Re: VTTC Horizonal coil

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "James by way of Terry Fritz <twftesla-at-qwest-dot-net>" <mustang3-at-cox-dot-net>

Hi Robert, all,
    The horizontal and vertical are the orientation of the secondary coils.
You were thinking of a TV receiver, and yes they use 60 Hz for the vertical
sweep and 15749.6 Hz(easy to remember 15,750) for the horizontal sweep.
    Both of the Tesla coils are basically the same circuit. The horizontal
coil runs at 93 KHz (48 in. long, 6.25 in. dia. wound #27). The vertical
coil runs at 128 KHz (27 in. long, 6.25 in. dia. wound #27). The tuning is
much easier on the vertical coil. As the H. coil sparks, this energy is
reflected into the tickler winding(grid). This makes the bias have spikes in
it. Its easy to tell when this is happening, (usually blows the rectifier)
the sound makes a sharp tick. The coil normally makes about a 5000 v.
negative pulse on the grids of the tubes. When these extra pulses show up,
sometimes they will be positive. This is bad, turns the tube on hard. Plates
get hot quick.
    I enjoy the toob coils, they can be run indoors, you can draw arcs to
various things your holding. It hurts to let it arc directly to you(arcs are
hot). Sometimes the arc will "load you up" and a spark(arc) will come off
your toe to ground. Hell of a hot foot. Barefoot is the best policy. This
way the charges will be dissipated into ground.

Later,

James
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Monday, June 24, 2002 8:51 AM
Subject: Re: VTTC Horizonal coil


> Original poster: "rheidlebaugh by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<rheidlebaugh-at-zialink-dot-com>
>
> James:The vertical and horizontal coils are made to operate at different
> frequencies on a picture TUBE. The vertical coil uses a 60 Hz sweep
> frequency and the horizontal coil sweeps at 18750 Hz. The higher frequency
> coil is smaller in size. This high frequency is also used to generate high
> voltage to supply the aquadag coating inside the TUBE. The red wire with
the
> rubber cap. This is 10 Kv or more as requirerd by the picture TUBE. The
> flyback circuit also has diodes to rectify and multiply the DC voltage.
The
> old flyback coils used a single diode and many turns of wire to produce
the
> neaded high voltage. Modern flyback coils have a series of diodes and
> capacitors to multiply the voltage. This makes the coil smaller and less
> costly to make. Since ths coil is a lower voltage the insulation required
is
> less. The current required is very low to produce a field charge so the
wire
> is very small. The vertical circuit is much less complex as it has no high
> voltage components, just sweep current at a lower frequency.
>      In a TC coil the primary coil is very high current because it has all
> ite current stored in the capacitor at the time of discharge. The
secondary
> coil has high voltage at very low current. In a VTTC circuit the primary
> current is much lower but the frequency is higher to compensate.
>   Robert  H
>
> > From: "Tesla list" <tesla-at-pupman-dot-com>
> > Date: Sun, 23 Jun 2002 22:24:13 -0600
> > To: tesla-at-pupman-dot-com
> > Subject: Re: VTTC Horizonal coil
> > Resent-From: tesla-at-pupman-dot-com
> > Resent-Date: Sun, 23 Jun 2002 22:26:22 -0600
> >
> > Original poster: "James by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> > <mustang3-at-cox-dot-net>
> >
> > Hi Ralph, all,
> > I have been wondering about the field on the horizontal coil. My theory
> > is that since the horiz coil is effectively shorted(the discharge rods
> > couple the energy back together as a spark). The field extends well out
on
> > the vertical toob coil. The horiz coil has a very limited field. Its
easy to
> > see the field with a florescent lamp. The vertical coil has the bottom
end
> > of the secondary grounded and the top end is radiating. I guess this is
the
> > main reason.
> >
> > later,
> >
> > James
> > ----- Original Message -----
> > From: "Tesla list" <tesla-at-pupman-dot-com>
> > To: <tesla-at-pupman-dot-com>
> > Sent: Sunday, June 23, 2002 2:00 PM
> > Subject: Re: VTTC Horizonal coil
> >
> >
> >> Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> > <Parpp807-at-aol-dot-com>
> >>
> >> In a message dated 6/22/02 9:59:31 PM Central Daylight Time,
> > tesla-at-pupman-dot-com
> >> writes:
> >>
> >>> The field on the horizontal coil
> >>> is not as strong as the vertical coil.
> >>
> >> Hi James,
> >>
> >> Why is there a difference in field strength from the vertical to the
> >> horizontal?
> >> Perhaps the difference is due to the mounting and support of the coil.
> >>
> >> Cheers,
> >> Ralph Zekelman
> >>
> >
>
>