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Today's Topics:
1. Re: test (Chip Atkinson)
2. Idle Wire ID question (Paul B. Thompson)
3. Re: Idle Wire ID question (Derek, Extreme Electronics)
4. A table top Oudin Resonator (jeff_behary)
5. Good pic of Oudin Resonator... (jeff_behary)
6. Re: Resonate charging versus brute force. (Greg Leyh)
----------------------------------------------------------------------
Message: 1
Date: Sat, 28 Jun 2014 12:15:03 -0600 (MDT)
From: Chip Atkinson <chip@xxxxxxxxxx>
To: tesla@xxxxxxxxxx
Subject: Re: [TCML] test
Message-ID: <alpine.LRH.2.02.1406281214410.17667@xxxxxxxxxxxxxxxxxx>
Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed
Things should now be working.
Chip
On Sat, 28 Jun 2014, dave pierson wrote:
> test
>
> dwp
>
> _______________________________________________
> Tesla mailing list
> Tesla@xxxxxxxxxx
> http://www.pupman.com/mailman/listinfo/tesla
>
------------------------------
Message: 2
Date: Sat, 28 Jun 2014 15:02:11 -0400
From: "Paul B. Thompson" <mrapol@xxxxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Subject: [TCML] Idle Wire ID question
Message-ID: <7D557ACB37E344E78CB09DF53DBDF239@Number6>
Content-Type: text/plain; format=flowed; charset="UTF-8";
reply-type=original
I had reason to build a couple of small induction coils, and I ran
out of the 16 iron wire I usually use for the cores. While in a craft
store I found packaged length of wire made for artificial floral
arrangements. It was 18 gauge, so that was OK. I tested the wire with
a small magnet and it stuck, so I bought some. At home now I'm not
sure what I've got.
It's white metal, and rather soft. Seems like aluminum, but it is
attracted by magnets. I left a short piece wrapped up in soggy paper
towels for a day or two, but it didn't rust. If it weren't for the
magnetic response, I'd swear it's aluminum. Some alloy, I guess, what
is this stuff?
PS I made a core out of it; it works, but the magnetic field is
weaker than when I use iron wire . . .
PBT ------------------------------
Message: 3
Date: Sat, 28 Jun 2014 20:44:14 +0100
From: "Derek, Extreme Electronics" <tesla@xxxxxxxxxxxxxxxxxxxxxxxx>
To: tesla@xxxxxxxxxx
Subject: Re: [TCML] Idle Wire ID question
Message-ID: <53AF1B0E.8010102@xxxxxxxxxxxxxxxxxxxxxxxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Paul,
The florists wire I have here is galvanised steel.
That explains the magnetic attraction and reluctance to rust. It also
explains why it will allow many bends without fatigue like pure
aluminium.
Of course there may be numerous types of florists wire, I suspect I
know about as much about this, as the average florist knows about
magnetic induction.
Derek
On 28/06/2014 20:02, Paul B. Thompson wrote:
> I had reason to build a couple of small induction coils, and I ran
out > of the 16 iron wire I usually use for the cores. While in a
craft > store I found packaged length of wire made for artificial
floral > arrangements. It was 18 gauge, so that was OK. I tested the
wire with > a small magnet and it stuck, so I bought some. At home
now I'm not > sure what I've got.
>
> It's white metal, and rather soft. Seems like aluminum, but it is >
attracted by magnets. I left a short piece wrapped up in soggy paper
> towels for a day or two, but it didn't rust. If it weren't for the
> magnetic response, I'd swear it's aluminum. Some alloy, I guess,
what > is this stuff?
>
> PS I made a core out of it; it works, but the magnetic field is
weaker > than when I use iron wire . . .
>
> PBT
> _______________________________________________
> Tesla mailing list
> Tesla@xxxxxxxxxx
> http://www.pupman.com/mailman/listinfo/tesla
-- Web:www.extremeelectronics.co.uk <http://www.extremeelectronics.co.uk>
Twitter @ExtElec <https://twitter.com/ExtElec>
------------------------------
Message: 4
Date: Sun, 29 Jun 2014 07:32:31 -0400
From: jeff_behary <jeff_behary@xxxxxxxxxxx>
To: tesla@xxxxxxxxxx
Subject: [TCML] A table top Oudin Resonator
Message-ID: <BLU406-EAS22E6ED3A06199CEE3CB5629A050@xxxxxxx>
Content-Type: text/plain; charset="utf-8"
http://www.electrotherapymuseum.com/2014/AndyOudin/
Made for my friend Andy Barr, who has a Tesla museum / Barber Shop in IL.
Secondary Coil on a gylptal coated cardboard form 5.5" OD x 11" long
Wound with 185 turns of 16 AWG
Primary Coil 5 turns of 1" copper ribbon with .1875" EPDM rubber as
interleaves
4 series 1/8" tungsten spark gap
(2) 30kV .0027 mfd doorknob caps in parallel
15kV 30mA neon transformer.
Output is 6-7" brush with corona that can be felt 16" away. ?A fun
coil to interact with, pours out the Ozone. ?4 pages of pics in the
gallery, construction photos are on Facebook...
Jeff
Sent via the Samsung GALAXY S? 5, an AT&T 4G LTE smartphone
------------------------------
Message: 5
Date: Sun, 29 Jun 2014 08:46:57 -0400
From: jeff_behary <jeff_behary@xxxxxxxxxxx>
To: tesla@xxxxxxxxxx
Subject: [TCML] Good pic of Oudin Resonator...
Message-ID: <BLU406-EAS314EDE9DDE8F989BFFCE2289A050@xxxxxxx>
Content-Type: text/plain; charset="utf-8"
http://www.electrotherapymuseum.com/2014/AndyOudin/content/_6215797676_large.html
A good picture. ?Shows the corona well from a 185 turn secondary
coil, 16 AWG. ?If only the smell and prickly sensation could be
emailed...
Sent via the Samsung GALAXY S? 5, an AT&T 4G LTE smartphone
------------------------------
Message: 6
Date: Sat, 28 Jun 2014 21:08:26 -0700
From: Greg Leyh <lod@xxxxxxxxxxx>
To: tesla@xxxxxxxxxx
Subject: Re: [TCML] Resonate charging versus brute force.
Message-ID: <53AF913A.70203@xxxxxxxxxxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Hi Jim,
Suppose inductively ballasted and DC resonant charging are nearly the
same thing, except DC resonant charging puts the reactor on the HV
side and adds diodes to de-Q the charging and provide a 2x voltage
boost. Initially I was wondering why everyone was saying a huge
filter cap is required; perhaps that's just for single-phase
applications?
For three-phase DC supplies, no huge filter cap is needed. It's just
xfmr -> diodes -> reactor -> Cpri, and works very smoothly. Here's a
desc of my setup from, wow... 24 years ago:
http://lod.org/misc/Leyh/Papers/TCBA_GELeyh.pdf
The coil is still running with this original setup.
Electrum uses a similar DC resonant charging scheme.
Cheers,
Greg
> Message: 2
> Date: Tue, 24 Jun 2014 11:09:33 -0700
> From: "Jim Mora" <wavetuner@xxxxxxxxx>
> To: "'Carl'" <cn8@xxxxxxx>
> Cc: 'Tesla Coil Mailing List' <tesla@xxxxxxxxxx>
> Subject: Re: [TCML] Resonate charging versus brute force.
> Message-ID: <43C5625018CE494E8B673D8429B6BE52@JimonVista32>
> Content-Type: text/plain; charset="us-ascii"
>
> Thanks Carl and David,
>
> I have all the stuff to make a 12" Pig coil and just made a new rotary more
> geared to that supply. I have two giant 50KV 8uf capacitors for exploding
> piano wire. Frankly, I find them a little like snake charming a cobra with
> no anti-venom to fall back on. When the power is off, I like the HV to
> return to a safe zone in a reasonable time without huge power dissipation.
> Removing the energy from such caps is dangerous and intimidating to me. And
> they have a tendency to assure my neighbors that guy is truly nuts ;-^)
>
> I guess I'll pursue the path of least resistance and expense for now. The
> 12" form has been in my closet far too long!
>
> I also will pull the Raytheon 3P out of the tank to see how it
ticks but put
> resonance charging on the back burner for now.
>
> Thanks for helping me prioritize.
>
> Jim Mora
------------------------------
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End of Tesla Digest, Vol 80, Issue 22
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