515: Difference between revisions

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The Tektronix 515 is a 15MHz single-trace all-tube oscilloscope.  It does not use plug-ins.
The Tektronix 515 is a 15MHz single-trace all-tube oscilloscope.  It does not use plug-ins.
A rackmount version, the RM15 was also sold.
A rackmount version, the RM15 was also sold. There is also a 515A. 
The HV power supply uses tree [[5642]] rectifiers to produce +2325V for the CRT anode
and -1675V for the CRT cathode.  The LV power supply is linear, using a [[6080]] tube as
the pass tube of the series regulator for +300V and +100V supply.  The -150V supply is
regulated by a [[6AU5]] tube.  The voltage reference for the -150V supply is a [[5651]]
tube.  The 515 and 515A use [[selenium rectifiers]].  A kit was later made available
for converting them to silicon rectifiers for improved reliability. 
 
The vertical amplifier is fully differential, DC-coupled, and all tube.  The
stages are as follows:
 
* input buffer, cathode followers, [[6AU6]]
* first gain stage, differential amplifier, T-coil, [[12BY7]]
* unity gain buffer, cathode follower, [[6DJ8]]
* output amplifier, differential amplifier, [[6CL6]]
 
The horizontal amplifier uses half of a [[6DJ8]] as a buffer, followed by a 6DJ8 as a
differential amplifier and phase splitter, followed by the two halves of another [[6DJ8]]
as the output cathode followers driving the horizontal CRT deflection plates.
 
The trigger is a 6DJ8 differential trigger amplifier followed by a 6DJ8 Schmitt trigger.
 
 


* [http://w140.com/mmm/tek-515.pdf Tektronix 515 Manual (PDF)]
* [http://w140.com/mmm/tek-515.pdf Tektronix 515 Manual (PDF)]

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