The Tektronix Type 543 (rack mount RM43) is an all-tube 30 MHz scope introduced in 1958. It takes letter-series and 1-series plug-ins. It is similar to a 545, but without the second, delayed timebase. Instead, it has a range of horizontal magnifiers from ×2 to ×100.
While the 545 has two non-calibrated X-input sensitivities, the 543 has an X input with calibrated deflection sensitivity of 0.1 V/cm, 1 V/cm, or 10 V/cm.
|— 543 —|
|Bandwidth||DC to 30 MHz (≤ 3 dB) with Type K plug-in|
|Rise time||0.012 μs|
|Screen Area||4 cm × 10 cm|
|— 543B —|
|Bandwidth||DC to 33 MHz (≤ 3 dB) with Type 1A1 plug-in|
|Rise time||0.010 μs|
|Screen Area||6 cm × 10 cm|
|— all —|
|Line Voltage||108/115/122/216/230/244 VAC ±10%, selected via primary voltage selector and voltage range selector switches, 50 Hz to 60 Hz|
|Thermal Protection||Automatic resetting thermal cutout, in case internal temperature exceeds safe operating level|
|Power Consumption||530 W with Type CA plug-in|
|Trigger Modes||AC/DC/AC LF Reject, and HF Sync|
|Anode Potential||10 kV|
|Construction||Aluminum alloy chassis. Anodized front panel|
|Weight||27.8 kg (61.5 lbs)|
The 543B is a tube/transistor hybrid scope. The vertical amplifier has a 6DJ8 cathode follower stage followed by two transistor/tube cascode stages with a 186 Ω delay line in-between. The standard CRT for the 543B is part number 154-0478-00, also known as the T5470-31-2. There is a rackmount version, Type RM543B.
Question: Does a model 543A exist? Yes, but 543A specification are needed.
543 with D Plugin
543B with CA