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-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''
+==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.
-Each of the two inputs first goes through attenuators,
+The 2205 has a switch-mode power supply that produces low voltage and CRT voltages using transformer T901, which operates at about 60 kHz.
-then discrete dual-JFET source-follower buffer stage,
+Interestingly, there is a also a mains-frequency step-down and isolation transformer (T901) in the power path before the SMPS.
-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
+==Pictures==
-and CRT voltages using a T901, which operates at about 60kHz.
+<gallery>
-Interestingly, there is a also a mains-frequency
+Tek 2205 e1.jpg
-isolation transformer (T901) in the power path before the SMPS.
+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
-The 2205 weighs 13.7 pounds and consumes a maximum of 40 watts.
+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>
-* [http://w140.com/tek_2205.pdf Tektronix 2205 Service Manual (PDF)]
+[[Category:2200 series scopes]]
-* [http://w140.com/tek_2205_operators.pdf Tektronix 2205 Operators Manual (PDF)]