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1A5: Difference between revisions
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{{Plugin Sidebar | {{Plugin Sidebar | ||
|manufacturer=Tektronix | |||
summary=50 MHz Differential Amplifier | | |type=1A5 | ||
image=1a5 | |summary=50 MHz Differential Amplifier | ||
caption=Tektronix 1A5 Differential Amplifier | | |image=Tek 1a5 front2.jpeg | ||
series= | |caption=Tektronix 1A5 Differential Amplifier | ||
introduced=1967 | | |series=500-series scopes | ||
discontinued=1975 | | |introduced=1967 | ||
manuals= | |discontinued=1975 | ||
* [ | |designers=Bill DeVey | ||
|manuals= | |||
* [[Media: | * [[Media:070-0638-00.pdf|Tektronix 1A5 Manual]] (OCR) | ||
* [[Media:Tek Type 1A5 FCP 1969.pdf|Tektronix Type 1A5 Factory Calibration Procedure, March 1969]] (OCR) | |||
* [[Media:Tek 1a5 fcp sep 1967.pdf|Tektronix 1A5 Factory Calibration Procedure, September 1967]] | |||
* [[Media:Tek 1a5 cal outline.pdf|Tektronix 1A5 Calibration Outline]] (OCR) | |||
}} | }} | ||
The '''Tektronix Type 1A5''' is a differential amplifier plug-in for [[500-series scopes]]. | The '''Tektronix Type 1A5''' is a differential amplifier plug-in for [[500-series scopes]]. | ||
It was designed by [[Bill DeVey]] after consultation with [[John Kobbe]]. | |||
It has an [[Amphenol 165 series connector]] on the front panel for direct connection of the Type [[P6046|P6046 Active Differential Probe]]. | It has an [[Amphenol 165 series connector]] on the front panel for direct connection of the Type [[P6046|P6046 Active Differential Probe]]. | ||
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{{BeginSpecs}} | {{BeginSpecs}} | ||
{{Spec | Bandwidth | {{Spec | Bandwidth | 50 MHz down to 5 mV/div, 40 MHz at 1 mV/div }} | ||
{{Spec | Deflection | 1 mV/div to 20 V/div, 1−2−5 }} | {{Spec | Deflection | 1 mV/div to 20 V/div, 1−2−5 }} | ||
{{Spec | Common-mode rejection | 20,000:1 | {{Spec | Common-mode rejection | 20,000:1 from DC to 100 kHz, 10,000:1 up to 1 MHz, 200:1 at 20 MHz }} | ||
{{EndSpecs}} | {{EndSpecs}} | ||
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V<sub>C</sub> is controlled by a ten-turn potentiometer and can vary from −5 V to +5 V (0.5 V on the 5 V/div to 20 V/div ranges). | V<sub>C</sub> is controlled by a ten-turn potentiometer and can vary from −5 V to +5 V (0.5 V on the 5 V/div to 20 V/div ranges). | ||
==Internals== | |||
The 1A5 is solid-state except for a pair of [[7586|7586 nuvistors]] used in the upper half of a cascode in the second amplifier stage. | |||
The attenuator switching is mechanically complex. A gear mechanism drives the input attenuator switch (under the internal cover) selecting attenuators ×1000 (20 V/div to 5 V/div), ×100 (2 V/div to 500 mV/div), ×10 (200 mv/div to 50 mV/Div) or no attenuators (20 mV/Div to 1 mV/div). | |||
Additionally, in the 500 mV/div and 50 mV/div positions, the operator can pull the V/Div knob outward when switching to one of the next two more sensitive ranges, in which case the higher attenuator (and higher input and comparison voltage range) remains in place. | |||
==Pictures== | ==Pictures== | ||
<gallery> | <gallery> | ||
1a5 | Tek 1a5 front2.jpeg | ||
</gallery> | </gallery> | ||
'''Interior''' | |||
<gallery> | |||
Tek 1A5 left wo cover.jpg | Left side (attenuator cover removed) | |||
1A5 output board.jpg | Output board (left side) with HF Comp. daughterboard removed to show reed relays | |||
Tek 1A5 right.jpg | Right side | |||
Tek 1a5 left2.jpeg | Left side (attenuator cover in place) | |||
Tek 1a5 right2.jpeg | Right side | |||
Tek 1a5 top2.jpeg | Top | |||
1a5 right.jpg | Top | |||
Tek 1a5 bottom2.jpeg | Bottom | |||
Tek 1a5 rear2.jpeg | Rear | |||
</gallery> | |||
'''Switches detail''' | |||
<gallery> | |||
Tek 1A5 switches 1.jpg | |||
Tek 1A5 switches 2.jpg | |||
Tek 1A5 switches 3.jpg | |||
Tek 1A5 switches 4.jpg | |||
Tek 1A5 switches 5.jpg | |||
</gallery> | |||
==Components== | |||
{{Parts|1A5}} | |||
[[Category:500 series plugins]] | [[Category:500 series plugins]] | ||
[[Category:Differential amplifiers]] | |||