212

Manuals – Specifications – Links – Pictures

The Tektronix 212 is a small portable analog dual-trace CRT oscilloscope with a bandwidth of 500 kHz. The 212 "Miniscope" was developed by a group led by Dave Allen.

Key Specifications

Bandwidth	500 kHz (reduced to 400/300/100 kHz in 5/2/1 mV/Div ranges)
Deflection	1 mV/Div to 50 V/Div, 1-2-5, and variable (up to 125 V/Div), or X-Y (X via Ch1)
Sweep	500 ms/Div to 5 μS/Div, 1-2-5, and variable magnifier 1-5 ×
Input impedance	1 MΩ // 140 pF (160 pF below 100 mV/Div)
Trigger sensitivity	0.2 Div internal, 1 V external (banana jack input)
CRT	6 × 10 divisions of 0.203" (5.16 mm), 154-0699-00 tube, P31 phosphor, 1 kV acceleration
Power	10 internal size A NiCd cells, 3-5 hour operation, or AC line, < 3 W

Gerbers

• 670-8208-00 Rectifier upgrade PCB files (ZIP)

Links

• Tektronix 212 Portable Scope Repair by NFM @ YouTube

Pictures

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  Front

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  Front right

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  Right

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  Rear right

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  Left

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  Bottom

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  With manual

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  Internal

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  re-built battery pack

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Components

Some Parts Used in the 212

Part	Part Number(s)	Class	Description	Used in
154-0699-00	154-0699-00 • 154-0699-50	CRT	directly-heated CRT for miniature scopes	211 • 212 • SC501
155-0047-00	155-0047-00	Monolithic integrated circuit	dual variable-gain amplifier	211 • 212 • 214
155-0048-01	155-0048-00 • 155-0048-01 • 155-0055-00 • 155-0055-01	Monolithic integrated circuit	trigger sweep	211 • 212 • 213 • 214 • 432 • 433 • 5B12N • 5B13N • 5L4N • 603 • 604 • 605 • 606 • 607 • 624 • SC501 • R7912
155-0083-00	155-0083-00	Monolithic integrated circuit	dual operational amplifier and dual current source	212 • 214