Toroid! Toroid! Toroid!
 

I recently bought several toroids, and unfortunately, one of them
dropped and broke in half.

Is it possible to super glue the thing back together? It's a clean break.

I was figuring that since toroid coils are often stacked, it would be
similar in effect.

- Mike KB3EIA -

On Tue, 18 May 2004 13:09:48 -0400, Mike Coslo wrote:
Is it possible to super glue the thing back together? It's a clean break.
Yes, split cores work quite well too.

Richard Clark wrote:
On Tue, 18 May 2004 13:09:48 -0400, Mike Coslo wrote:

Is it possible to super glue the thing back together? It's a clean break.

Yes, split cores work quite well too.

Ahh, Thanks Richard. I guess it's the ham in me, but I hate to waste
anything!


- Mike KB3EIA -

Mike Coslo wrote:

I recently bought several toroids, and unfortunately, one of them
dropped and broke in half.

Is it possible to super glue the thing back together? It's a clean
break.

I use a very tight tie wrap around the outside.
--
73, Cecil http://www.qsl.net/w5dxp



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On Tue, 18 May 2004 14:42:34 -0400, Mike Coslo wrote:

Richard Clark wrote:
On Tue, 18 May 2004 13:09:48 -0400, Mike Coslo wrote:

Is it possible to super glue the thing back together? It's a clean break.

Yes, split cores work quite well too.

Ahh, Thanks Richard. I guess it's the ham in me, but I hate to waste
anything!


- Mike KB3EIA -

Hi Mike,

The trick is to keep any gaps small. However, if I recall my
magnetics right, an air gap, although lowering the magnetic properties
(smaller inductance), also extends them (greater dynamic range, harder
to saturate). This is the principle behind a "swinging choke." This,
however, is not to say that it would offer any benefit to your
application. The reason I say this is because ferrites we use for
line chokes do not typically support enough flux to saturate in the
first place (or if they do, you have one hell of a problem); rather,
the ferrite characteristic of bulk resistance is employed and
inductance is a fairly trivial side benefit.

73's
Richard Clark, KB7QHC

What sort of toroids? If they're powdered iron, it should be no
problem. If they are relatively low mu ferrite, it should be a minor
problem at worst if you keep the glue line thin. If they are mu=6000
toroids, then a thousandth of an inch gap in an inch long path is
quite significant. If you relieved stresses, the break may not fit
back together with "zero" gap; it's something to check. A gap isn't
necessarily bad, just something to consider. In fact, gapped cores
can store more energy than ungapped.

Cheers,
Tom

Mike Coslo wrote in message ...
I recently bought several toroids, and unfortunately, one of them
dropped and broke in half.

Is it possible to super glue the thing back together? It's a clean break.

I was figuring that since toroid coils are often stacked, it would be
similar in effect.

- Mike KB3EIA -

YEP!!

Mike Coslo wrote:
I recently bought several toroids, and unfortunately, one of them
dropped and broke in half.

Is it possible to super glue the thing back together? It's a clean
break.

I was figuring that since toroid coils are often stacked, it would
be similar in effect.

- Mike KB3EIA -

Tom Bruhns wrote:
What sort of toroids? If they're powdered iron, it should be no
problem. If they are relatively low mu ferrite, it should be a minor
problem at worst if you keep the glue line thin.

They are the powedered iron type. I'll give it a shot, and see what
happens.


If they are mu=6000
toroids, then a thousandth of an inch gap in an inch long path is
quite significant. If you relieved stresses, the break may not fit
back together with "zero" gap; it's something to check. A gap isn't
necessarily bad, just something to consider. In fact, gapped cores
can store more energy than ungapped.


73, de Mike KB3EIA -

On Tue, 18 May 2004 22:58:15 GMT, Richard Clark
wrote:

On Tue, 18 May 2004 14:42:34 -0400, Mike Coslo wrote:

Richard Clark wrote:
On Tue, 18 May 2004 13:09:48 -0400, Mike Coslo wrote:

Is it possible to super glue the thing back together? It's a clean break.

Yes, split cores work quite well too.

Ahh, Thanks Richard. I guess it's the ham in me, but I hate to waste
anything!


- Mike KB3EIA -

Hi Mike,

The trick is to keep any gaps small. However, if I recall my
magnetics right, an air gap, although lowering the magnetic properties
(smaller inductance), also extends them (greater dynamic range, harder
to saturate). This is the principle behind a "swinging choke." This,
however, is not to say that it would offer any benefit to your
application. The reason I say this is because ferrites we use for
line chokes do not typically support enough flux to saturate in the
first place (or if they do, you have one hell of a problem); rather,
the ferrite characteristic of bulk resistance is employed and
inductance is a fairly trivial side benefit.

73's
Richard Clark, KB7QHC


Hi Richard,

Isn't it the other way around? If I recall a swinging choke does not
have a gap, which allows it to saturate sooner, changing the
inductance. A regular choke does have a gap. Speaking of stacked iron
plate type.


73
Gary K4FMX

On Wed, 19 May 2004 02:59:02 GMT, Gary Schafer
wrote:

On Tue, 18 May 2004 22:58:15 GMT, Richard Clark
wrote:

On Tue, 18 May 2004 14:42:34 -0400, Mike Coslo wrote:

Richard Clark wrote:
On Tue, 18 May 2004 13:09:48 -0400, Mike Coslo wrote:

Is it possible to super glue the thing back together? It's a clean break.

Yes, split cores work quite well too.

Ahh, Thanks Richard. I guess it's the ham in me, but I hate to waste
anything!


- Mike KB3EIA -

Hi Mike,

The trick is to keep any gaps small. However, if I recall my
magnetics right, an air gap, although lowering the magnetic properties
(smaller inductance), also extends them (greater dynamic range, harder
to saturate). This is the principle behind a "swinging choke." This,
however, is not to say that it would offer any benefit to your
application. The reason I say this is because ferrites we use for
line chokes do not typically support enough flux to saturate in the
first place (or if they do, you have one hell of a problem); rather,
the ferrite characteristic of bulk resistance is employed and
inductance is a fairly trivial side benefit.

73's
Richard Clark, KB7QHC


Hi Richard,

Isn't it the other way around? If I recall a swinging choke does not
have a gap, which allows it to saturate sooner, changing the
inductance. A regular choke does have a gap. Speaking of stacked iron
plate type.


73
Gary K4FMX

Hi Gary,

You are right, the description of effects is OK, but the naming is
backwards.

73's
Richard Clark, KB7QHC