5CT1N

Template:Plugin Sidebar 2 The Tektronix 5CT1N is a Curve Tracer Plug-in for the 5000 series oscilloscopes, similar to the 7CT1N for the 7000 series.

Key Specifications

DUT drive voltage (C-E)	positive (NPN or N channel) or negative (PNP or P channel) half-waves 7.5 V, 0.5 V/Div, 240 mA peak 30 V, 2 V/Div, 60 mA peak 75 V, 5 V/Div, 24 mA peak 300 V, 20 V/Div, 6 mA peak HV warning light on for > 50 V peak power 500 mW
DUT current display	10 μA/Div to 20 mA/Div, 1-2-5 steps (x 1 mode) 10 nA/Div to 20 μA/Div, 1-2-5 steps (x 1000 mode)
Base/Gate drive	0 to at least 10 steps dual polarity variable offset, at least +/- 5 steps current mode: 1 μA/Step to 1 mA/Step in 1-2-5 sequence voltage mode: 1 mV/Div to 1 V/Div in 1-2-5 sequence, 1 kΩ current limit
DUT connection	Three 4 mm jacks / binding posts

Pictures

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  5Ct1N in 5440 mainframe vertical bay, X output connected to time base X input

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  Displaying transistor curves

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Common Problems

C30 and C32 (100 μF, 25 V) have a tendency to leak or short, causing associated resistors R30 and R32 (240 Ω, 0.25 W, 5%) to overheat and fail. A good preventative maintenance procedure would be to replace these two capacitors with modern equivalents. Two 5CT1N units purchased online had this fault, and replacement of the capacitors and resistors restored proper operation.