| Author |
Message |
tempus fugit
Guest
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 Posted:
Mon Nov 07, 2005 4:01 am Post subject:
those can type caps |
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Hey all;
You know those multi cap can style caps (in an aluminum or cardboard can)?
They usually have 2 or more tabs on the bottom and some twist type tabs to
hold the thing in. I'm assuming that the tabs on the bottom would be for
each + terminal of the cap(s) and one of them would be the (-) terminal. Is
this correct? Has anyone ever seen anything where the twist type tabs for
securing the cap are the ground and the tabs on the bottom are all + ends of
a cap? IOW, suppose there are 4 tabs on the bottom and 3 or 4 twist tabs to
secure it. Is it possible that there are 4 separate caps with each of those
tabs going to the + end of a cap?
THanks
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John Popelish
Guest
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| Posted:
Mon Nov 07, 2005 9:35 am Post subject:
Re: those can type caps |
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tempus fugit wrote:
| Quote: | Hey all;
You know those multi cap can style caps (in an aluminum or cardboard can)?
They usually have 2 or more tabs on the bottom and some twist type tabs to
hold the thing in. I'm assuming that the tabs on the bottom would be for
each + terminal of the cap(s) and one of them would be the (-) terminal. Is
this correct?
|
The caps in metal cans all use the can as a common negative, with each
of the other internal(to the outside ring) being separate positive
terminals of separate caps. The ones with cardboard tubes usually
have the common negative coming out as a black wire (sometimes from
the opposite end) with the other color coded leads that are the positives.
| Quote: | Has anyone ever seen anything where the twist type tabs for
securing the cap are the ground and the tabs on the bottom are all + ends of
a cap? IOW, suppose there are 4 tabs on the bottom and 3 or 4 twist tabs to
secure it. Is it possible that there are 4 separate caps with each of those
tabs going to the + end of a cap?
|
It is possible, but the can is usually stamped with the values
contained, and the symbol that is punched out of the phenolic wafer
where the positive terminals exit, to tell you which section is which.
One may have a square notch, one a triangle and one a half circle,
for instance.
Here are some examples of this type:
http://www.boiaudioworks.com/index.php?cPath=72_77
These multi section caps were about as common as dirt in the tube days. |
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tempus fugit
Guest
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| Posted:
Mon Nov 07, 2005 5:35 pm Post subject:
Re: those can type caps |
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|
Thanks John.
"John Popelish" <jpopelish@rica.net> wrote in message
news:UcKdnYd_kPJpUfPenZ2dnUVZ_v-dnZ2d@adelphia.com...
| Quote: | tempus fugit wrote:
Hey all;
You know those multi cap can style caps (in an aluminum or cardboard
can)?
They usually have 2 or more tabs on the bottom and some twist type tabs
to
hold the thing in. I'm assuming that the tabs on the bottom would be
for
each + terminal of the cap(s) and one of them would be the (-) terminal.
Is
this correct?
The caps in metal cans all use the can as a common negative, with each
of the other internal(to the outside ring) being separate positive
terminals of separate caps. The ones with cardboard tubes usually
have the common negative coming out as a black wire (sometimes from
the opposite end) with the other color coded leads that are the positives.
Has anyone ever seen anything where the twist type tabs for
securing the cap are the ground and the tabs on the bottom are all +
ends of
a cap? IOW, suppose there are 4 tabs on the bottom and 3 or 4 twist tabs
to
secure it. Is it possible that there are 4 separate caps with each of
those
tabs going to the + end of a cap?
It is possible, but the can is usually stamped with the values
contained, and the symbol that is punched out of the phenolic wafer
where the positive terminals exit, to tell you which section is which.
One may have a square notch, one a triangle and one a half circle,
for instance.
Here are some examples of this type:
http://www.boiaudioworks.com/index.php?cPath=72_77
These multi section caps were about as common as dirt in the tube days. |
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| Back to top |
|
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tempus fugit
Guest
|
| Posted:
Thu Nov 17, 2005 8:12 am Post subject:
Re: those can type caps |
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|
Hi John;
Just getting around to maybe relplacing a few caps. Is there any problem
with mounting a cap like the JJ500V 50+50 (near the bottom of the link you
sent me) on the outside of the chassis (as a replacement for and aluminum
can cap)?
Thanks
"John Popelish" <jpopelish@rica.net> wrote in message
news:UcKdnYd_kPJpUfPenZ2dnUVZ_v-dnZ2d@adelphia.com...
| Quote: | tempus fugit wrote:
Hey all;
You know those multi cap can style caps (in an aluminum or cardboard
can)?
They usually have 2 or more tabs on the bottom and some twist type tabs
to
hold the thing in. I'm assuming that the tabs on the bottom would be
for
each + terminal of the cap(s) and one of them would be the (-) terminal.
Is
this correct?
The caps in metal cans all use the can as a common negative, with each
of the other internal(to the outside ring) being separate positive
terminals of separate caps. The ones with cardboard tubes usually
have the common negative coming out as a black wire (sometimes from
the opposite end) with the other color coded leads that are the positives.
Has anyone ever seen anything where the twist type tabs for
securing the cap are the ground and the tabs on the bottom are all +
ends of
a cap? IOW, suppose there are 4 tabs on the bottom and 3 or 4 twist tabs
to
secure it. Is it possible that there are 4 separate caps with each of
those
tabs going to the + end of a cap?
It is possible, but the can is usually stamped with the values
contained, and the symbol that is punched out of the phenolic wafer
where the positive terminals exit, to tell you which section is which.
One may have a square notch, one a triangle and one a half circle,
for instance.
Here are some examples of this type:
http://www.boiaudioworks.com/index.php?cPath=72_77
These multi section caps were about as common as dirt in the tube days. |
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| Back to top |
|
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John Popelish
Guest
|
| Posted:
Thu Nov 17, 2005 5:35 pm Post subject:
Re: those can type caps |
|
|
tempus fugit wrote:
| Quote: | "John Popelish" <jpopelish@rica.net> wrote in message
(snip)
Here are some examples of this type:
http://www.boiaudioworks.com/index.php?cPath=72_77
These multi section caps were about as common as dirt in the tube days.
Just getting around to maybe relplacing a few caps. Is there any problem
with mounting a cap like the JJ500V 50+50 (near the bottom of the link you
sent me) on the outside of the chassis (as a replacement for and aluminum
can cap)?
|
I think it would work fine, as long as you can come up with a method
to clamp it in place. That one does not appear to be twist tab
mounted. I am assuming that both the chassis and the outside of the
capacitor are both at ground potential. |
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John Popelish
Guest
|
| Posted:
Fri Nov 18, 2005 1:35 am Post subject:
Re: those can type caps |
|
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tempus fugit wrote:
| Quote: | Thanks John.
There is a mounting clamp about midway down the page that looks like it
should be good for keeping it in place. I'm pretty sure that the chassis is
at ground, but I don't think it would matter using the clamp, would it?
|
I am just worrying about voltages you can touch, and if the cap case
and the chassis have to be isolated from each other. |
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tempus fugit
Guest
|
| Posted:
Fri Nov 18, 2005 1:35 am Post subject:
Re: those can type caps |
|
|
Thanks John.
There is a mounting clamp about midway down the page that looks like it
should be good for keeping it in place. I'm pretty sure that the chassis is
at ground, but I don't think it would matter using the clamp, would it?
"John Popelish" <jpopelish@rica.net> wrote in message
news:nrKdnVFcseW5COHeRVn-sA@adelphia.com...
| Quote: | tempus fugit wrote:
"John Popelish" <jpopelish@rica.net> wrote in message
(snip)
Here are some examples of this type:
http://www.boiaudioworks.com/index.php?cPath=72_77
These multi section caps were about as common as dirt in the tube days.
Just getting around to maybe relplacing a few caps. Is there any problem
with mounting a cap like the JJ500V 50+50 (near the bottom of the link
you
sent me) on the outside of the chassis (as a replacement for and
aluminum
can cap)?
I think it would work fine, as long as you can come up with a method
to clamp it in place. That one does not appear to be twist tab
mounted. I am assuming that both the chassis and the outside of the
capacitor are both at ground potential. |
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