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Re: Newbe Info on Magnifiers
Tesla List wrote:
>
> Subscriber: smith-at-email.mannheim.army.mil Sun Jan 5 20:57:49 1997
> Date: Fri, 3 Jan 1997 22:47:29 +0000
> From: smith-at-email.mannheim.army.mil
> To: tesla-at-pupman-dot-com
> Subject: Newbe Info on Magnifiers
>
> All,
>
> I am going to attempt to construct a small magnifier
> system, but I had a some questions about design and construction.
> I have read that the driver secondary has fewer turns than the
> primary. Is this true? As far as I can gather, the tertiary coil is
> situated above the driver and is fed by one lead from the secondary
> while the other goes to ground. I have read posts about using
> copper tubing for the primary but what about the secondary? I am also
> assuming that the same enameled wire common to the secondary of most
> two coil sytems is used for the tertiary coil. Is this true? I also
> read that maggies work best off high break rates. I imagine its
> all a matter of tuning but generally spaeaking Are these rates
> significantly higher than those of a two coil system? Is the rest of
> the tank curcuit pretty much the same? Lastly (whew, beginers come
> up with all kinds of questions huh:-), when they say tap the primary,
> what are they tapping to? I have seen a million diagrams, all having
> slightly different designs. Can anyone help me on this? I've learned
> a ton in the short time I have been on the list but still have a long
> way to go...
>
> Thanks,
> Bryan
Bryan,
Magnifiers are tricky beasts and not for the novice. I hope that you
have built and tested about 4 Tesla coils of the regular type, made two
of three differrent gap systems, etc. A complete familiarity with the
regular old two coil system is a virtual right of passage to the
magnifier.
First of all the driver secondary always has more turns in it than the
primary. The wire size in the secondary should be much larger than that
of the tertiary-extra coil-resonator. The inductance of the secondry
driver coil should be a small fraction of that of the extra coil. 1/4th
to 1/10 as much.
When tapping a primary you are just tuning it! This usually is in the
form of a wire connecting the upper turns of the primary coil to the
primary tank components.
The secondary driver is always grounded at the base and the top turn is
carried off to the base of the extra coil which can be horizontally
removed a hundred feet or more and in a deep pit if necessary. The
position of the extra coil is rarely on top of the secondaary driver. As
a matter of fact it is best removed from the influence of the
primary/secondary system.
A magnifier is not just a Tesla coil with another coil attached.
Finally, the magnifier is coupled very tightly! Way beyond anything a
standard coil could withstand. (K=.4-.6). This demands an incredible gap
system which is far beyond the normal gapping required for the standard
table top Tesla coil system. A disucssion of gapping for magnifiers can
consume a full 2 hour video.
Good luck.
Richard Hull, TCBOR