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The Tektronix 80P is the probe for the [[80|Type 80]] plug-in for the [[581]] and [[585]] oscilloscopes.
{{Probe Sidebar
It is a cathode-follower probe, and contains a [[6688]] pentode.
|manufacturer=Tektronix
The tube functions as a phase splitter, not a simple cathode-follower.
|model=P80
|summary=Active probe for 581/585+80
|image=Tek p80 side.JPG
|caption=Tektronix P80
|for=80
|introduced=1959
|discontinued=(?)
|manuals=
* [[Media:070-276.pdf|Tektronix Type 80 / P80 Manual]] (OCR, sn 4986, color schematics)
* [[Media:070-276 with mod 5107.pdf|Tektronix Type 80 / P80 Manual with Mod 5107]] (OCR)
}}
The '''Tektronix P80''' is an active probe that works only with the [[80|Type 80]] plug-in for the [[581]] and [[585]] oscilloscopes.


The P80 contains a [[6688|6688 (E180F) miniature RF pentode]], which functions as a phase splitter providing 93 Ω differential outputs, not a simple cathode-follower.
The P80 came with five attenuator heads:
{| class="wikitable" style="margin:auto"
|+ P80 attenuator heads
! part number
! attenuation factor
|-
| 010-306 || 2x
|-
| 010-307 || 5x
|-
| 010-308 || 10x
|-
| 010-309 || 20x
|-
| 010-310 || 50x
|}
{{BeginSpecs}}
{{Spec | Rise time | 3.5 ns in combination with [[80|Type 80]] }}
{{Spec | Bandwidth | DC to 100 MHz (from 25 Ω source) in combination with [[80|Type 80]] }}
{{Spec | Deflection | 0.1 V/Div (fixed) without optional attenuators; 0.2/0.4/0.5/1/2/5/10/20/50/100/200/500/1000 V/Div with attenuators }}
{{Spec | Input impedance | 100 kΩ // <14 pF (including capacitive coupler, without attenuators) }}
{{Spec | Input voltage | max. 150 V<sub>DC</sub> in AC position; max. 600 V<sub>DC</sub> with optional capacitive coupler; max. 100 V<sub>DC</sub> when DC coupled (without optional attenuators) }}
{{EndSpecs}}
==Pictures==
<gallery>
<gallery>
File:Tek p80 side.JPG
Tek p80 side.JPG
File:Tek p80 rear.JPG|Vents for tube
Tek p80 rear.JPG|Vents for tube
File:Tek p80 connector.JPG|Connector, plugs into [[80|Type 80]]
Tek p80 internal.JPG
File:Tek p80 internal.JPG
Tek p80 internal tube.JPG
File:Tek p80 internal circuit.JPG
Tek p80 internal circuit.JPG
File:Tek p80 internal circuit 2.JPG
Tek p80 internal circuit 2.JPG
File:Tek p80 internal tube.JPG
Tek type 80 with probe.jpg | P80 attached to [[80|Model 80]]
File:Tek 80 probe schem.png|Schematic
Tek p80 connector.JPG|[[Amphenol 165 series connectors|Amphenol 165-14 connector]], plugs into [[80|Type 80]]
1959 catalog photo of 581.jpg|Photo from 1959 catalog showing Type 581 mainframe, Type 80 plug-in, Type P80 probe, and attenuator heads
Tek 80 probe schem.png|Schematic
</gallery>
</gallery>
==Components==
{{Parts|P80}}
[[Category:Active oscilloscope probes]]

Latest revision as of 11:47, 20 January 2024

The Tektronix P80 is an active probe that works only with the Type 80 plug-in for the 581 and 585 oscilloscopes.

Tektronix P80
Active probe for 581/585+80
Tektronix P80

Compatible with 80

Produced from 1959 to (?)

Manuals


The P80 contains a 6688 (E180F) miniature RF pentode, which functions as a phase splitter providing 93 Ω differential outputs, not a simple cathode-follower.

The P80 came with five attenuator heads:

P80 attenuator heads
part number attenuation factor
010-306 2x
010-307 5x
010-308 10x
010-309 20x
010-310 50x

Key Specifications

Rise time 3.5 ns in combination with Type 80
Bandwidth DC to 100 MHz (from 25 Ω source) in combination with Type 80
Deflection 0.1 V/Div (fixed) without optional attenuators; 0.2/0.4/0.5/1/2/5/10/20/50/100/200/500/1000 V/Div with attenuators
Input impedance 100 kΩ // <14 pF (including capacitive coupler, without attenuators)
Input voltage max. 150 VDC in AC position; max. 600 VDC with optional capacitive coupler; max. 100 VDC when DC coupled (without optional attenuators)

Pictures

Components

Some Parts Used in the P80

Part Part Number(s) Class Description Used in
6688 154-0215-00 Vacuum Tube (Pentode) miniature high-slope VHF/UHF pentode P80 • 3T77 • 3T77A • 4S2A • 526 • TR-4602
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