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title=Tektronix 1A1| | title=Tektronix 1A1| | ||
summary=50 MHz dual channel amplifier| | summary=50 MHz dual channel amplifier| | ||
image= | image=Tek 1A1 front.jpg | | ||
caption=1A1 front view| | caption=1A1 front view| | ||
introduced=1964 | | introduced=1964 | | ||
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* [http://w140.com/mmm/tek-1a1-early.pdf Tektronix 1A1 Manual (early) (PDF)] | * [http://w140.com/mmm/tek-1a1-early.pdf Tektronix 1A1 Manual (early) (PDF)] | ||
* [http://w140.com/mmm/tek-1a1-late.pdf Tektronix 1A1 Manual (late) (PDF)] | * [http://w140.com/mmm/tek-1a1-late.pdf Tektronix 1A1 Manual (late) (PDF)] | ||
* [http://w140.com/tek_fcp/tek_type_1a1_factory_cal_proc.pdf Tektronix 1A1 Field Recalibration Procedure (PDF)] | <!-- * [http://w140.com/tek_fcp/tek_type_1a1_factory_cal_proc.pdf Tektronix 1A1 Field Recalibration Procedure (PDF)] --> | ||
* [http://w140.com/Tektronix_1A1_SN20000up_german_short_version_300dpi.pdf Tektronix 1A1 Manual SN20000-up German Short Version (PDF)] | * [http://w140.com/Tektronix_1A1_SN20000up_german_short_version_300dpi.pdf Tektronix 1A1 Manual SN20000-up German Short Version (PDF)] | ||
* [[Media:070-378.pdf|Tektronix 1A1 Manual (early) (PDF, OCR)]] | * [[Media:070-378.pdf|Tektronix 1A1 Manual (early) (PDF, OCR, bad-OCR)]] | ||
* [[Media:070-0885-00.pdf|Tektronix 1A1 Manual (late) (PDF, OCR, bad-OCR)]] | |||
* [[Media:tek_1a1_field_cal_proc.pdf|Tektronix 1A1 Field Recalibration Procedure (PDF, OCR)]] | * [[Media:tek_1a1_field_cal_proc.pdf|Tektronix 1A1 Field Recalibration Procedure (PDF, OCR)]] | ||
* [[Media:tek_1a1_sn20000up_german_short_version.pdf|Tektronix 1A1 Manual SN20000-up German Short Version (PDF, OCR)]] | * [[Media:tek_1a1_sn20000up_german_short_version.pdf|Tektronix 1A1 Manual SN20000-up German Short Version (PDF, OCR, bad-OCR)]] | ||
}} | }} | ||
The '''Tektronix Type 1A1''' plug-in for the [[500-series scopes]] has two channels | The '''Tektronix Type 1A1''' plug-in for the [[500-series scopes]] has two channels | ||
and a | 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. | and 2 Hz to 15 MHz at 500 μV/Div when channels 1 and 2 are cascaded. | ||
There were three distinct versions of 1A1. | 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 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 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. | * 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. | 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, | In a Type [[547]] mainframe, this signal allows channel 1 to be displayed using the "A" timebase | ||
this signal allows channel 1 to be displayed using the "A" timebase | |||
and channel 2 using the "B" 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. | 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, | Even after the front-end transitioned from Nuvistors to FETs, the output amplifier continued to use Nuvistors. | ||
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. | 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]], | Types 1A1 and [[1A2]] were [[introduced in 1964|introduced together in 1964]], | ||
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The 1A1 may have evolved from the [[J|Type J]], which never went into production. | 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== | ==Links== | ||
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<gallery> | <gallery> | ||
Tek 1a1 early style.jpg|Early 1A1 | Tek 1a1 early style.jpg|Early 1A1 | ||
Tek 1A1 front.jpg | Second 1A1 version | |||
dual_1A1_2.JPG|left: Nuvistor right: FET | dual_1A1_2.JPG|left: Nuvistor right: FET | ||
dual_1A1_1.JPG|left: Nuvistor right: FET | dual_1A1_1.JPG|left: Nuvistor right: FET | ||
dual_1A1.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 | 1a1_frontend.png|Early 1A1 front end | ||
Tek 1a1 late output amp.png|Late 1A1 Output Amp | Tek 1a1 late output amp.png|Late 1A1 Output Amp |