7A14: Difference between revisions
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{{Plugin Sidebar | {{Plugin Sidebar | ||
|manufacturer=Tektronix | |||
summary=120 MHz current probe amplifier| | |series=7000-series scopes | ||
image=Tek 7a14.jpg | | |type=7A14 | ||
caption=7A14 | | |summary=120 MHz current probe amplifier | ||
introduced=1969 | | |image=Tek 7a14 de.jpg | ||
discontinued=1975 | | |caption=7A14 | ||
|introduced=1969 | |||
manuals= | |discontinued=1975 | ||
* [ | |designers=Hans Springer; | ||
|manuals= | |||
* [[Media:070-0979-00.pdf|Tektronix 7A14 Manual]] | |||
}} | }} | ||
The '''Tektronix 7A14''' is a 120 MHz current probe amplifier vertical plug-in for [[7000-series scopes|7000 series]], intended to be used with passive current probes such as the [[P6021]] and [[P6022]]. | |||
The | The [[P6019]] and [[P6020]] also work but with reduced bandwidth flatness, and the P6019 needs an adapter (s.b.) | ||
The 7A14 is one of the original plug-in modules [[introduced in 1969|introduced at the start of the 7000 series in 1969]]. | |||
{{BeginSpecs}} | |||
{{Spec | Deflection | 1 mA/Div to 1 A/Div in 1–2–5 sequence }} | |||
{{Spec | Bandwidth | P6021: 25 Hz – 50 MHz (55 MHz in [[7904|79xx]])<br />P6022: 250 Hz – 105 MHz (120 MHz in [[7904|79xx]], 80 MHz in [[7603|76xx]])}} | |||
{{EndSpecs}} | |||
==Operation== | |||
In the 7A14, the ring around the input [[BNC connector]] that is used to identify ×10/×100 probes on voltage probes serves the purpose of detecting the difference between the P6021 and P6022 probes, and switching in appropriate gain and frequency compensation. | |||
The P6021 shorts this ring to ground, directly switching three relays connected to −15 V internally. When connecting a [[P6019]] probe, the ring must also be grounded but the probe connector does not have the matching pin. The [[131-0750-00]] adapter solves this problem. | |||
The front panel gain control screwdriver adjustment affects gain for either P6021 or P6022, i.e. swapping probes requires re-adjustment. | |||
==Links== | ==Links== | ||
* [http://www.barrytech.com/tektronix/tek7000/tek7a14.html Tek 7A14 @ barrytech.com] | * [http://www.barrytech.com/tektronix/tek7000/tek7a14.html Tek 7A14 @ barrytech.com] | ||
==Internals== | |||
The 7A14 uses twelve Tek-made [[miniature relays]] that can be a service issue. | |||
The amplifier is an 8-stage discrete differential design. | |||
The plug-in contains no integrated circuits. | |||
==Prices== | |||
{| class="wikitable" | |||
|- | |||
! Year | |||
! 1969 | |||
! 1974 | |||
|- | |||
! Catalog price | |||
|width="4em" "align="right" | $575 | |||
|width="4em" align="right" | $700 | |||
|- | |||
! In 2022 Dollars | |||
|align="right" | $4,600 | |||
|align="right" | $4,200 | |||
|- | |||
|} | |||
==Pictures== | ==Pictures== | ||
<gallery> | <gallery> | ||
Tek 7a14 1.jpg | |||
Tek 7a14 12.jpg | |||
Tek 7a14 3.jpg | |||
7a14 front.jpg | 7A14 front panel | |||
7a14 left.jpg | 7A14, left side | |||
7a14 right.jpg | 7A14, right side | |||
Tek 7a14.jpg | |||
Tek 7a14 2.jpg | |||
Tek 7a14 new products 1969.jpg | |||
</gallery> | </gallery> | ||
[[Category:7000 series vertical plugins]] | [[Category:7000 series vertical plugins]] |
Revision as of 04:11, 28 January 2023
The Tektronix 7A14 is a 120 MHz current probe amplifier vertical plug-in for 7000 series, intended to be used with passive current probes such as the P6021 and P6022.
The P6019 and P6020 also work but with reduced bandwidth flatness, and the P6019 needs an adapter (s.b.)
The 7A14 is one of the original plug-in modules introduced at the start of the 7000 series in 1969.
Key Specifications
Deflection | 1 mA/Div to 1 A/Div in 1–2–5 sequence |
---|---|
Bandwidth | P6021: 25 Hz – 50 MHz (55 MHz in 79xx) P6022: 250 Hz – 105 MHz (120 MHz in 79xx, 80 MHz in 76xx) |
Operation
In the 7A14, the ring around the input BNC connector that is used to identify ×10/×100 probes on voltage probes serves the purpose of detecting the difference between the P6021 and P6022 probes, and switching in appropriate gain and frequency compensation. The P6021 shorts this ring to ground, directly switching three relays connected to −15 V internally. When connecting a P6019 probe, the ring must also be grounded but the probe connector does not have the matching pin. The 131-0750-00 adapter solves this problem.
The front panel gain control screwdriver adjustment affects gain for either P6021 or P6022, i.e. swapping probes requires re-adjustment.
Links
Internals
The 7A14 uses twelve Tek-made miniature relays that can be a service issue.
The amplifier is an 8-stage discrete differential design. The plug-in contains no integrated circuits.
Prices
Year | 1969 | 1974 |
---|---|---|
Catalog price | $575 | $700 |
In 2022 Dollars | $4,600 | $4,200 |
Pictures
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7A14 front panel
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7A14, left side
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7A14, right side
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