05-06-2020, 10:06 AM
A bit of follow up on this.
Rather than altering the existing component layout I decided to just
renew faulty or significantly out of spec. passives.
In the event I replaced 9 capacitors (of which 3 are electrolytics), and
the mechanical vibrator with a solid-state substitute.
The resulting unloaded output is around 340V - when re-connected to
the radio I am expecting it to drop by a 100 or so volts.
The interesting issue is that the output from the rather strange extra
circuit (including the diode) is neg. 6V. Which rather fits the earlier suggestion
of a bias output.
Thanks to all,
Trevor.
Rather than altering the existing component layout I decided to just
renew faulty or significantly out of spec. passives.
In the event I replaced 9 capacitors (of which 3 are electrolytics), and
the mechanical vibrator with a solid-state substitute.
The resulting unloaded output is around 340V - when re-connected to
the radio I am expecting it to drop by a 100 or so volts.
The interesting issue is that the output from the rather strange extra
circuit (including the diode) is neg. 6V. Which rather fits the earlier suggestion
of a bias output.
Thanks to all,
Trevor.
