551: Difference between revisions

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Early 551 units used [[UHF connector]]s.  Many were converted in the field to use [[BNC connector]]s.
Early 551 units used [[UHF connector]]s.  Many were converted in the field to use [[BNC connector]]s.


==Specifications==
{{BeginSpecs}}
{{Spec | CRT | [[T57]] (T551) in early, [[T5511]] in later (SN 2032+) models }}
{{EndSpecs}}


{| border="1" style="text-align: center;"
{| class="wikitable" style="text-align: center;"
|+ Comparison of 551 with 555
|+Comparison of 551 with 555
! scope="col" |
! scope="col" |
! scope="col" | 551
! scope="col" | 551
! scope="col" | 555
! scope="col" | 555
|-
|-
! scope="col" | Risetime with Type K
! scope="col" | Rise time with Type K
| 14ns
| 14 ns
| 12ns
| 12 ns
|-
|-
! scope="col" | Acceleration Voltage
! scope="col" | Acceleration Voltage
| 10kV
| 10 kV
| 10kV
| 10 kV
|-
|-
! scope="col" | Filament Regulation
! scope="col" | Filament Regulation
Line 47: Line 49:
| saturable core reactor
| saturable core reactor
|-
|-
! scope="row" | Price in 1965
! scope="row" | Price in 1965 <br />(2015 equiv.)
| $1850 || $2650
| $1,850 <br />($14,000) || $2,650 <br />($20,100)
|-  
|-  
! scope="row" | Indicator Weight
! scope="row" | Indicator Weight
| 52 pounds
| 52 lb (23.6 kg)
| 68 pounds
| 68 lb (30.8 kg)
|-
|-
! scope="row" | Power Supply Weight
! scope="row" | Power Supply Weight
| 42 pounds
| 42 lb (19 kg)
| 45 pounds
| 45 lb (20.4 kg)
|-
|-
! scope="row" | Power Consumption
! scope="row" | Power Consumption
| 850 watts
| 850 W
| 1050 watts
| 1050 W
|}
|}


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<gallery>
<gallery>
Image:551_front.jpg|Front view.
File:551_front.jpg|Front view.
Image:551_ps.jpg|External power supply.
File:551_ps.jpg|External power supply.
Image:551_leftint.jpg|Left side.
File:551_leftint.jpg|Left side.
Image:551_rightint.jpg|Right side.
File:551_rightint.jpg|Right side.
Image:551_top.jpg|Top view.
File:551_top.jpg|Top view.
Image:551 block.gif|Block diagram
File:551 block.gif|Block diagram
Image:551 vert.gif|Vertical amplifier
File:551 vert.gif|Vertical amplifier
Image:Tek 551 trigger.png|trigger schematic
File:Tek 551 trigger.png|trigger schematic
File:Tek 551 high voltage section.png|CRT circuit
File:Tek 551 high voltage section.png|CRT circuit
Image:Tek 551 block.png|block diagram
File:Tek 551 block.png|block diagram
Image:Tek 551 ps bottom.jpg|bottom of power supply
File:Tek 551 ps bottom.jpg|bottom of power supply
File:1-551 001.jpg|Tek 551 Mod 108A
File:1-551 001.jpg|Tek 551 Mod 108A
File:1-551 004.jpg|551 with Mod 108A
File:1-551 004.jpg|551 with Mod 108A

Revision as of 14:11, 12 September 2015

{{{manufacturer}}} 
27 MHz scope
Tektronix 551

Produced from 1958 to (?)

Manuals
Manuals – Specifications – Links – Pictures

The Tektronix Type 551, introduced in 1958, is a 27 MHz dual-beam scope that takes two letter-series and 1-series plug-ins. '

Unlike the 555, it has only one set of horizontal deflection plates and the trigger and sweep circuitry are built in to the mainframe. Like the 555, the 551 has an external power supply unit. The external power supplies of the 555 and 551 are not interchangeable. The vertical amplifiers of the 545A, 551, and 555 are identical.

The 551 uses an L-C delay line for each vertical channel.

A factory modification, MOD 108A, was available for increasing the CRT acceleration voltage from 10 kV to 12 kV. This improved trace visibility at high sweep rates.

Early 551 units used UHF connectors. Many were converted in the field to use BNC connectors.

Key Specifications

CRT T57 (T551) in early, T5511 in later (SN 2032+) models
Comparison of 551 with 555
551 555
Rise time with Type K 14 ns 12 ns
Acceleration Voltage 10 kV 10 kV
Filament Regulation none saturable core reactor
Price in 1965
(2015 equiv.)
$1,850
($14,000)
$2,650
($20,100)
Indicator Weight 52 lb (23.6 kg) 68 lb (30.8 kg)
Power Supply Weight 42 lb (19 kg) 45 lb (20.4 kg)
Power Consumption 850 W 1050 W

Pictures