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The Tektronix Type 82 is a dual-trace plug-in for the [[585]] and 585A oscilloscopes.   
The Tektronix Type 82 is a dual-trace plug-in for the [[580-series scopes]].   
The Type 82 combined with a 585 or 585A provides a 4 nanosecond risetime.   
The Type 82 combined with a [[585]] or 585A provides a 4 nanosecond risetime.   
The front end of the Type 82 is a 7586 nuvistor cathode-follower, followed by bipolar diff-amps and diode channel switching, followed by a distributed output amplifier made of three 6DJ8 tubes,  
The front end of the Type 82 is a [[7586]] nuvistor cathode-follower,  
followed by bipolar diff-amps and diode channel switching,  
followed by a distributed output amplifier made of three [[6DJ8]] tubes,  
with differential 93-ohm outputs.  
with differential 93-ohm outputs.  
The use of a distributed amplifier in a plug-in is unusual.  Note that the 58x series differs from other 500-series scopes mainly in the fact the vertical signal interface between the plug-in and the mainframe is a low controlled impedance (93 ohms), as opposed to other 500-series scopes that present a high impedance to the plug-in.
The use of a distributed amplifier in a plug-in is unusual.   
Note that the 58x series differs from [[500-series scopes]] mainly in that
the vertical signal interface between the plug-in and the mainframe is  
a low controlled impedance (93 ohms), as opposed to other 500-series scopes  
that present a high impedance to the plug-in.


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Revision as of 05:44, 5 July 2010

The Tektronix Type 82 is a dual-trace plug-in for the 580-series scopes. The Type 82 combined with a 585 or 585A provides a 4 nanosecond risetime. The front end of the Type 82 is a 7586 nuvistor cathode-follower, followed by bipolar diff-amps and diode channel switching, followed by a distributed output amplifier made of three 6DJ8 tubes, with differential 93-ohm outputs. The use of a distributed amplifier in a plug-in is unusual. Note that the 58x series differs from 500-series scopes mainly in that the vertical signal interface between the plug-in and the mainframe is a low controlled impedance (93 ohms), as opposed to other 500-series scopes that present a high impedance to the plug-in.