23-01-2022, 04:35 PM
Just a bit of an update.
I have been working on the tag board that is mounted on the tube support at the rear of the chassis. The components are all at EHT potential.
This board had a hard life and was in a complete mess. There was components missing and some were sniped at one end. There was also strings of 1M resistors used instead of individual resistors.
I decided it was best to strip it and rebuild.
The capacitors were made from brown card. Which was printed on, sealed with french polish rolled up and then glued together with wood glue. hot melt glue was used to fill the ends.
I moulded and painted some dog bone resistors. Each one contains a 3.5 kV 0.5W resistor.
The yellow blob is a ceramic capacitor that was missing from the board. I could only find a surface mount type that had a high enough voltage rating. So I soldered on some wires to it and encapsulated it in hot melt.
Frank
I have been working on the tag board that is mounted on the tube support at the rear of the chassis. The components are all at EHT potential.
This board had a hard life and was in a complete mess. There was components missing and some were sniped at one end. There was also strings of 1M resistors used instead of individual resistors.
I decided it was best to strip it and rebuild.
The capacitors were made from brown card. Which was printed on, sealed with french polish rolled up and then glued together with wood glue. hot melt glue was used to fill the ends.
I moulded and painted some dog bone resistors. Each one contains a 3.5 kV 0.5W resistor.
The yellow blob is a ceramic capacitor that was missing from the board. I could only find a surface mount type that had a high enough voltage rating. So I soldered on some wires to it and encapsulated it in hot melt.
Frank
