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The 465M is essentially a 100MHz bandwidth scope in a the cabinet of a [[455]].
{{Oscilloscope Sidebar
The construction methods of the 455, 465M and the [[900-series_scopes|T900 series]] are similar. 
|manufacturer=Tektronix
In contrast to typical 400-series portable scopes,
|series=400-series scopes
which use socketed semiconductors, the 465M's semiconductors are soldered in place.
|model=465M  
In theory, this gives the 465M a reliability advantage.
|summary=100 MHz dual channel portable scope  
The front panel layout of the 465M is
|image=Tek 465m 1.jpg
nearly identical in appearance and function
|caption=Tektronix 465M  
to that of the 465.
|introduced=1977
Since the vertical preamplifier and trigger/sweep unit
|discontinued=(?)
are implemented as plug-in modules, one might guess
|designers=
that there would be other implementations of those functions,
|manuals=
but there weren't. 
* [[Media:070-2237-00.pdf|Tektronix 465M Service Manual]] (OCR)
What you see is what was made. 
<small>
There never was a single-channel vertical amplifier or a single timebase module made,  
'''Alternate copies'''
although some may have been originally on the drawing board.
* [http://www.ko4bb.com/getsimple/index.php?id=manuals&dir=Tektronix/Tektronix_-_465M_Oscilloscope Tektronix 465M Service Manual] 
* [[Media:465M schematics.pdf|465M schematics]]
* [[Media:tek_465M_schematics.pdf|465M schematics (PDF, OCR, no-OCR)]]
</small>
}}
The '''Tektronix 465M''' is a 100 MHz dual-channel portable scope, the commercial version of the AN/USM 425 standard military scope.


Whether or not the 465M was more rugged than the original 465 is unknown. 
It is essentially a 100 MHz bandwidth scope in the cabinet of a [[455]]. A large user of the 465Ms was the Federal Aviation Administration.  
In the Oklahoma City Tektronix Service Center,
a lot of 465Ms came in for warranty service,
primarily from the Federal Aviation Administration
which had purchased a large quantity of that model. 
But the rate at which instruments are brought to a service center
is not by itself a measure of reliability, as one would be comparing
the failure rate of a large number of new 465Ms  
that were shipped to the customer's depot
with an established base of 465s which already had
most early defects corrected.


* [http://www.ko4bb.com/manuals/index.php?dir=Tektronix/Tektronix_-_465M_Oscilloscope Tektronix 465M Service Manual (KO4BB's Manuals Repository)]
==Links==
* [https://www.youtube.com/watch?v=DLHN4PYxV3A 465M teardown] @ YouTube
* [https://www.youtube.com/watch?v=qAZOi5DsMcw Tektronix 465M Part 1 - Intro and DC tests] @ YouTube
* [https://www.youtube.com/watch?v=4uDw6F06D1I Tektronix 465M Analog Oscilloscope Repair And Checkout] @ YouTube
{{Documents|Link=465M}}


==Internals==
The construction methods of the 455, 465M and the [[T900-series scopes|T900 series]] are similar. 
In contrast to typical 400-series portable scopes, which use socketed semiconductors, the 465M's semiconductors are soldered in place, giving it a theoretical reliability advantage.
The front panel layout of the 465M is nearly identical in appearance and function to that of the 465. 
Since the vertical preamplifier and trigger/sweep unit are implemented as plug-in modules, one might guess that there would be other implementations of those functions, but there weren't - what you see is what was made. 
There never was a single-channel vertical amplifier or a single timebase module made, although some may have been originally on the drawing board. 
Whether or not the 465M was more reliable than the original 465 is unknown. 
==Pictures==
<gallery>
<gallery>
File:Tek 465m 1.jpg
Tek 465m 1.jpg
File:Tek 465m 2.jpg
Tek 465m two triag.jpg
File:Tek 465m 3.jpg
Tek 465m 2.jpg
Tek 465m 3.jpg
Tek_465M-Front.jpg | Tek 465M Front Panel
Tek_465M-Del-Sweep.jpg | Tek 465M Delayed Sweep
Tek_465M_Without-Modules.png |Tek 465M - Internal Plugins
Tek_465M-H-Plug-in3.jpg | Tek 465M - H Plugin Assy.Board A6 to A10 - Side View
Tek_465M-H-Plug-in4.jpg | Tek 465M - H Plugin Assy.Board A6 to A10 - Side View
Tek_465M-H-Plug-in1.jpg | Tek 465M - H Plugin Assy, Board A6 to A10 - Front View
Tek_465M-H-Plug-in2.jpg| H Plugin Assy, Board A6 to A10 - Front View
Tek_465M-VertModules-A1-A5jpg.jpg | Tek 465M Vertical Plug-in Assy- Boards A1-A5
Tek_465M-Vert-Plug-in.jpg | Tek 465M Vertical Plug-in Assy- Boards A1-A5
Tek_465M-DelayLine1.jpg |  Tek 465M Delay Line In Vertical Module
Tek_465M-DelayLine2.jpg | Tek 465M Delay Line In Vertical Module
Tek_465M-Side2-Noplug-in.jpg | Tek 465M  Side View without H Plug-in
Tek_465M-Front-No-Plugin.jpg | Tek 465M without Internal Plug-Ins
Tek_465M-Side1-No-Plug-in.jpg | Tek 465M Side View without V Plug-in
Tek_465M-Top-Noplug-in.jpg | Tek 465M Side View without Internal Plug-Ins
Tek_465M-Power-HV-Trans.jpg | Tek 465M Power and HV Transformer
Tek_465M-A11-Soldered.jpg | Tek 465M - A11 Board - Soldered Transistors (Not socketed)
</gallery>
</gallery>


==Components==
{{Parts|465M}}


[[Category:400 series scopes]]
[[Category:400 series scopes]]
[[Category:Specifications needed]]
[[Category:Specifications needed]]
[[Category:Description needed]]

Latest revision as of 08:55, 12 October 2023

Tektronix 465M
100 MHz dual channel portable scope
Tektronix 465M

Produced from 1977 to (?)

Manuals

Alternate copies

(All manuals in PDF format unless noted otherwise)
Manuals – Specifications – Links – Pictures

The Tektronix 465M is a 100 MHz dual-channel portable scope, the commercial version of the AN/USM 425 standard military scope.

It is essentially a 100 MHz bandwidth scope in the cabinet of a 455. A large user of the 465Ms was the Federal Aviation Administration.

Links

Documents Referencing 465M

Document Class Title Authors Year Links
Tekscope 1977 V9 N2.pdf Article New Products 1977 465M • AN/USM425 • Rack Cart Model 7 • 4051E01 • 650A • P6420 • P6062B • P6063B • P6106 • 016-0629-00

Internals

The construction methods of the 455, 465M and the T900 series are similar. In contrast to typical 400-series portable scopes, which use socketed semiconductors, the 465M's semiconductors are soldered in place, giving it a theoretical reliability advantage.

The front panel layout of the 465M is nearly identical in appearance and function to that of the 465.

Since the vertical preamplifier and trigger/sweep unit are implemented as plug-in modules, one might guess that there would be other implementations of those functions, but there weren't - what you see is what was made.

There never was a single-channel vertical amplifier or a single timebase module made, although some may have been originally on the drawing board.

Whether or not the 465M was more reliable than the original 465 is unknown.

Pictures

  • Tek 465M Front Panel

    Tek 465M Front Panel

  • Tek 465M Delayed Sweep

    Tek 465M Delayed Sweep

  • Tek 465M - Internal Plugins

    Tek 465M - Internal Plugins

  • Tek 465M - H Plugin Assy.Board A6 to A10 - Side View

    Tek 465M - H Plugin Assy.Board A6 to A10 - Side View

  • Tek 465M - H Plugin Assy.Board A6 to A10 - Side View

    Tek 465M - H Plugin Assy.Board A6 to A10 - Side View

  • Tek 465M - H Plugin Assy, Board A6 to A10 - Front View

    Tek 465M - H Plugin Assy, Board A6 to A10 - Front View

  • H Plugin Assy, Board A6 to A10 - Front View

    H Plugin Assy, Board A6 to A10 - Front View

  • Tek 465M Vertical Plug-in Assy- Boards A1-A5

    Tek 465M Vertical Plug-in Assy- Boards A1-A5

  • Tek 465M Vertical Plug-in Assy- Boards A1-A5

    Tek 465M Vertical Plug-in Assy- Boards A1-A5

  • Tek 465M Delay Line In Vertical Module

    Tek 465M Delay Line In Vertical Module

  • Tek 465M Delay Line In Vertical Module

    Tek 465M Delay Line In Vertical Module

  • Tek 465M Side View without H Plug-in

    Tek 465M Side View without H Plug-in

  • Tek 465M without Internal Plug-Ins

    Tek 465M without Internal Plug-Ins

  • Tek 465M Side View without V Plug-in

    Tek 465M Side View without V Plug-in

  • Tek 465M Side View without Internal Plug-Ins

    Tek 465M Side View without Internal Plug-Ins

  • Tek 465M Power and HV Transformer

    Tek 465M Power and HV Transformer

  • Tek 465M - A11 Board - Soldered Transistors (Not socketed)

    Tek 465M - A11 Board - Soldered Transistors (Not socketed)

Components

Some Parts Used in the 465M

Part Part Number(s) Class Description Used in
154-0777-00 154-0777-00 CRT CRT 465M
155-0151-00 155-0151-00 Monolithic integrated circuit trigger generator 465M
155-0155-00 155-0155-00 Hybrid integrated circuit pre-amplifier 455 • 465M
1N3182 152-0269-00 Discrete component varactor diode 3L5 • 1L5 • 3T7 • 492 • 465M • 7844 • 2465
203-0130-90 203-0130-90 Monolithic integrated circuit preamplifier 455 • 465M • 155-0155-00 • 155-0161-00
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