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3A8: Difference between revisions
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* [[Media:Tek type 3a8 irb.pdf|Tektronix 3A8 Instrument Reference Book]] (OCR) | * [[Media:Tek type 3a8 irb.pdf|Tektronix 3A8 Instrument Reference Book]] (OCR) | ||
}} | }} | ||
The '''Tektronix 3A8''' is an operational amplifier plug-in for [[560-series scopes]] | The '''Tektronix 3A8''' is an operational amplifier plug-in for [[560-series scopes]], designed by [[Roy Hayes]] and [[introduced in 1965]]. | ||
The 3A8 contains two operational amplifiers and a vertical display amplifier. | |||
Each operational amplifier has external inputs and outputs. Input and feedback resistances / capacitances are separately switch-selectable to provide a variety of opamp functions. | |||
External components can be substituted by way of front panel banana sockets, which also accept special purpose adapters (see ''Accessories''). | |||
The display amplifier can be connected to the output of either operational amplifier, or an external input. The input can be AC or DC coupled and can be inverted. | |||
{{BeginSpecs}} | {{BeginSpecs}} | ||
{{Spec | Gain Bandwidth Product | ≥10 MHz }} | |||
{{Spec | DC Open Loop Gain | ≥ 10,000 }} | |||
{{Spec | Output | ≥ ± 25 V driving ≥ 7.5 mA (including feedback current) }} | |||
{{Spec | Display Amplifier Bandwidth | DC to 3.5 MHz }} | {{Spec | Display Amplifier Bandwidth | DC to 3.5 MHz }} | ||
{{Spec | Display Amplifier Sensitivity | 20 mV/cm to 10 V/cm }} | {{Spec | Display Amplifier Sensitivity | 20 mV/cm to 10 V/cm }} | ||
{{EndSpecs}} | {{EndSpecs}} | ||
==Internals == | ==Internals == | ||
The 3A8 | The 3A8 has several transistors plus three 9-pin vacuum tubes, an [[8416]] and two [[6KV8]]s. | ||
Each operational amplifier has a number of transistors plus three [[Nuvistor]]s: a [[6CW4]] and a selected pair of [[7586]]s. | |||
==Accessories== | ==Accessories== | ||