502/Repairs: Difference between revisions

Line 15:

:'''Solution:''' Replace C180B-D

==Burned-out HV transformer==

:'''Symptom:''' HV transformer showing burns

:'''Root cause:''' overload by earlier V800 failure caused by leaky HV caps

:'''Solution:''' Replaced by 120-114 transformer (502) with 120-150 (from 502A) using only one cathode secondary. Note the grid winding has more turns on the 120-150, so a dropper resistor needs to be added to prevent the grid going too negative (no beam).

[[Category:Instrument repair reports]]

@@ Line 15: / Line 15: @@
 :'''Solution:''' Replace C180B-D
+==Burned-out HV transformer==
+:'''Symptom:''' HV transformer showing burns
+:'''Root cause:''' overload by earlier V800 failure caused by leaky HV caps
+:'''Solution:''' Replaced by 120-114 transformer (502) with 120-150 (from 502A) using only one cathode secondary.  Note the grid winding has more turns on the 120-150, so a dropper resistor needs to be added to prevent the grid going too negative (no beam).
 [[Category:Instrument repair reports]]

502/Repairs: Difference between revisions

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