Hello All, Edd,
I have solved the current draw problem on the 100 volt line. Now I have an arcing problem because I wasn't the greatest corona dope painter. I'll solve the problem and let everyone know when I'm starting to have fun looking at wave forms on this classic Oscilloscope.
This scope says 545A on its front panel but down to that last detail, it's a 545 with the factory rectifier upgrade chassis. It WAS interesting but now I'm at about the end of the restoration process.

Thanks,

Dave

Hi Dave,

That is good news.

Where is the arching? One thing to note is that if you replaced capacitors in the HV section be sure that your solder joints are rounded (ball solder joint) it the term I remember from by TV days. Sharp, pointed joints tend to arch.

Gary

:Hello All, Edd,
: I have solved the current draw problem on the 100 volt line. Now I have an arcing problem because I wasn't the greatest corona dope painter. I'll solve the problem and let everyone know when I'm starting to have fun looking at wave forms on this classic Oscilloscope.
: This scope says 545A on its front panel but down to that last detail, it's a 545 with the factory rectifier upgrade chassis. It WAS interesting but now I'm at about the end of the restoration process.
:
:Thanks,
:
:Dave
:

Gary,
These are in the final HV box with the 5 HV rectifier tubes. I replaced the capacitors in there and the connections are well inside the terminals. The terminals are covered with Corona Dope in as many places as I can see the arcing. I'm going to have to get back inside the box. Maybe there's a mark where the arcing was. I think I forgot to put the stuff on one of the places.

Dave
:
:Hi Dave,
:
:That is good news.
:
:Where is the arching? One thing to note is that if you replaced capacitors in the HV section be sure that your solder joints are rounded (ball solder joint) it the term I remember from by TV days. Sharp, pointed joints tend to arch.
:
:Gary
:
::Hello All, Edd,
:: I have solved the current draw problem on the 100 volt line. Now I have an arcing problem because I wasn't the greatest corona dope painter. I'll solve the problem and let everyone know when I'm starting to have fun looking at wave forms on this classic Oscilloscope.
:: This scope says 545A on its front panel but down to that last detail, it's a 545 with the factory rectifier upgrade chassis. It WAS interesting but now I'm at about the end of the restoration process.
::
::Thanks,
::
::Dave
::
:

Dave

I want to second what Gary said. May sound crazy but solder joints have to be rounded. If you have sharp points there will be arcing. Even if they are a long way from the chassis.

Norm

:Gary,
: These are in the final HV box with the 5 HV rectifier tubes. I replaced the capacitors in there and the connections are well inside the terminals. The terminals are covered with Corona Dope in as many places as I can see the arcing. I'm going to have to get back inside the box. Maybe there's a mark where the arcing was. I think I forgot to put the stuff on one of the places.
:
:Dave
::
::Hi Dave,
::
::That is good news.
::
::Where is the arching? One thing to note is that if you replaced capacitors in the HV section be sure that your solder joints are rounded (ball solder joint) it the term I remember from by TV days. Sharp, pointed joints tend to arch.
::
::Gary
::
:::Hello All, Edd,
::: I have solved the current draw problem on the 100 volt line. Now I have an arcing problem because I wasn't the greatest corona dope painter. I'll solve the problem and let everyone know when I'm starting to have fun looking at wave forms on this classic Oscilloscope.
::: This scope says 545A on its front panel but down to that last detail, it's a 545 with the factory rectifier upgrade chassis. It WAS interesting but now I'm at about the end of the restoration process.
:::
:::Thanks,
:::
:::Dave
:::
::
:

Norm, Gary,
I have to remove the Corona Dope and everything from that final terminal. One of the wires is sticking out too far on the side where I can't reach it. Everything has got to be inside that terminal with nothing sticking out. I'm sure it will be easy to pull the coronal dope back off so I can do this. I tried cutting the lead off but it's totally impossible to get my diagonal cutter in there on that side. The back of the scope is in the way and there doesn't seem to be any easy way to take that off. So the only way is to unsolder everything from that terminal and cut off the "offending" piece of wire. Then solder everything back in, in such a way that nothing sticks out of the other side of the terminal. Then it will probably work fine.

Thanks,

Dave

:Dave
:
: I want to second what Gary said. May sound crazy but solder joints have to be rounded. If you have sharp points there will be arcing. Even if they are a long way from the chassis.
:
:Norm
:
::Gary,
:: These are in the final HV box with the 5 HV rectifier tubes. I replaced the capacitors in there and the connections are well inside the terminals. The terminals are covered with Corona Dope in as many places as I can see the arcing. I'm going to have to get back inside the box. Maybe there's a mark where the arcing was. I think I forgot to put the stuff on one of the places.
::
::Dave
:::
:::Hi Dave,
:::
:::That is good news.
:::
:::Where is the arching? One thing to note is that if you replaced capacitors in the HV section be sure that your solder joints are rounded (ball solder joint) it the term I remember from by TV days. Sharp, pointed joints tend to arch.
:::
:::Gary
:::
::::Hello All, Edd,
:::: I have solved the current draw problem on the 100 volt line. Now I have an arcing problem because I wasn't the greatest corona dope painter. I'll solve the problem and let everyone know when I'm starting to have fun looking at wave forms on this classic Oscilloscope.
:::: This scope says 545A on its front panel but down to that last detail, it's a 545 with the factory rectifier upgrade chassis. It WAS interesting but now I'm at about the end of the restoration process.
::::
::::Thanks,
::::
::::Dave
::::
:::
::
:

Norm, Gary,
One of the capacitors somehow was too close to the back of the scope and was arcing to the back cover. I coated the end of the capacitor with Corona Dope and pushed it back under the final HV rectifier tube. I'm letting the corona dope dry and will try out the scope again later.

Thanks,

Dave
:Norm, Gary,
: I have to remove the Corona Dope and everything from that final terminal. One of the wires is sticking out too far on the side where I can't reach it. Everything has got to be inside that terminal with nothing sticking out. I'm sure it will be easy to pull the coronal dope back off so I can do this. I tried cutting the lead off but it's totally impossible to get my diagonal cutter in there on that side. The back of the scope is in the way and there doesn't seem to be any easy way to take that off. So the only way is to unsolder everything from that terminal and cut off the "offending" piece of wire. Then solder everything back in, in such a way that nothing sticks out of the other side of the terminal. Then it will probably work fine.
:
:Thanks,
:
:Dave
:
::Dave
::
:: I want to second what Gary said. May sound crazy but solder joints have to be rounded. If you have sharp points there will be arcing. Even if they are a long way from the chassis.
::
::Norm
::
:::Gary,
::: These are in the final HV box with the 5 HV rectifier tubes. I replaced the capacitors in there and the connections are well inside the terminals. The terminals are covered with Corona Dope in as many places as I can see the arcing. I'm going to have to get back inside the box. Maybe there's a mark where the arcing was. I think I forgot to put the stuff on one of the places.
:::
:::Dave
::::
::::Hi Dave,
::::
::::That is good news.
::::
::::Where is the arching? One thing to note is that if you replaced capacitors in the HV section be sure that your solder joints are rounded (ball solder joint) it the term I remember from by TV days. Sharp, pointed joints tend to arch.
::::
::::Gary
::::
:::::Hello All, Edd,
::::: I have solved the current draw problem on the 100 volt line. Now I have an arcing problem because I wasn't the greatest corona dope painter. I'll solve the problem and let everyone know when I'm starting to have fun looking at wave forms on this classic Oscilloscope.
::::: This scope says 545A on its front panel but down to that last detail, it's a 545 with the factory rectifier upgrade chassis. It WAS interesting but now I'm at about the end of the restoration process.
:::::
:::::Thanks,
:::::
:::::Dave
:::::
::::
:::
::
: