32,950
edits
No edit summary |
No edit summary |
||
Line 1: | Line 1: | ||
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)] |