515: Difference between revisions

515 (view source)

11 bytes added , 27 May 2021

manual links changed to internal docs

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 ==Internals==
-The HV power supply uses three [[5642]] rectifiers to produce +2325 V for the CRT anode
+The HV power supply uses three [[5642]] rectifiers to produce +2,325 V for the CRT anode and −1,675 V for the CRT cathode.
-and -1675 V for the CRT cathode.  The LV power supply is linear, using a [[6080]] tube as
+The LV power supply is linear, using a [[6080]] tube as the pass tube of the series regulator for +300 V and +100 V supply.
-the pass tube of the series regulator for +300 V and +100 V supply.  The -150 V supply is
+The −150 V supply is regulated by a [[6AU5]] tube.  The voltage reference for the −150 V supply is a [[5651]] tube.
-regulated by a [[6AU5]] tube.  The voltage reference for the -150 V supply is a [[5651]]
-tube.  The 515 and 515A use [[selenium rectifiers]].  A kit was later made available
+The 515 and 515A use [[selenium rectifiers]].  A kit was later made availa blefor converting them to silicon rectifiers for improved reliability.
-for converting them to silicon rectifiers for improved reliability.
+Starting at serial number 4424, the 515A used the [[120-142]] power transformer, the same part that is used in the [[516]].
-Starting at serial number 4424, the 515A used the [[120-142]] power transformer,
-the same part that is used in the [[516]].
 The vertical amplifier is fully differential, DC-coupled, and all tube.  The stages are as follows: