Tek 556 two 1a1.jpg|[[556]] with second version 1A1 in left bay and first version 1A1 in right bay. | |||
Tek 1a1 black.jpg|Black 1A1 | |||
Tek 1a1 latest guernsey.jpg|Latest version 1A1. Photo courtesy of Dan Wilson (Hideaway Studio). | |||
Tek_1A1_Top.jpeg | 1A1 - First Version - Top | |||
Tek_1A1_Underside.jpeg | 1A1 - First Version - Underside | |||
Tek_1A1_RHS.jpeg | 1A1 - First Version - RHS | |||
Tek_1A1_LHS.jpeg | 1A1 - First Version - LHS | |||
Tek_1A1_FETFront-CH1.jpeg | Input FET board CH1 | |||
Tek_1A1_FETFront-CH2.jpeg | Input FET board CH2 | |||
Tek 1a1 front3.jpeg | |||
</gallery> | </gallery> | ||
==Components== | |||
{{Parts|1A1}} | |||
[[Category:500 series plugins]] |
Latest revision as of 05:25, 11 March 2024
The Tektronix Type 1A1 plug-in for the 500-series scopes has two channels and a −3 dB point of 50 MHz at 50 mV/Div, 28 MHz at 5 mV/Div, and 2 Hz to 15 MHz at 500 μV/Div when channels 1 and 2 are cascaded. It was designed by Ron Olson.
There were three distinct versions of 1A1.
- The first version, from 1964 to 1966, has a Nuvistor front-end, and rotary input switches that were concentric with the BNC jacks. The knobs to invert the input channels are concentric with the vertical position knobs.
- The second version, from 1966 to ??? has fluted round V/cm knobs, and lever switches. The channel inversion control is an organ-style pull-push knob. The nuvistors are mounted under a thermal cover on a sub-chassis with rubber stand-offs.
- The third model, from ??? until the end has four-sided V/cm knobs and a FET front-end.
Type 1A1 uses the "ALT SWEEP SLAVE PULSE" signal that is sent by scopes on pin 7 of the plug-in connector. In a Type 547 mainframe, this signal allows channel 1 to be displayed using the "A" timebase and channel 2 using the "B" timebase. This is useful, for example, to view the IF and AF of a radio receiver at the same time. Even after the front-end transitioned from Nuvistors to FETs, the output amplifier continued to use Nuvistors.
Type 1A1 has an External Trigger output for mainframes prior to the 547 that don't support plug-in triggering, and supplies the trigger system on pins 4/5 of the mainframe interface. It also has a ×10 amplified output from channel 1 that can be cascaded into the channel 2 input for 500 μV/Div sensitivity at reduced bandwidth (15 MHz).
Types 1A1 and 1A2 were introduced together in 1964, the former for high-end use, the latter as an upgrade/replacement for Type CA. Both remained available until the 500-series scope line was discontinued.
The 1A1 is not a perfect superset of the 1A2; it supplies external trigger from channel 1 only.
The 1A1 may have evolved from the Type J, which never went into production.
Key Specifications
Bandwidth | 50 MHz @ 50 mV/Div and up (in fast mainframes), 28 MHz @ 5 mV/Div, 15 MHz with cascaded channels (~0.5 mV/Div) |
---|---|
Rise time | 7 ns @ 50 mV/Div and up (in fast mainframes), 13 ns @ 5 mV/Div, 24 ns with cascaded channels (~0.5 mV/Div) |
Deflection | 5 mV/Div to 20 V/Div, 1−2−5 |
Max. input | 600 V DC + peak AC |
Input impedance | 1 MΩ // 15 pF |
Modes | Ch 1, Ch 2, ALT, CHOP, ADD |
Links
Documents Referencing 1A1
Document | Class | Title | Authors | Year | Links |
---|---|---|---|---|---|
Martzloff High-speed Recording System.pdf | Article | High-Speed Transient Recording System | François Martzloff | 1968 | 544 • 1A1 |
Pictures
-
1A1 SN121
-
Early 1A1
-
Second 1A1 version
-
left: Nuvistor right: FET
-
left: Nuvistor right: FET
-
left: Nuvistor right: FET
-
Nuvistors under thermal cover, on shock-mounted sub-chassis
-
Nuvistor cover and tubes unplugged
-
Nuvistor cover and tubes, bottom
-
Early 1A1 front end
-
Late 1A1 Output Amp
-
Early 1A1 Left View
-
Latest version of 1A1
-
556 with second version 1A1 in left bay and first version 1A1 in right bay.
-
Black 1A1
-
Latest version 1A1. Photo courtesy of Dan Wilson (Hideaway Studio).
-
1A1 - First Version - Top
-
1A1 - First Version - Underside
-
1A1 - First Version - RHS
-
1A1 - First Version - LHS
-
Input FET board CH1
-
Input FET board CH2
-
Components
Some Parts Used in the 1A1
Part | Part Number(s) | Class | Description | Used in |
---|---|---|---|---|
7586 | 154-0306-00 | Vacuum Tube (Triode) | Nuvistor triode | M • 1A1 • 1A2 • 1A5 • 10A2 • 10A2A • 11B1 • 11B2A • 321 • 321A • 3A1 • 3A1S • 3A3 • 3A5 • 3A6 • 3A7 • 3A8 • 3A74 • 3S76 • 3T77 • 3T77A • 3B5 • 4S1 • 4S2 • 6R1 • 6R1A • 9A1 • 9A2 • 82 • 86 • S-311 |