465M
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.
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.
Links
- 465M teardown @ YouTube
- Tektronix 465M Part 1 - Intro and DC tests @ YouTube
- Tektronix 465M Analog Oscilloscope Repair And Checkout @ YouTube
Pictures
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Tek 465M Front Panel
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Tek 465M Delayed Sweep
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Tek 465M - Internal Plugins
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Tek 465M - H Plugin Assy.Board A6 to A10 - Side View
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Tek 465M - H Plugin Assy.Board A6 to A10 - Side View
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Tek 465M - H Plugin Assy, Board A6 to A10 - Front View
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H Plugin Assy, Board A6 to A10 - Front View
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Tek 465M Vertical Plug-in Assy- Boards A1-A5
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Tek 465M Vertical Plug-in Assy- Boards A1-A5
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Tek 465M Delay Line In Vertical Module
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Tek 465M Delay Line In Vertical Module
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Tek 465M Side View without H Plug-in
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Tek 465M without Internal Plug-Ins
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Tek 465M Side View without V Plug-in
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Tek 465M Side View without Internal Plug-Ins
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Tek 465M Power and HV Transformer
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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 |