1A2: Difference between revisions
No edit summary |
No edit summary |
||
| (14 intermediate revisions by 2 users not shown) | |||
| Line 1: | Line 1: | ||
{{Plugin Sidebar | {{Plugin Sidebar | ||
|manufacturer=Tektronix | |||
summary=50 MHz dual channel amplifier| | |series=500-series scopes | ||
image=Tek 1a2 | |type=1A2 | ||
caption=1A2 front view| | |summary=50 MHz dual channel amplifier | ||
introduced=1964 | | |image=Tek 1a2 front.jpeg | ||
discontinued=1975 | | |caption=1A2 front view | ||
|introduced=1964 | |||
|discontinued=1975 | |||
* [ | |designers=Larry Biggs | ||
|manuals= | |||
* [[Media: | * [[Media:070-0430-01.pdf|Tektronix 1A2 Manual]] | ||
* [[Media:Tek 1a2 notes.pdf|Tektronix 1A2 Notes]] | |||
* [[Media:1a2 sn6220 parts correction.pdf|Tektronix 1A2 Parts Correction at Serial Number 6220]] | |||
* [[Media:TM-11-6625-2517-14.pdf|Military manual for Tektronix 1A2]] | |||
* [[Media:Tek 1a2 cal outline.pdf|Tektronix 1A2 Calibration Outline]] (OCR) | |||
<small> | |||
'''Alternate copies''' | |||
* [https://w140.com/mmm/tek-1a2.pdf Tektronix 1A2 Manual] | |||
''' | |||
}} | }} | ||
The '''Tektronix 1A2''' is a two-channel plug-in amplifier for [[500-series scopes]]. | The '''Tektronix 1A2''' is a two-channel plug-in amplifier for [[500-series scopes]]. | ||
It provides a −3 dB point of 50 MHz in a [[544]], [[546]], [[547]], or [[556]], and 50 mV/div sensitivity. | It provides a −3 dB point of 50 MHz in a [[544]], [[546]], [[547]], or [[556]], and 50 mV/div sensitivity. | ||
It was designed by [[Larry Biggs]]. | |||
The Type 1A2 was [[introduced in 1964]] together with Types [[1A1]], [[543|543B]], [[545|545B]], [[544]], [[546]], and [[547]]. | The Type 1A2 was [[introduced in 1964]] together with Types [[1A1]], [[543|543B]], [[545|545B]], [[544]], [[546]], and [[547]]. | ||
It was designed to replace the venerable [[CA|Type CA]], while the [[1A1]] delivered | It was designed to replace the venerable [[CA|Type CA]], while the [[1A1]] delivered ten times the sensitivity at a higher price and is able to lock channel 1 to Type [[547]]'s timebase A and channel 2 to timebase B. | ||
ten times the sensitivity at a higher price and is able to lock channel 1 to Type [[547]]'s timebase A | On the other hand, Type 1A2 can select which channel provides triggering when the mainframe is set to Plug-In mode, for scopes having this feature ([[544]], [[546]], [[547]], [[549]], [[556]], late [[555]]). | ||
and channel 2 to timebase B. On the other hand, Type 1A2 can select which channel provides triggering | |||
when the mainframe is set to Plug-In mode, for scopes having this feature ([[544]], [[546]], [[547]], [[549]], [[556]], late [[555]]). | |||
The 1A2 remained available until the [[500-series scopes|500-series scope line]] was discontinued. | The 1A2 remained available until the [[500-series scopes|500-series scope line]] was discontinued. | ||
| Line 29: | Line 35: | ||
1A1 and 1A2 share some mechanical design, but the circuits have few details in common. | 1A1 and 1A2 share some mechanical design, but the circuits have few details in common. | ||
Below serial number 11000, the 1A2 uses a [[7586]] [[nuvistor]] at the front end as a cathode follower. | |||
Above serial number 11100, the front-end uses a FET for this function. | |||
After the front-end buffer, one input of an NPN differential amplifier is driven to produce a differential current-mode signal at the collectors. | |||
Silicon diodes form an analog multiplexer that switches between the two inputs. | Silicon diodes form an analog multiplexer that switches between the two inputs. | ||
| Line 54: | Line 61: | ||
Tek 1a2 b4.jpg | Tek 1a2 b4.jpg | ||
Tek 1a2 b5.jpg | Tek 1a2 b5.jpg | ||
1a2front132.jpg|1A2 serial number 132 | |||
1a2top132.jpg|1A2 serial number 132 | |||
1a2nuvistor132.jpg|1A2 serial number 132 | |||
1a2bottom132.jpg|1A2 serial number 132 | |||
</gallery> | </gallery> | ||
==Components== | |||
{{Parts|1A2}} | |||
[[Category:500 series plugins]] | [[Category:500 series plugins]] | ||
Latest revision as of 15:24, 14 December 2023
The Tektronix 1A2 is a two-channel plug-in amplifier for 500-series scopes. It provides a −3 dB point of 50 MHz in a 544, 546, 547, or 556, and 50 mV/div sensitivity. It was designed by Larry Biggs.
The Type 1A2 was introduced in 1964 together with Types 1A1, 543B, 545B, 544, 546, and 547. It was designed to replace the venerable Type CA, while the 1A1 delivered ten times the sensitivity at a higher price and is able to lock channel 1 to Type 547's timebase A and channel 2 to timebase B. On the other hand, Type 1A2 can select which channel provides triggering when the mainframe is set to Plug-In mode, for scopes having this feature (544, 546, 547, 549, 556, late 555).
The 1A2 remained available until the 500-series scope line was discontinued.
Key Specifications
- please add
Internals
1A1 and 1A2 share some mechanical design, but the circuits have few details in common.
Below serial number 11000, the 1A2 uses a 7586 nuvistor at the front end as a cathode follower. Above serial number 11100, the front-end uses a FET for this function. After the front-end buffer, one input of an NPN differential amplifier is driven to produce a differential current-mode signal at the collectors.
Silicon diodes form an analog multiplexer that switches between the two inputs. A cross-coupled pair of PNP transistors forms a multivibrator that generates the voltages that control the diodes that select the input channel.
Pictures
-
-
-
-
-
1A2 right
-
1A2 left
-
1A2 top
-
1A2 bottom
-
-
-
-
-
-
-
-
-
1A2 serial number 132
-
1A2 serial number 132
-
1A2 serial number 132
-
1A2 serial number 132
Components
Some Parts Used in the 1A2
| Part | Part Number(s) | Class | Description | Used in |
|---|---|---|---|---|
| 7586 | 154-0306-00 | Vacuum Tube (Triode) | Nuvistor triode | M • 1A1 • 1A2 • 1A5 • 10A2 • 10A2A • 11B1 • 11B2A • 321 • 321A • 3A1 • 3A1S • 3A3 • 3A5 • 3A6 • 3A7 • 3A8 • 3A74 • 3S76 • 3T77 • 3T77A • 3B5 • 4S1 • 4S2 • 6R1 • 6R1A • 9A1 • 9A2 • 82 • 86 • S-311 |