Re: 6'' inch pipe, pvc, and losss at high Freq, was, is now VTTC, higher freq, verbose

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

Original poster: "colin.heath4 by way of Terry Fritz <teslalist-at-qwest-dot-net>" <colin.heath4-at-ntlworld-dot-com>

hi there,
             if you build a secondary out of pvc and a secondary out of
polypropylene or polyethylene i bet you wont notice any spark length
differance!
possibly you might be able to run for longer periods without so much heating
of the former but this would be very very extended periods.
cheers
colin

----- Original Message -----
From: Tesla list <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Saturday, July 19, 2003 2:24 PM
Subject: Fw: 6'' inch pipe, pvc, and losss at high Freq, was, is now VTTC,
higher freq, verbose


 > Original poster: "Jim Mora by way of Terry Fritz <teslalist-at-qwest-dot-net>"
<jmora-at-jetlink-dot-net>
 >
 >
 > Subject: 6'' inch pipe, pvc, and losss at high Freq, was, is now VTTC,
 > higher freq, verbose
 >
 >
 >  > Hello Ken, Captain, and Friends,
 >  >
 >  > Where I live So Cal, agriculture in a deasert drives much of this part
of
 > the State's economy.
 >  >
 >  > But let us speak to loss for a moment.. Ah, but those warehouses that
 > house
 >  > copious irrigation and irigation and drain pipe.... can drive a coiler
 > mad. At least this
 >  > one, as time allows. RQ was big on skin loss, esteemed R. Hull seemed
to
 > care
 >  > doodlely in his fabulous magnifiers. RQ still has me digging up the
yard
 > to
 >  > improve the ground plane to this day.
 >  >
 >  > Ha, Ha, they made big time sparks., regardless. Power systems, and I
guess
 >  > tuning, overcome the losses:-)
 >  >
 >  > My concern is that all loss is additive, and skin depth becomes more
the
 >  > issue at higher frequencies. Yes disruptive, is not such an issue,
however
 > VTTC or
 >  > STSC?
 >  >
 >  >  Basic question: is it the skin depth that effects the secondary losses
 > lessoned by
 >  > (poly coat)? But, what of the primary's? which always seems more
massive
 > for
 >  > no particular reason, or the primary insulations, PVC? Yea cheap.. what
is
 > the loss factor for few bucks?
 >  >
 >  > I am building a three 833a VTTC. I have both  3" and 4" polystyrene
coil
 >  > forms.
 >  >
 >  > After I got DR R's sync gap back and more cleanly machined (what a
wobble
 >  > dude:)), way forgiven...must have been a Friday lunch in Wisconsin, I
know
 > a few of those,
 >  > It seems pristine now ( the set screws could set a Muncie or a Spicer
main
 > shaft), bolted.on my
 >  > 8" coil, I want to experiment with the srsg, with Freau's phase
adjustable
 >  > phase, anyone experiment with these <sp> hysterisis motors in kind? I
hear
 > they
 >  > have more tongue..the pristine variac is a Powerstat 10a at 120...
anyone
 > want to calc the cap? Too bad one of >the mounting tabs broke in
 > shipping.:(  Dr. R's sync motor is either 1/20 HP or so.
 >  >
 >  > I have a month off work, imagine that...stuff to do and stuff to enjoy,
 > much
 >  > needed.
 >  >
 >  > What is the best coil primary coil form (opinions here) for a 4" VTTC,
 > #28, wound to 22" or so.
 >  > There be the primary to secondary K issue. Clearly, I have lots of pete
 > bottles
 >  > for standoff. It would be running in 400KC(still like that) me guesses.
 >  >
 >  > PE is hard to stick to, with small tubing CU tubing in Teflon. Is this
 > worth
 >  > the effort?
 >  >
 >  > I would love to hear from the esteemed Rzeszotarski, PH.D. re coupling
and
 >  > the K of the Grid coil feedback,  and the primary distance /
adjustments..
 > so that the
 >  > primary /secondary may be fully adjustable. I am willing to try several
 > coil
 >  > forms type/ sizes/ nylon threaded shafts to accomplish this tuning. I
have
 >  > Lots of parts and cap types, (mi Laser, Mica transmitter, Panasonic
pulse
 >  > polyies, and a cool Sangamo .003uf (only 8kv though, 12 a) , a few
 > traditional
 >  > transmitter Micas.. lots of MOV transformers. .. looking for a 4-5kv
1.5A
 > plate
 >  > or pig if ya got one collecting spiders to do a modulated full wave
later
 >  > maybe... Say, Jim Lux did you say you had some of these... we are
nearly
 >  > neighbors, but, alas that was awhile ago.
 >  >
 >  > I am acquiring a boat load of Variacs too, some vintage, which kick old
 >  > style butt ( way under- rated too:).
 >  >
 >  > This since I bought one of those newbies from off shore 20 amp.. Ha Ha,
 > the meter works
 >  > good. It adjusts my winder and lighting just fine, but then I do have
to
 >  > fiddle with the core screws, the wire gauge is wimpy too. This anin't
no
 >  > 11or 1256, but does the job for lessor things...
 >  >
 >  > Enough ranting , lets do talk about coil K at HF coupling, material
 > losses,
 >  > when we are not in the 12KVA range, and your thoughts and flames
(longer
 >  > sparks preferred).
 >  >I am particuly interested in the primay coil form....and conductor
 > material, the ideal K in solenoid for both tank and >feed back, and if
 > multiple coil forms are in order.
 >
 > Cheers:)) icy drink in big PE which sweats bigtime..good coil topper
though,
 > best to all..
 >  >
 >  > Jim Mora
 >  > Ojai, Ca.
 >  >
 >  >
 >  >
 >
 >