Greetings,
Is it true if a cap has polarity before and after the tube that it is leaky and no good? I have one in a radio that is such and the others do not test that way.
Thank you,
Vinny

I also do not and can not find a schematic, and one cap could not be read?
any suggestions
Thank you,
Vinny

:Greetings,
:Is it true if a cap has polarity before and after the tube that it is leaky and no good? I have one in a radio that is such and the others do not test that way.
:Thank you,
:Vinny

:I also do not and can not find a schematic, and one cap could not be read?
:any suggestions
:Thank you,
:Vinny
:
::Greetings,
::Is it true if a cap has polarity before and after the tube that it is leaky and no good? I have one in a radio that is such and the others do not test that way.
::Thank you,
::Vinny

I found out the hard way about 10 years ago when I did not put in new capacitors...............

I'm confused here. What do you mean by "polarity before and after the tube"?
Doug

Doug, Before and after the cap, sorry.

:I'm confused here. What do you mean by "polarity before and after the tube"?
:Doug
:

:Doug, Before and after the cap, sorry.
:
:
What the heck does THAT mean?

"polarity before and after the cap"????? I don't understand what that means at all!

Must be new, NEW math or maybe new, NEW economics, but don't ask Wall St, they're still confused.

marv

::Doug, Before and after the cap, sorry.
::
::
:What the heck does THAT mean?
:
:"polarity before and after the cap"????? I don't understand what that means at all!

Vinny, the terminology is confusing us. Are you measuring voltages, possibly residual voltages after the radio's power is turned off? If so, where? (I'm grasping at straws here to try to understand your concern.)

"Polarity" applies to electrolytic caps. There is an anode (+) and cathode (-): they are built into the cap at the cap factory and are marked on the cap itself.
Doug

:Must be new, NEW math or maybe new, NEW economics, but don't ask Wall St, they're still confused.
:
:marv
:
:::Doug, Before and after the cap, sorry.
:::
:::
::What the heck does THAT mean?
::
::"polarity before and after the cap"????? I don't understand what that means at all!

Sorry everyone, I am a CT tech trying hard to become a radio restorer.
Let me try again: I guess I should measuring capicatance but I do not want to disconnect any thing at this preliminary stage with this canadian french radio. I have read that you should disconnect one side of the capacitor to check it. So I applied my meter from one side of the cap and to the other just using the polarity part of the meter to test for polarity.
So I was seeing if one side of the cap continues through the cap to the other side. What I was asking is if that should happen? (ie: should one side be connected to the other via the guts of the cap) I tried the other caps and there was no polarity. I know the rule of thumb is just to change the caps but these caps are pf and I downloaded the conversion chart and know that part of it. However, the voltage info on a couple of caps has a number 500/1500 volts= which is also confusing to me. Ultimately it was a mistake to receive this radio but what the hell, I'll give it a try.
Sorry,
Vinny

:Vinny, the terminology is confusing us. Are you measuring voltages, possibly residual voltages after the radio's power is turned off? If so, where? (I'm grasping at straws here to try to understand your concern.)
:
:"Polarity" applies to electrolytic caps. There is an anode (+) and cathode (-): they are built into the cap at the cap factory and are marked on the cap itself.
:Doug
:
:
::Must be new, NEW math or maybe new, NEW economics, but don't ask Wall St, they're still confused.
::
::marv
::
::::Doug, Before and after the cap, sorry.
::::
::::
:::What the heck does THAT mean?
:::
:::"polarity before and after the cap"????? I don't understand what that means at all!

Sorry, the word is continuity not polarized--lack of sleep.
Vinny

:Vinny, the terminology is confusing us. Are you measuring voltages, possibly residual voltages after the radio's power is turned off? If so, where? (I'm grasping at straws here to try to understand your concern.)
:
:"Polarity" applies to electrolytic caps. There is an anode (+) and cathode (-): they are built into the cap at the cap factory and are marked on the cap itself.
:Doug
:
:
::Must be new, NEW math or maybe new, NEW economics, but don't ask Wall St, they're still confused.
::
::marv
::
::::Doug, Before and after the cap, sorry.
::::
::::
:::What the heck does THAT mean?
:::
:::"polarity before and after the cap"????? I don't understand what that means at all!

Small value film caps should measure infinite resistance with an ohmmeter. But you have to lift one lead of the cap to get a valid measurement (unless, by inspection of the schematic, there is no component in parallel with the cap what would throw off the resistance measurement).
Doug

:Sorry, the word is continuity not polarized--lack of sleep.
:Vinny
:
:
:
::Vinny, the terminology is confusing us. Are you measuring voltages, possibly residual voltages after the radio's power is turned off? If so, where? (I'm grasping at straws here to try to understand your concern.)
::
::"Polarity" applies to electrolytic caps. There is an anode (+) and cathode (-): they are built into the cap at the cap factory and are marked on the cap itself.
::Doug
::
::

vinny,
Capacitors have one end called the anode and one end called the cathode and the two ends NEVER physically touch each other inside the capacitor. They just store up electrons like a battery with positive charged electrons on one side and negetive charged electrons on the other side. Reading accross them with your meter will give the the voltage stored in it and also determine which end is positive and which end is negative...nom

:Small value film caps should measure infinite resistance with an ohmmeter. But you have to lift one lead of the cap to get a valid measurement (unless, by inspection of the schematic, there is no component in parallel with the cap what would throw off the resistance measurement).
:Doug
:
::Sorry, the word is continuity not polarized--lack of sleep.
::Vinny
::
::
::
:::Vinny, the terminology is confusing us. Are you measuring voltages, possibly residual voltages after the radio's power is turned off? If so, where? (I'm grasping at straws here to try to understand your concern.)
:::
:::"Polarity" applies to electrolytic caps. There is an anode (+) and cathode (-): they are built into the cap at the cap factory and are marked on the cap itself.
:::Doug
:::
:::
:

:vinny,
:Electrolytic apacitors have one end called the anode and one end called the cathode and the two ends NEVER physically touch each other inside the capacitor. They just store up electrons like a battery with positive charged electrons on one side and negetive charged electrons on the other side. Reading accross them with your meter will give the the voltage stored in it and also determine which end is positive and which end is negative. Ceramic or 'non electrolytic' capacitors are not polarity sensitive, but they still will have a positve voltage on one side and a more negative voltage on the other. But they still never touch inside the capacitor...Neal
:
::Small value film caps should measure infinite resistance with an ohmmeter. But you have to lift one lead of the cap to get a valid measurement (unless, by inspection of the schematic, there is no component in parallel with the cap what would throw off the resistance measurement).
::Doug
::
:::Sorry, the word is continuity not polarized--lack of sleep.
:::Vinny
:::
:::
:::
::::Vinny, the terminology is confusing us. Are you measuring voltages, possibly residual voltages after the radio's power is turned off? If so, where? (I'm grasping at straws here to try to understand your concern.)
::::
::::"Polarity" applies to electrolytic caps. There is an anode (+) and cathode (-): they are built into the cap at the cap factory and are marked on the cap itself.
::::Doug
::::
::::
::

Vinny,

Are you referring to a coupling capacitor between two tube stages, plate of preceding tube to the grid of the next tube, having positive voltage on both sides of the capacitor?

Radiodoc
***************

:Doug, Before and after the cap, sorry.
:
:
::I'm confused here. What do you mean by "polarity before and after the tube"?
::Doug
::