What do you call those fingerlings dancing from the top of your coil? At
60 Hz, powerline terminology uses brush discharge for mostly single
fingerlings, where positive voltage discharge is called plumes and are
larger, quite full, and feathery. This is used for US power lines up to 765
kV.
-----Original Message-----
From: Tesla [mailto:tesla-bounces@xxxxxxxxxx] On Behalf Of
tesla-request@xxxxxxxxxx
Sent: Tuesday, August 21, 2018 12:44 PM
To: tesla@xxxxxxxxxx
Subject: Tesla Digest, Vol 129, Issue 3
Send Tesla mailing list submissions to
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When replying, please edit your Subject line so it is more specific
than "Re: Contents of Tesla digest..."
Today's Topics:
1. Local NY Tesla Coil Group? (David Delman)
2. Re: Breaking the list silence (Gary Gaspar)
3. Re: Local NY Tesla Coil Group? (Yurtle Turtle)
4. Re: Local NY Tesla Coil Group? (Gary Gaspar)
5. Re: Breaking the list silence (Daniel Kunkel)
6. What to call "sparks"? (Steve White)
7. Re: What to call "sparks"? (Daniel Kunkel)
8. Volumn control ! (Albert)
9. Re: Breaking the list silence (Tedd Dillard)
10. Re: Breaking the list silence (Daniel Kunkel)
11. Re: Volumn control ! (jimlux)
12. Re: What to call "sparks"? (Gary Gaspar)
13. Suggestion for postings (Steve White)
14. Re: Volumn control ! (Tesla)
15. Re: What to call "sparks"? (Joseph Thorin)
16. Max Voltage Gain In a Tertiary Coil (Daniel Kunkel)
17. Ballast and control cabinet ready (Jan Ohlsson)
----------------------------------------------------------------------
Message: 1
Date: Sun, 19 Aug 2018 10:31:31 -0500
From: David Delman <doctordhd@xxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Subject: [TCML] Local NY Tesla Coil Group?
Message-ID:
<16552d00c38.2800.4632ab38b54b2f75a6798a0d049d9a3c@xxxxxxxxx>
Content-Type: text/plain; format=flowed; charset="us-ascii"
How can I find out if there is any Telsa Coil group or individuals in my
local area? Jericho, New York?
Thank you,
David Delman
------------------------------
Message: 2
Date: Sun, 19 Aug 2018 15:33:38 +0000 (UTC)
From: Gary Gaspar <majrombus@xxxxxxxxxxxxx>
To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
Subject: Re: [TCML] Breaking the list silence
Message-ID: <1174193714.10547367.1534692818647@xxxxxxxxxxxxxx>
Content-Type: text/plain; charset=UTF-8
I would not for very long to bad you do not have enough of the same 15/30 or
15/60. the two primaries in series is fine also. You draw the same power but
less amps because the voltage has doubled. for power lines at high voltage
means less big copper wires less amps same power.
On Saturday, August 18, 2018 6:00 PM, Daniel Kunkel
<dankunkel@xxxxxxxxx> wrote:
Well the list has been quiet lately, so I will break the silence!
I finally got my second TC up and running and getting some decent sparks. I
still need to do quite a bit of optimizing, but seeing 4 foot sparks,
smelling ozone, and hearing the crackle is a welcome change in my garage.
Video here: https://youtu.be/QvIcqximr_A
Right now the coil is running on a 15/60 and a 15/30 NSTs in parallel. I
have anther 15/30 that I want to add to the mix, but I am concerned about
amp draw. My needle is swinging past 20amps now (breaker did not trip), but
20a is a lot for a standard outlet. I need some PFC caps. Where is the best
place to get them?
I do have 240VAC in my garage, and I also seem to recall on old post by
Richard Quick stating you could run NST's from 240VAC if you put their
primaries in series. I am guessing this is great if you have two identical
NSTs. I wonder if it is possible to do this in a series/parallel gang for
my 15/60 and 15/30's (where it is 60ma on each hot side)?
Thanks,
~Dan
Kansas City area
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxxxxxxxxxx
https://www.pupman.com/mailman/listinfo/tesla
------------------------------
Message: 3
Date: Sun, 19 Aug 2018 16:27:48 +0000 (UTC)
From: Yurtle Turtle <yurtle_t@xxxxxxxxx>
To: tesla@xxxxxxxxxx
Subject: Re: [TCML] Local NY Tesla Coil Group?
Message-ID: <54559086.10588126.1534696068936@xxxxxxxxxxxxxx>
Content-Type: text/plain; charset=UTF-8
I'm sure it's dated, but search on pupman.com and there was a spreadsheet
created with names, locations, and other pertinent data. Dunno what search
terms to use, but I'd search for "database", "spreadsheet" "coilers" "list".
etc. It's out there.
On Sunday, August 19, 2018, 12:15:37 PM EDT, David Delman
<doctordhd@xxxxxxxxx> wrote:
How can I find out if there is any Telsa Coil group or individuals in my
local area? Jericho, New York?
Thank you,
David Delman
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxxxxxxxxxx
https://www.pupman.com/mailman/listinfo/tesla
------------------------------
Message: 4
Date: Sun, 19 Aug 2018 16:29:52 +0000 (UTC)
From: Gary Gaspar <majrombus@xxxxxxxxxxxxx>
To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
Subject: Re: [TCML] Local NY Tesla Coil Group?
Message-ID: <1008388098.10563856.1534696192615@xxxxxxxxxxxxxx>
Content-Type: text/plain; charset=UTF-8
The same Question but how about near Long Beach Calif or LAX
On Sunday, August 19, 2018 9:15 AM, David Delman <doctordhd@xxxxxxxxx>
wrote:
How can I find out if there is any Telsa Coil group or individuals in my
local area? Jericho, New York?
Thank you,
David Delman
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxxxxxxxxxx
https://www.pupman.com/mailman/listinfo/tesla
------------------------------
Message: 5
Date: Sun, 19 Aug 2018 19:51:53 -0500
From: Daniel Kunkel <dankunkel@xxxxxxxxx>
To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
Subject: Re: [TCML] Breaking the list silence
Message-ID:
<CAA7NYCfNBbgXpXezGRA+D_O9AkP-oQZZdzqccWco8n+w+Lnj3w@xxxxxxxxxxxxxx>
Content-Type: text/plain; charset="UTF-8"
Well it turns out I have an HVAC guy in my network. I have him a call and
he gave me some free caps out of his trusty 5 gallon bucket! I got 9 total,
of which 1 seems to be non-functional.
I did some bench testing and got some amazing results! I just shorted the
secondaries and tested amp draw.
The 15/60 nst drew 8.5 amps. With 177uF I got it down to .5 amps!
The paralleled 15/30s went down to .8 amps with 125uF. I'd add more, but
I'm out of caps. Seems like $8-10 per cap on eBay is the norm, which is
crazy to me.
I'm guessing once the transformers see the LC from the tank, they are going
to pull more than 1.3 amps! Is my method of bench testing in a dead short
and finding the lowest amp draw the correct method?
Here's a pic of my cap pack:
https://imgur.com/a/C5gcyHH
Thanks,
~Dan
Kansas City area
On Sun, Aug 19, 2018, 11:15 AM Gary Gaspar <majrombus@xxxxxxxxxxxxx> wrote:
> I would not for very long to bad you do not have enough of the same 15/30
> or 15/60. the two primaries in series is fine also. You draw the same
power
> but less amps because the voltage has doubled. for power lines at high
> voltage means less big copper wires less amps same power.
>
> On Saturday, August 18, 2018 6:00 PM, Daniel Kunkel <
> dankunkel@xxxxxxxxx> wrote:
>
>
> Well the list has been quiet lately, so I will break the silence!
>
> I finally got my second TC up and running and getting some decent sparks.
I
> still need to do quite a bit of optimizing, but seeing 4 foot sparks,
> smelling ozone, and hearing the crackle is a welcome change in my garage.
> Video here: https://youtu.be/QvIcqximr_A
>
> Right now the coil is running on a 15/60 and a 15/30 NSTs in parallel. I
> have anther 15/30 that I want to add to the mix, but I am concerned about
> amp draw. My needle is swinging past 20amps now (breaker did not trip),
but
> 20a is a lot for a standard outlet. I need some PFC caps. Where is the
best
> place to get them?
>
> I do have 240VAC in my garage, and I also seem to recall on old post by
> Richard Quick stating you could run NST's from 240VAC if you put their
> primaries in series. I am guessing this is great if you have two identical
> NSTs. I wonder if it is possible to do this in a series/parallel gang for
> my 15/60 and 15/30's (where it is 60ma on each hot side)?
>
> Thanks,
> ~Dan
> Kansas City area
> _______________________________________________
> Tesla mailing list
> Tesla@xxxxxxxxxxxxxxxxxx
> https://www.pupman.com/mailman/listinfo/tesla
>
>
>
> _______________________________________________
> Tesla mailing list
> Tesla@xxxxxxxxxxxxxxxxxx
> https://www.pupman.com/mailman/listinfo/tesla
>
------------------------------
Message: 6
Date: Sun, 19 Aug 2018 15:31:45 -0400 (EDT)
From: Steve White <steve.white1@xxxxxxxxx>
To: Tesla Coil List <tesla@xxxxxxxxxxxxxxxxxx>
Subject: [TCML] What to call "sparks"?
Message-ID:
<1191262479.603507093.1534707105189.JavaMail.zimbra@xxxxxxxxx>
Content-Type: text/plain; charset=utf-8
For years we have been referring to the output of tesla coils as sparks.
That term just doesn't seem to do it justice. To me, "spark" implies
something that is rather puny and periodic like the spark from your finger
caused by static electricity. I have been thinking about the various
different terminology that we could use. Here is my list of candidates:
1. Electrical discharges
2. Electrical emanations
3. Plasma streams
4, Lightning bolts
5. Sparks
My favorite is electrical discharges. Does anyone have a better term than
"spark"?
Steve White
Cedar Rapids, Iowa
------------------------------
Message: 7
Date: Sun, 19 Aug 2018 21:24:56 -0500
From: Daniel Kunkel <dankunkel@xxxxxxxxx>
To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
Subject: Re: [TCML] What to call "sparks"?
Message-ID:
<CAA7NYCc-TJzfzeM_vsz4av9UTJ2WwNRg_r0TKYbCxpS3gWnpHg@xxxxxxxxxxxxxx>
Content-Type: text/plain; charset="UTF-8"
Steve,
In the Colorado Springs Notes, Tesla refers to them as ?streamers?. In some
instances he would say "brush like discharges? (which I assume was aimed at
smaller discharges).
So I vote for 6. Streamer!
~Dan
Kansas City area
On Sun, Aug 19, 2018, 8:58 PM Steve White <steve.white1@xxxxxxxxx> wrote:
> For years we have been referring to the output of tesla coils as sparks.
> That term just doesn't seem to do it justice. To me, "spark" implies
> something that is rather puny and periodic like the spark from your finger
> caused by static electricity. I have been thinking about the various
> different terminology that we could use. Here is my list of candidates:
>
> 1. Electrical discharges
> 2. Electrical emanations
> 3. Plasma streams
> 4, Lightning bolts
> 5. Sparks
>
> My favorite is electrical discharges. Does anyone have a better term than
> "spark"?
>
> Steve White
> Cedar Rapids, Iowa
> _______________________________________________
> Tesla mailing list
> Tesla@xxxxxxxxxxxxxxxxxx
> https://www.pupman.com/mailman/listinfo/tesla
>
------------------------------
Message: 8
Date: Mon, 20 Aug 2018 15:47:59 +0100
From: Albert <Animation@xxxxxxxxxxxxxx>
To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
Subject: [TCML] Volumn control !
Message-ID: <bef98927-39cb-ffac-c7c6-7550fc701e87@xxxxxxxxxxxxxx>
Content-Type: text/plain; charset=utf-8; format=flowed
Is there any way to extract the volumn control info from
a Midi stream converted as an analogue signal?
I wish to use this to control the spark intensity volumns
of 2? SSTC's.
------------------------------
Message: 9
Date: Mon, 20 Aug 2018 10:10:47 -0400
From: Tedd Dillard <tedd.dillard@xxxxxxxxx>
To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
Subject: Re: [TCML] Breaking the list silence
Message-ID:
<CABebsSmRy6jukCGdVUs642ToMLmRqAGHqeqVy_ciNQyR+-s7_g@xxxxxxxxxxxxxx>
Content-Type: text/plain; charset="UTF-8"
I do not know very much about the subject of power factor correction so
this is likely too simple a view.
If the transformers are rated at 15,000 volts and either .03 or .06 amps
then it would seem that the correct input amps would be 3.75 or 7.5 amps at
120 volts.
In the present configuration one .03 and one .06 transformer would draw
11.25 amps and all three would draw 15 amps at max rated power.
So it would seem that is the amps you would be aimong to correct to.
Am I way off base?
Teddy
On Aug 18, 2018 9:00 PM, "Daniel Kunkel" <dankunkel@xxxxxxxxx> wrote:
> Well the list has been quiet lately, so I will break the silence!
>
> I finally got my second TC up and running and getting some decent sparks.
I
> still need to do quite a bit of optimizing, but seeing 4 foot sparks,
> smelling ozone, and hearing the crackle is a welcome change in my garage.
> Video here: https://youtu.be/QvIcqximr_A
>
> Right now the coil is running on a 15/60 and a 15/30 NSTs in parallel. I
> have anther 15/30 that I want to add to the mix, but I am concerned about
> amp draw. My needle is swinging past 20amps now (breaker did not trip),
but
> 20a is a lot for a standard outlet. I need some PFC caps. Where is the
best
> place to get them?
>
> I do have 240VAC in my garage, and I also seem to recall on old post by
> Richard Quick stating you could run NST's from 240VAC if you put their
> primaries in series. I am guessing this is great if you have two identical
> NSTs. I wonder if it is possible to do this in a series/parallel gang for
> my 15/60 and 15/30's (where it is 60ma on each hot side)?
>
> Thanks,
> ~Dan
> Kansas City area
> _______________________________________________
> Tesla mailing list
> Tesla@xxxxxxxxxxxxxxxxxx
> https://www.pupman.com/mailman/listinfo/tesla
>
------------------------------
Message: 10
Date: Mon, 20 Aug 2018 10:12:59 -0500
From: Daniel Kunkel <dankunkel@xxxxxxxxx>
To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
Subject: Re: [TCML] Breaking the list silence
Message-ID:
<CAA7NYCdcvQF7Xvs+1kCFn+_x3YuC54s6qoH70hVF-HE19Q0LEQ@xxxxxxxxxxxxxx>
Content-Type: text/plain; charset="UTF-8"
Tedd,
Yes that is my thinking too (regarding the amount draw). I am guessing the
pfc caps are forming a resonant circuit with the transformer's inductance
and the resonant rise is why the current is way over unity. So that's why
I'm asking if I am testing correctly. I really don't want to try my NSTs.
~Dan
Kansas City area
On Mon, Aug 20, 2018, 9:58 AM Tedd Dillard <tedd.dillard@xxxxxxxxx> wrote:
> I do not know very much about the subject of power factor correction so
> this is likely too simple a view.
> If the transformers are rated at 15,000 volts and either .03 or .06 amps
> then it would seem that the correct input amps would be 3.75 or 7.5 amps
at
> 120 volts.
> In the present configuration one .03 and one .06 transformer would draw
> 11.25 amps and all three would draw 15 amps at max rated power.
> So it would seem that is the amps you would be aimong to correct to.
> Am I way off base?
> Teddy
>
> On Aug 18, 2018 9:00 PM, "Daniel Kunkel" <dankunkel@xxxxxxxxx> wrote:
>
> > Well the list has been quiet lately, so I will break the silence!
> >
> > I finally got my second TC up and running and getting some decent
> sparks. I
> > still need to do quite a bit of optimizing, but seeing 4 foot sparks,
> > smelling ozone, and hearing the crackle is a welcome change in my
garage.
> > Video here: https://youtu.be/QvIcqximr_A
> >
> > Right now the coil is running on a 15/60 and a 15/30 NSTs in parallel. I
> > have anther 15/30 that I want to add to the mix, but I am concerned
about
> > amp draw. My needle is swinging past 20amps now (breaker did not trip),
> but
> > 20a is a lot for a standard outlet. I need some PFC caps. Where is the
> best
> > place to get them?
> >
> > I do have 240VAC in my garage, and I also seem to recall on old post by
> > Richard Quick stating you could run NST's from 240VAC if you put their
> > primaries in series. I am guessing this is great if you have two
> identical
> > NSTs. I wonder if it is possible to do this in a series/parallel gang
for
> > my 15/60 and 15/30's (where it is 60ma on each hot side)?
> >
> > Thanks,
> > ~Dan
> > Kansas City area
> > _______________________________________________
> > Tesla mailing list
> > Tesla@xxxxxxxxxxxxxxxxxx
> > https://www.pupman.com/mailman/listinfo/tesla
> >
> _______________________________________________
> Tesla mailing list
> Tesla@xxxxxxxxxxxxxxxxxx
> https://www.pupman.com/mailman/listinfo/tesla
>
------------------------------
Message: 11
Date: Mon, 20 Aug 2018 08:31:38 -0700
From: jimlux <jimlux@xxxxxxxxxxxxx>
To: Albert <Animation@xxxxxxxxxxxxxx>, Tesla Coil Mailing List
<tesla@xxxxxxxxxx>
Subject: Re: [TCML] Volumn control !
Message-ID: <f082da37-050f-9689-476e-46ba4748a616@xxxxxxxxxxxxx>
Content-Type: text/plain; charset=utf-8; format=flowed
On 8/20/18 7:47 AM, Albert via Tesla wrote:
> Is there any way to extract the volumn control info from
> a Midi stream converted as an analogue signal?
Sure - you could program something like an Arduino, Rpi, Beagle to
decode the MIDI stuff (there are off the shelf interfaces for this) and
extract the volume info
you can extract the velocity from the Note On messages
You might also want to intercept the Channel Mode message for "all sound
off" - 1011nnn
>
> I wish to use this to control the spark intensity volumns
> of 2? SSTC's.
>
> _______________________________________________
> Tesla mailing list
> Tesla@xxxxxxxxxxxxxxxxxx
> https://www.pupman.com/mailman/listinfo/tesla
------------------------------
Message: 12
Date: Mon, 20 Aug 2018 16:29:45 +0000 (UTC)
From: Gary Gaspar <majrombus@xxxxxxxxxxxxx>
To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
Subject: Re: [TCML] What to call "sparks"?
Message-ID: <184408282.11098980.1534782585712@xxxxxxxxxxxxxx>
Content-Type: text/plain; charset=UTF-8
A spark to me need to hit something. If it is not then I would call it a
corona discharge. But I like number 1. it works for me. I did the Arc Flash
training when I was working as a maintenance supervisor for Coca-Cola.?
On Sunday, August 19, 2018 9:26 PM, Daniel Kunkel <dankunkel@xxxxxxxxx>
wrote:
Steve,
In the Colorado Springs Notes, Tesla refers to them as ?streamers?. In some
instances he would say "brush like discharges? (which I assume was aimed at
smaller discharges).
So I vote for 6. Streamer!
~Dan
Kansas City area
On Sun, Aug 19, 2018, 8:58 PM Steve White <steve.white1@xxxxxxxxx> wrote:
> For years we have been referring to the output of tesla coils as sparks.
> That term just doesn't seem to do it justice. To me, "spark" implies
> something that is rather puny and periodic like the spark from your finger
> caused by static electricity. I have been thinking about the various
> different terminology that we could use. Here is my list of candidates:
>
> 1. Electrical discharges
> 2. Electrical emanations
> 3. Plasma streams
> 4, Lightning bolts
> 5. Sparks
>
> My favorite is electrical discharges. Does anyone have a better term than
> "spark"?
>
> Steve White
> Cedar Rapids, Iowa
> _______________________________________________
> Tesla mailing list
> Tesla@xxxxxxxxxxxxxxxxxx
> https://www.pupman.com/mailman/listinfo/tesla
>
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxxxxxxxxxx
https://www.pupman.com/mailman/listinfo/tesla
------------------------------
Message: 13
Date: Mon, 20 Aug 2018 11:11:54 -0400 (EDT)
From: Steve White <steve.white1@xxxxxxxxx>
To: Tesla Coil List <tesla@xxxxxxxxxxxxxxxxxx>
Subject: [TCML] Suggestion for postings
Message-ID:
<1730666686.605658691.1534777914209.JavaMail.zimbra@xxxxxxxxx>
Content-Type: text/plain; charset=utf-8
I have seen recently that people are wondering if there are fellow coilers
nearby. I often wonder this myself. To help with this, I propose the
following. When posting something, state your name, city, and state at the
end. Exact street address need not be posted. If people want to stay
anonymous, then I understand. I will be doing this on my future postings.
Steve White
Cedar Rapids, Iowa
------------------------------
Message: 14
Date: Mon, 20 Aug 2018 17:51:42 +0100
From: Tesla <tesla@xxxxxxxxxxxxxxxxxxxxxxxx>
To: Albert <Animation@xxxxxxxxxxxxxx>, Tesla Coil Mailing List
<tesla@xxxxxxxxxx>
Subject: Re: [TCML] Volumn control !
Message-ID:
<6092bc63-7526-f1aa-b603-fad7b2deb243@xxxxxxxxxxxxxxxxxxxxxxxx>
Content-Type: text/plain; charset=utf-8; format=flowed
Albert
It is relatively easy to extract the note "loudness" or intensity from
the midi stream. But I'm not sure what you mean by "converted as an
analogue signal".? If the midi has been converted to analogue, then it
is no longer MIDI. If the conversion was happening in real time, You
could drop out the note intensities as 0-127 values from the stream and
possibly convert these to a voltage whilst the conversion was happening.
Not too sure how you would account for polyphonic notes as these would
have an intensity for each note not an overall loudness.
Derek
On 20/08/2018 15:47, Albert via Tesla wrote:
> Is there any way to extract the volumn control info from
> a Midi stream converted as an analogue signal?
>
> I wish to use this to control the spark intensity volumns
> of 2? SSTC's.
>
> _______________________________________________
> Tesla mailing list
> Tesla@xxxxxxxxxxxxxxxxxx
> https://www.pupman.com/mailman/listinfo/tesla
------------------------------
Message: 15
Date: Mon, 20 Aug 2018 17:54:55 +0000 (UTC)
From: Joseph Thorin <wrcms@xxxxxxxxx>
To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
Subject: Re: [TCML] What to call "sparks"?
Message-ID: <220323642.10275685.1534787695819@xxxxxxxxxxxxxx>
Content-Type: text/plain; charset=UTF-8
I vote for ?Electrical Streamer? or just Streamer?
Chance Favours the Prepared Mind...
On Monday, August 20, 2018, 1:41 PM, Gary Gaspar <majrombus@xxxxxxxxxxxxx>
wrote:
A spark to me need to hit something. If it is not then I would call it a
corona discharge. But I like number 1. it works for me. I did the Arc Flash
training when I was working as a maintenance supervisor for Coca-Cola.?
? ? On Sunday, August 19, 2018 9:26 PM, Daniel Kunkel <dankunkel@xxxxxxxxx>
wrote:
Steve,
In the Colorado Springs Notes, Tesla refers to them as ?streamers?. In some
instances he would say "brush like discharges? (which I assume was aimed at
smaller discharges).
So I vote for 6. Streamer!
~Dan
Kansas City area
On Sun, Aug 19, 2018, 8:58 PM Steve White <steve.white1@xxxxxxxxx> wrote:
> For years we have been referring to the output of tesla coils as sparks.
> That term just doesn't seem to do it justice. To me, "spark" implies
> something that is rather puny and periodic like the spark from your finger
> caused by static electricity. I have been thinking about the various
> different terminology that we could use. Here is my list of candidates:
>
> 1. Electrical discharges
> 2. Electrical emanations
> 3. Plasma streams
> 4, Lightning bolts
> 5. Sparks
>
> My favorite is electrical discharges. Does anyone have a better term than
> "spark"?
>
> Steve White
> Cedar Rapids, Iowa
> _______________________________________________
> Tesla mailing list
> Tesla@xxxxxxxxxxxxxxxxxx
> https://www.pupman.com/mailman/listinfo/tesla
>
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxxxxxxxxxx
https://www.pupman.com/mailman/listinfo/tesla
?
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxxxxxxxxxx
https://www.pupman.com/mailman/listinfo/tesla
------------------------------
Message: 16
Date: Mon, 20 Aug 2018 23:12:01 -0500
From: Daniel Kunkel <dankunkel@xxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: [TCML] Max Voltage Gain In a Tertiary Coil
Message-ID:
<CAA7NYCcZ8ZbC2eMEwpeKBxyeqj=9dxdxpcGxfN36XngMG7mevw@xxxxxxxxxxxxxx>
Content-Type: text/plain; charset="UTF-8"
When thinking about a 3 coil system, where the third coil is free to
resonate, what is the best way to maximize the voltage gain?
If we follow the Colorado Springs oscillator, we would use coils with an
aspect ratio of 1:1 with a large space between the winding. IIRC the space
winding Tesla did was to reduce inter-turn arcing (due to the poor
insulation qualities of the gutta-percha insulation), as well as an attempt
to reduce the self capacitance of the coil.
So as best I can theorize, you should:
-Identify what inductance and top load you need to achieve the desired
frequency
Then:
-minimize the self capacitance of the coil
-minimize the DC ohms of the coil
So to that end, are they any easy to use and accurate calculators that are
available? JavaTC I believe is accurate, but the user interface is lacking
and not really easy to make these changes to aspect ratio, wire diameter,
and spacing easy or quick. DeepFriedNeon is great, but I am unsure of its
accuracy.
~Dan
Kansas City area
------------------------------
Message: 17
Date: Tue, 21 Aug 2018 18:11:28 +0200
From: "Jan Ohlsson" <jan@xxxxxxxx>
To: <tesla@xxxxxxxxxxxxxxxxxx>
Subject: [TCML] Ballast and control cabinet ready
Message-ID: <01f201d43969$9e0b5880$da220980$@eneby.nu>
Content-Type: text/plain; charset="iso-8859-1"
Hi,
I asked for advice a while ago, and now I have finished the control cabinet
and the ballast. Here are a few pictures:
https://photos.app.goo.gl/1veXfqtzqGanxEWm9
The ballast core weighs 110 kg, double the weight of the HV-transformer
core. I wanted a ballast that can?t saturate, it has an air gap of 2*10 mm.
A rotary switch in the cabinet shifts the current from 10 to 40 amps at 400
V. To limit the inrush current I have NTC-resistors, but it seems like the
ballast starts very softly anyway, I could start it with shorted output,
tapped for 16 amps, on a 10 amp fuse, so the inrush current seems very
reasonable. I have no variac, so a soft start is important.
To test the HV-transformer I used a Jacob?s ladder with about 35 amps at 400
V to the transformer primary. The JL was not very successful, it arced
internally in the plywood base, and I think the initial gap was to tight, so
that the arc reignited there before it had climbed very far. I also scared
myself when a tape holder, placed on top of the control cabinet, fell
suddenly to the floor from the ballast vibrations. There is a short video of
that incident among the pictures.
The HV-transformer has very low idle current draw, it was hard to measure
with my clip on type ammeter. It is less than a few hundred milliamps,
anyway. The tank leaked some oil at the gaskets to the LV and HV terminals,
the rubber gaskets had set a bit, so I had to retighten the bolts. As I lost
a couple of liters of oil, the oil level is now below one of the HV leads
above the transformer core. I have to refill that, I don?t want a power arc
inside the tank.
Next I will start with the rotary gap. I have a VFD unit in the cabinet,
which I hope will hold up to the TC environment. And in a distant future,
perhaps I will come to start with the TC itself...
Moving forward, but slowly...
Jan
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End of Tesla Digest, Vol 129, Issue 3
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