Yes, the bigger current is in his description. Or do you not know the
differense between bigger and greatter?

What causes a coil to have more or less inductive kick?

I have been told that the circuit I have is overdamped. What does that
mean?

soo...@webtv.net wrote:
What causes a coil to have more or less inductive kick?

More or less inductance...Duh!

I have been told that the circuit I have is overdamped. What does that
mean?

Oh my! Well I was hoping not to get into this, but...

A magnetizer is basically a capacitor bank which is suddenly connected
to a coil to get a large pulse of current through it. Well, OK. You
should know that an inductor and a capacitor together make a tuned
circuit. In other words they can have some frequency it resonates at.
In other words when you fire the circuit it will "ring". This is BAD
because now the current in the coil is not just a one-way pulse but a
series of decreasing pulses that go in opposite directions. This tends
to undo the magnetizing job you just did!

So there are two ways to deal with this. One way is to use a diode to
soak up all the reverse energy. That way the current never reverses
(much!). Another way is to choose the Capacitor bank value and the
coil inductance value such that the tuned circuit is what is known as
"overdamped". Damping is a loss and hence has to do with both the
value of L (coil) and C (capacitor bank) and R the total resistance in
the circuit (coil, wires, SCR etc.).

As you increase the resistance, the "ringing" of the tuned circuit
lasts shorter and shorter. Eventually you reach a point where the
current in the tuned circuit no longer goes negative. That is called
"critical damping" Any more resistance and it's called "overdamped".
OK?

The caution here (and can of worms) is that simply changing the value
of the inductance of the coil can shift the circuit from over-damped
to under-damped in some cases. So simply putting on a larger coil
might create more trouble than you think! You can look up the formula
for critical damping if you wanted to predict what a larger coil would
do.

The easiest way is to just build the new coil and look for ringing
when you fire the device. (a small pickup loop and a scope should tell
you what the current is doing.) Use caution there is a LOT of current
pulsing in the coil!

Benj

I have used some coils with more resistance, and some coils with
less resistance than the coil I now use. They all work for me. I don't
have a scope to test them like you suggested. I put a small diode,
1N4007, across the coil, just to see if it would be destroyed. The
diode was not destroyed so I assumed the kickback was small. Some have
suggested using a diode as big as the SCR's volts and amps.

Autymn D. C. wrote:

Yes, the bigger current is in his description. Or do you not know the
differense between bigger and greatter?

Hey, Autyme Womyn,

You misspelled "greatter"?
Or don't you know the difference between one and two ts?

Benj

-------------------------

----------------------------
"Benj" <bjacoby@iwaynet.net> wrote in message
news:1180500058.690750.92700@q75g2000hsh.googlegroups.com...

Autymn D. C. wrote:

Yes, the bigger current is in his description. Or do you not know the
differense between bigger and greatter?

Hey, Autyme Womyn,

You misspelled "greatter"?
Or don't you know the difference between one and two ts?

Benj

-------------------------
Hi, Benj,

Autyme is in its (since I don't actually know its gender) own world -about
1000-1100 AD as far as language is concerned (-at least what it thinks it
was -likely just as incomprehensible to people of that time, if a time
machine dumped it back there.) Do you actually expect any technically
competent or sensible response from it?

Autyme should get the Stuckless Award for incomprehensibility.

Cheers,
--

Don Kelly dhky@shawcross.ca
remove the X to answer

Autymn D. C. wrote:

Yes, the bigger current is in his description. Or do you not know the
differense between bigger and greatter?

Hey, Autyme Womyn,

You misspelled "greatter"?
Or don't you know the difference between one and two ts?

Autymn D. C. wrote:
Yes, the bigger current is in his description. Or do you not know the
differense between bigger and greatter?

Hey, Autyme Womyn,

You misspelled "greatter"?
Or don't you know the difference between one and two ts?

Autymn D. C. wrote:

Yes, the bigger current is in his description. Or do you not know the
differense between bigger and greatter?

Hey, Autyme Womyn,

You misspelled "greatter"?
Or don't you know the difference between one and two ts?

Autymn D. C. wrote:
Yes, the bigger current is in his description. Or do you not know the
differense between bigger and greatter?

Hey, Autyme Womyn,

You misspelled "greatter"?
Or don't you know the difference between one and two ts?

Autymn D. C. wrote:
Yes, the bigger current is in his description. Or do you not know the
differense between bigger and greatter?

Hey, Autyme Womyn,

You misspelled "greatter"?
Or don't you know the difference between one and two ts?

Hi, Benj,

Autyme is in its (since I don't actually know its gender) own world -about
1000-1100 AD as far as language is concerned (-at least what it thinks it
was -likely just as incomprehensible to people of that time, if a time
machine dumped it back there.) Do you actually expect any technically
competent or sensible response from it?

Autyme should get the Stuckless Award for incomprehensibility.

There is no Autyme or Womyn or misspelling. You do not.
Posted four times

Getting back to my post about damping. The original coil in this
circuit was .001 ohms. It would be hard to have a coil with less
resistance. Any coil with more resistance would be overdamped and no
diode needed?

Don Kelly wrote:
Hi, Benj,

Autyme is in its (since I don't actually know its gender) own
world -about
1000-1100 AD as far as language is concerned (-at least what it thinks it
was -likely just as incomprehensible to people of that time, if a time
machine dumped it back there.) Do you actually expect any technically
competent or sensible response from it?

Actually no, I don't "expect" anything sensible from it. However, I
have noticed that at times it actually seems to comprehend the
discussions here and often responds with cryptic terms as you might
find in a glossary. However, at times its "unusual" thought patterns
(to put it more kindly) do provide a measure of inspiration to the
residents here. However there are no real solutions or information
provided, only "inspiration".

Autyme should get the Stuckless Award for incomprehensibility.

Yeah, but Autyme didn't invent this trick. It's often used by clueless
professors who falling short of total comprehension of a given subject
attempt a "snow job" on hapless students to cover the fact that they
really have no idea what they are talking about beyond the basic
terminology. Autyme is a lot like that.