2205: Difference between revisions

Latest revision as of 04:54, 8 January 2024

Tektronix 2205
20 MHz dual trace analog scope Tek 2205 Produced from 1989 to 1993 Manuals Tektronix 2205 Operators Manual (bad-OCR) Tektronix 2205 Service Manual (bad-OCR) 2205-40 manual needed (All manuals in PDF format unless noted otherwise)

Manuals – Specifications – Links – Pictures

The Tektronix 2205 is a 20 MHz dual-trace analog oscilloscope introduced in 1989. There is a also a 40 MHz version, the 2205-40.

Key Specifications

Bandwidth	20 MHz
CRT	1.8 kV cathode voltage, no post-deflection acceleration
Weight	6.2 kg (13.7 lb)
Power	max. 40 W

please expand

Prices

1990: $695 (~$1,600 in 2023 dollars)

Internals

Each of the two inputs first goes through attenuators, then discrete dual-JFET source-follower buffer stage, then an Intersil CA3102 differential amplifier chip to provide some gain and convert from single-ended to a differential signal.

The vertical output amplifier driving the CRT is discrete and has an interesting design that conserves power (and minimizes heat). When the output is slewing at low rates, the output transistors have a constant, relatively low current passing through them. At higher slew rates, to provide enough current to charge and discharge the parasitic and CRT plate capacitances, the output stage operates in more of a push-pull mode.

The 2205 has a switch-mode power supply that produces low voltage and CRT voltages using transformer T901, which operates at about 60 kHz. Interestingly, there is a also a mains-frequency step-down and isolation transformer (T901) in the power path before the SMPS.

Pictures

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@@ Line 1: / Line 1: @@
-The Tektronix 2205 is a 20MHz dual-trace analog oscilloscope.
+{{Oscilloscope Sidebar
+|manufacturer=Tektronix
+|series=2200-series scopes
+|model=2205
+|summary=20 MHz dual trace analog scope
+|image=Tek 2205 photo.jpg
+|caption=Tek 2205
+|introduced=1989
+|discontinued=1993
+|designers=
+|manuals=
+* [[Media:070-6717-00.pdf|Tektronix 2205 Operators Manual]] (bad-OCR)
+* [[Media:070-6716-00.pdf|Tektronix 2205 Service Manual]] (bad-OCR)
+* ''2205-40 manual needed [[Category:Manual needed]]''
+<!--
+* [http://w140.com/tek_2205.pdf Tektronix 2205 Service Manual (PDF)]
+* [http://w140.com/tek_2205_operators.pdf Tektronix 2205 Operators Manual (PDF)]
+-->
+}}
+The '''Tektronix 2205''' is a 20 MHz dual-trace analog oscilloscope [[introduced in 1989]]. There is a also a 40 MHz version, the '''2205-40'''.
+{{BeginSpecs}}
+{{Spec | Bandwidth | 20 MHz }}
+{{Spec | CRT | 1.8 kV cathode voltage, no post-deflection acceleration }}
+{{Spec | Weight | 6.2 kg (13.7 lb) }}
+{{Spec | Power | max. 40 W }}
+{{EndSpecs}}
+''please expand''
-Each of the two inputs first goes through attenuators,
+==Prices==
-then discrete dual-JFET source-follower buffer stage,
+* 1990: $695 (~$1,600 in 2023 dollars)
-then an Intersil CA3102 differential amplifier chip to provide
-some gain and convert from single-ended to a differential signal.
-The vertical output amplifier driving the CRT is discrete and has
-an interesting design that conserves power (and minimizes heat).
-When the output is slewing at low rates, the output transistors
-have a constant, relatively low current passing through them.
-At higher slew rates, to provide enough current to charge and
-discharge the parasitic and CRT plate capacitances, the output
-stage operates in more of a push-pull mode.
-The 2205 has a switch-mode power supply that produces low voltage
+==Internals==
-and CRT voltages using a T901, which operates at about 60kHz.
+Each of the two inputs first goes through attenuators, then discrete dual-JFET source-follower buffer stage, then an Intersil CA3102 differential amplifier chip to provide some gain and convert from single-ended to a differential signal.
-Interestingly, there is a also a mains-frequency
-isolation transformer (T901) in the power path before the SMPS.
-The 2205 has 1.8kV on the cathode and does not use post-deflection
+The vertical output amplifier driving the CRT is discrete and has an interesting design that conserves power (and minimizes heat).
-acceleration of the CRT electron beam.
+When the output is slewing at low rates, the output transistors have a constant, relatively low current passing through them.
+At higher slew rates, to provide enough current to charge and discharge the parasitic and CRT plate capacitances, the output stage operates in more of a push-pull mode.
-The 2205 weighs 13.7 pounds and consumes a maximum of 40 watts.
+The 2205 has a switch-mode power supply that produces low voltage and CRT voltages using transformer T901, which operates at about 60 kHz.
+Interestingly, there is a also a mains-frequency step-down and isolation transformer (T901) in the power path before the SMPS.
-* [http://w140.com/tek_2205.pdf Tektronix 2205 Service Manual (PDF)]
+==Pictures==
-* [http://w140.com/tek_2205_operators.pdf Tektronix 2205 Operators Manual (PDF)]
+<gallery>
+Tek 2205 e1.jpg
+Tek 2205 e2.jpg
+Tek 2205 e3.jpg
+Tek 2205 e4.jpg
+Tek 2205 e5.jpg
+Tek 2205 e6.jpg
+Tek 2205 e7.jpg
+Tek 2205 e8.jpg
+Tek 2205 e9.jpg
+Tek 2205 e10.jpg
+Tek 2205 trace.jpg
+Tek 2205 photo.jpg
+Tek 2205-40 1.jpg|2205-40
+Tek 2205-40 2.jpg|2205-40
+Tek 2205-40 3.jpg|2205-40
+Tek 2205-40 4.jpg|2205-40
+Tek 2205-40 5.jpg|2205-40
+Tek 2205-40 6.jpg|2205-40
+Tek 2205-40 7.jpg|2205-40
+Tek 2205-40 8.jpg|2205-40
+</gallery>
+[[Category:2200 series scopes]]