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tech / sci.electronics.design / Re: For the beginners ? here a bit of electronics theory

SubjectAuthor
* For the beginners ? here a bit of electronics theoryJan Panteltje
+* Re: For the beginners ? here a bit of electronics theoryJohn Larkin
|+* Re: For the beginners ? here a bit of electronics theoryJan Panteltje
||+- Re: For the beginners ? here a bit of electronics theoryamdx
||`* Re: For the beginners ? here a bit of electronics theoryJohn Larkin
|| `* Re: For the beginners ? here a bit of electronics theoryJan Panteltje
||  `* Re: For the beginners ? here a bit of electronics theoryJohn Larkin
||   `* Re: For the beginners ? here a bit of electronics theoryJan Panteltje
||    `* Re: For the beginners ? here a bit of electronics theoryJohn Larkin
||     `* Re: For the beginners ? here a bit of electronics theoryJan Panteltje
||      `* Re: For the beginners ? here a bit of electronics theoryJohn Larkin
||       +- Re: For the beginners ? here a bit of electronics theoryJan Panteltje
||       `* Re: For the beginners ? here a bit of electronics theoryJan Panteltje
||        +* Re: For the beginners ? here a bit of electronics theoryDon
||        |`* Re: For the beginners ? here a bit of electronics theoryJan Panteltje
||        | `- Re: For the beginners ? here a bit of electronics theoryClifford Heath
||        `* Re: For the beginners ? here a bit of electronics theoryJasen Betts
||         `- Re: For the beginners ? here a bit of electronics theoryJan Panteltje
|`* Re: For the beginners ? here a bit of electronics theorybitrex
| +- Re: For the beginners ? here a bit of electronics theoryJohn Larkin
| `* Re: For the beginners ? here a bit of electronics theoryJan Panteltje
|  `* Re: For the beginners ? here a bit of electronics theoryJohn Larkin
|   +* Re: For the beginners ? here a bit of electronics theoryJan Panteltje
|   |`- Re: For the beginners ? here a bit of electronics theoryJohn Larkin
|   `* Re: For the beginners ? here a bit of electronics theorypiglet
|    +* Re: For the beginners ? here a bit of electronics theoryDecadentLinuxUserNumeroUno
|    |+- Re: For the beginners ? here a bit of electronics theorypiglet
|    |`* Re: For the beginners ? here a bit of electronics theoryJohn Larkin
|    | `* Re: For the beginners ? here a bit of electronics theoryPhil Hobbs
|    |  +* Re: For the beginners ? here a bit of electronics theoryJeroen Belleman
|    |  |+- Re: For the beginners ? here a bit of electronics theoryJohn Larkin
|    |  |`- Re: For the beginners ? here a bit of electronics theoryPhil Hobbs
|    |  `* Re: For the beginners ? here a bit of electronics theoryDecadentLinuxUserNumeroUno
|    |   `* Re: For the beginners ? here a bit of electronics theoryPhil Hobbs
|    |    `* Re: For the beginners ? here a bit of electronics theorypiglet
|    |     `- Re: For the beginners ? here a bit of electronics theoryPhil Hobbs
|    +- Re: For the beginners ? here a bit of electronics theorypiglet
|    `- Re: For the beginners ? here a bit of electronics theoryJohn Larkin
+- Re: For the beginners ? here a bit of electronics theoryDecadentLinuxUserNumeroUno
`- Re: For the beginners ? here a bit of electronics theoryFred Bloggs

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Re: For the beginners ? here a bit of electronics theory

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From: jlar...@highlandSNIPMEtechnology.com (John Larkin)
Newsgroups: sci.electronics.design
Subject: Re: For the beginners ? here a bit of electronics theory
Date: Wed, 12 Oct 2022 06:58:08 -0700
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 by: John Larkin - Wed, 12 Oct 2022 13:58 UTC

On Wed, 12 Oct 2022 09:50:05 -0000 (UTC),
DecadentLinuxUserNumeroUno@decadence.org wrote:

>piglet <erichpwagner@hotmail.com> wrote in
>news:ti5uj9$1dsan$1@dont-email.me:
>
>> On 12/10/2022 6:28 am, Anthony William Sloman wrote:
>>>
>>> You don't add an extra inductor.
>>>
>>
>> Except when it makes sense to explicitly add the leakage for
>> simulation. A recent example I had was a three winding transformer
>> where two windings are bifilar very closely coupled but the third
>> winding is loosely coupled (because of HV clearances).
>>
>> piglet
>>
>>
>
>"coupling" is via the core. Volts per turn does not change because you
>spaced the HV winding out a bit.

But leakage inductance does.

I'd guess that the old TV flyback transformers had a bunch of leakage
L. They sure skimped on ferrite.

Re: For the beginners ? here a bit of electronics theory

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From: jlar...@highlandSNIPMEtechnology.com (John Larkin)
Newsgroups: sci.electronics.design
Subject: Re: For the beginners ? here a bit of electronics theory
Date: Wed, 12 Oct 2022 06:59:43 -0700
Organization: Highland Tech
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 by: John Larkin - Wed, 12 Oct 2022 13:59 UTC

On Wed, 12 Oct 2022 05:56:29 GMT, Jan Panteltje
<pNaOnStPeAlMtje@yahoo.com> wrote:

>On a sunny day (Tue, 11 Oct 2022 22:05:11 -0700) it happened John Larkin
><jlarkin@highlandSNIPMEtechnology.com> wrote in
><njickhtm3f84iivphu2r8dcd1e4vjskt6a@4ax.com>:
>
>>On Wed, 12 Oct 2022 04:47:29 GMT, Jan Panteltje
>><pNaonStpealmtje@yahoo.com> wrote:
>>
>>>On a sunny day (Tue, 11 Oct 2022 12:44:07 -0400) it happened bitrex
>>><user@example.net> wrote in <r3h1L.115010$tRy7.76841@fx36.iad>:
>>>
>>>>On 10/9/2022 6:12 AM, John Larkin wrote:
>>>>> On Sun, 09 Oct 2022 08:03:46 GMT, Jan Panteltje
>>>>> <pNaonStpealmtje@yahoo.com> wrote:
>>>>>
>>>>>> How to overcome the limits of boost converters:
>>>>>>
>>>>>>
>>>>>> https://www.electronicdesign.com/power-management/whitepaper/21252189/analog-devices-how-to-overcome-the-limits-of-boost-converters
>>>>>>
>>>>>> This brings me back to designing TV horizontal output transformers and HV circuits...
>>>>>>
>>>>>> Maybe be y'r tesla will run faster...
>>>>>>
>>>>>> ?
>>>>>>
>>>>>> But anyways, nice article, but nothing like designing and building one yourself and finding out.
>>>>>
>>>>>
>>>>> He jumps to "in conclusion" too soon. There's capacitances to worry
>>>>> about, and inductor saturation.
>>>>>
>>>>> I like to use a dual-winding inductor, like the DRQ series, and build
>>>>> an autotransformer boost converter, which helps get high output
>>>>> voltage.
>>>>>
>>>>
>>>>The article this is from calls this dual-winding inductor boost topology
>>>>"novel" but I find it hard to believe it's that novel:
>>>>
>>>><https://html.scirp.org/file/2-1770466x10.png>
>>>
>>>Just the secundary power in series, nothing new,
>>>But why LK2? Not really needed.. same for LK1 if it is not coupled to anything, or is that the 'new' part?
>>>
>>
>>They probably represent the leakage inductances in a simulation.
>
>Would here be a market for that: 'leakage inductors' ? ;-)
>I mean targeting simulations using designers.... "do
>not forget the leakage inductors!" sort of commercial..
>hehe
>
>World upside down...
>
>

Mouser could sell leakage inductors, back-ordered to September 2023.

Re: For the beginners ? here a bit of electronics theory

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Subject: Re: For the beginners ? here a bit of electronics theory
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From: pcdhSpam...@electrooptical.net (Phil Hobbs)
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 by: Phil Hobbs - Wed, 12 Oct 2022 14:53 UTC

John Larkin wrote:
> On Wed, 12 Oct 2022 09:50:05 -0000 (UTC),
> DecadentLinuxUserNumeroUno@decadence.org wrote:
>
>> piglet <erichpwagner@hotmail.com> wrote in
>> news:ti5uj9$1dsan$1@dont-email.me:
>>
>>> On 12/10/2022 6:28 am, Anthony William Sloman wrote:
>>>>
>>>> You don't add an extra inductor.
>>>>
>>>
>>> Except when it makes sense to explicitly add the leakage for
>>> simulation. A recent example I had was a three winding transformer
>>> where two windings are bifilar very closely coupled but the third
>>> winding is loosely coupled (because of HV clearances).
>>>
>>> piglet
>>>
>>>
>>
>> "coupling" is via the core. Volts per turn does not change because you
>> spaced the HV winding out a bit.
>
> But leakage inductance does.
>
> I'd guess that the old TV flyback transformers had a bunch of leakage
> L. They sure skimped on ferrite.
>
>
>
You need leakage inductance in a flyback. Most of the energy is stored
in the air gap.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510

http://electrooptical.net
http://hobbs-eo.com

Re: For the beginners ? here a bit of electronics theory

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From: g...@crcomp.net (Don)
Newsgroups: sci.electronics.design
Subject: Re: For the beginners ? here a bit of electronics theory
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 by: Don - Wed, 12 Oct 2022 15:12 UTC

Jan Panteltje wrote:
> John Larkin wrote:
>> Jan Panteltje wrote:
>>>
>>>I have the distinct impression current civilization is sort of stuck
>>>
>>>or moving backward, I see things here done bad that would not have happened
>>>that way in the seventies... carelessness or incompetence...
>>>you are lucky if you have competent people working for you,
>>>hard to find any here these days it seems.
>>
>>I blame Microsoft.
>
> Indeed!!!
> I got email from my US website hosting company 'godaddy' that as of
> tomorrow they no longer support pop email,
> and move every email related thing to Microsoft, as 'everybody has a
> smartphone anyways'.
> I phoned them, after 3 attempts I got a real person on the line
> he told me it was for 'security reasons'...
> Well Linux has done better at that .., and no pop email makes life
> difficult as everything is automatically scripted
> and organized here.
> Told the guy tell your boss I do not like it.
> Just found a local web hosting company and will be moving everything
> there,Godaddy sucks now.
> There will probably be a 'panteltje.net' for test and if that works OK
> I will move panteltje,com there too.
> So, an other US company shoots itself in the foot, loses me as customer
> after 25 years!!! by going Microsoft.

There's the right way, the wrong way, and the Microsoft way. Microsoft
bets on a perpetual population of lazy-bones users.

The name "GoDaddy" said it all to me back in the day after it popped up
out of nowhere. The name of my own provider, "QTH," says it all to me
too, but it says different things.
You might want to take a look at my provider, qth.com. It's very
Linux friendly as its name suggests. Needless to say, the guy behind it
is a ham.

Danke,

--
Don, KB7RPU, https://www.qsl.net/kb7rpu
There was a young lady named Bright Whose speed was far faster than light;
She set out one day In a relative way And returned on the previous night.

Re: For the beginners ? here a bit of electronics theory

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From: jer...@nospam.please (Jeroen Belleman)
Newsgroups: sci.electronics.design
Subject: Re: For the beginners ? here a bit of electronics theory
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 by: Jeroen Belleman - Wed, 12 Oct 2022 15:13 UTC

On 2022-10-12 16:53, Phil Hobbs wrote:
> John Larkin wrote:
>> On Wed, 12 Oct 2022 09:50:05 -0000 (UTC),
>> DecadentLinuxUserNumeroUno@decadence.org wrote:
>>
>>> piglet <erichpwagner@hotmail.com> wrote in
>>> news:ti5uj9$1dsan$1@dont-email.me:
>>>
>>>> On 12/10/2022 6:28 am, Anthony William Sloman wrote:
>>>>>
>>>>> You don't add an extra inductor.
>>>>>
>>>>
>>>> Except when it makes sense to explicitly add the leakage for
>>>> simulation. A recent example I had was a three winding transformer
>>>> where two windings are bifilar very closely coupled but the third
>>>> winding is loosely coupled (because of HV clearances).
>>>>
>>>> piglet
>>>>
>>>>
>>>
>>> "coupling" is via the core. Volts per turn does not change because you
>>> spaced the HV winding out a bit.
>>
>> But leakage inductance does.
>>
>> I'd guess that the old TV flyback transformers had a bunch of leakage
>> L. They sure skimped on ferrite.
>>
>>
>>
> You need leakage inductance in a flyback. Most of the energy is stored in the air gap.
>
> Cheers
>
> Phil Hobbs
>

Sure, the energy is mostly in the air gap, but it's not in the leakage
inductance! You could have near-complete flux coupling *with* an air
gap. The energy is still mostly in that gap.

Jeroen Belleman

Re: For the beginners ? here a bit of electronics theory

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From: jlar...@highlandSNIPMEtechnology.com (John Larkin)
Newsgroups: sci.electronics.design
Subject: Re: For the beginners ? here a bit of electronics theory
Date: Wed, 12 Oct 2022 08:48:01 -0700
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 by: John Larkin - Wed, 12 Oct 2022 15:48 UTC

On Wed, 12 Oct 2022 17:13:57 +0200, Jeroen Belleman
<jeroen@nospam.please> wrote:

>On 2022-10-12 16:53, Phil Hobbs wrote:
>> John Larkin wrote:
>>> On Wed, 12 Oct 2022 09:50:05 -0000 (UTC),
>>> DecadentLinuxUserNumeroUno@decadence.org wrote:
>>>
>>>> piglet <erichpwagner@hotmail.com> wrote in
>>>> news:ti5uj9$1dsan$1@dont-email.me:
>>>>
>>>>> On 12/10/2022 6:28 am, Anthony William Sloman wrote:
>>>>>>
>>>>>> You don't add an extra inductor.
>>>>>>
>>>>>
>>>>> Except when it makes sense to explicitly add the leakage for
>>>>> simulation. A recent example I had was a three winding transformer
>>>>> where two windings are bifilar very closely coupled but the third
>>>>> winding is loosely coupled (because of HV clearances).
>>>>>
>>>>> piglet
>>>>>
>>>>>
>>>>
>>>> "coupling" is via the core. Volts per turn does not change because you
>>>> spaced the HV winding out a bit.
>>>
>>> But leakage inductance does.
>>>
>>> I'd guess that the old TV flyback transformers had a bunch of leakage
>>> L. They sure skimped on ferrite.
>>>
>>>
>>>
>> You need leakage inductance in a flyback. Most of the energy is stored in the air gap.
>>
>> Cheers
>>
>> Phil Hobbs
>>
>
>Sure, the energy is mostly in the air gap, but it's not in the leakage
>inductance! You could have near-complete flux coupling *with* an air
>gap. The energy is still mostly in that gap.
>
>Jeroen Belleman

I like the DRQ series of dual-winding inductors. They are bifalar
wound with air gaps, K typically 0.992.

I measured winding-winding breakdown at 2250 volts.

Re: For the beginners ? here a bit of electronics theory

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From: Decadent...@decadence.org
Newsgroups: sci.electronics.design
Subject: Re: For the beginners ? here a bit of electronics theory
Date: Wed, 12 Oct 2022 16:07:35 -0000 (UTC)
Organization: Aioe.org NNTP Server
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 by: Decadent...@decadence.org - Wed, 12 Oct 2022 16:07 UTC

Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> wrote in
news:03b26901-4446-e210-e243-655bb48f6c7e@electrooptical.net:

> John Larkin wrote:
>> On Wed, 12 Oct 2022 09:50:05 -0000 (UTC),
>> DecadentLinuxUserNumeroUno@decadence.org wrote:
>>
>>> piglet <erichpwagner@hotmail.com> wrote in
>>> news:ti5uj9$1dsan$1@dont-email.me:
>>>
>>>> On 12/10/2022 6:28 am, Anthony William Sloman wrote:
>>>>>
>>>>> You don't add an extra inductor.
>>>>>
>>>>
>>>> Except when it makes sense to explicitly add the leakage for
>>>> simulation. A recent example I had was a three winding
>>>> transformer where two windings are bifilar very closely coupled
>>>> but the third winding is loosely coupled (because of HV
>>>> clearances).
>>>>
>>>> piglet
>>>>
>>>>
>>>
>>> "coupling" is via the core. Volts per turn does not change
>>> because you spaced the HV winding out a bit.
>>
>> But leakage inductance does.
>>
>> I'd guess that the old TV flyback transformers had a bunch of
>> leakage L. They sure skimped on ferrite.
>>
>>
>>
> You need leakage inductance in a flyback. Most of the energy is
> stored in the air gap.
>
> Cheers
>
> Phil Hobbs
>

In "the core" as a result of "the air gap".

Re: For the beginners ? here a bit of electronics theory

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From: pNaonStp...@yahoo.com (Jan Panteltje)
Newsgroups: sci.electronics.design
Subject: Re: For the beginners ? here a bit of electronics theory
Date: Wed, 12 Oct 2022 16:35:38 GMT
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 by: Jan Panteltje - Wed, 12 Oct 2022 16:35 UTC

On a sunny day (Wed, 12 Oct 2022 15:12:01 -0000 (UTC)) it happened "Don"
<g@crcomp.net> wrote in <20221012a@crcomp.net>:

>Jan Panteltje wrote:
>> John Larkin wrote:
>>> Jan Panteltje wrote:
>>>>
>>>>I have the distinct impression current civilization is sort of stuck
>>>>
>>>>or moving backward, I see things here done bad that would not have happened
>>>>that way in the seventies... carelessness or incompetence...
>>>>you are lucky if you have competent people working for you,
>>>>hard to find any here these days it seems.
>>>
>>>I blame Microsoft.
>>
>> Indeed!!!
>> I got email from my US website hosting company 'godaddy' that as of
>> tomorrow they no longer support pop email,
>> and move every email related thing to Microsoft, as 'everybody has a
>> smartphone anyways'.
>> I phoned them, after 3 attempts I got a real person on the line
>> he told me it was for 'security reasons'...
>> Well Linux has done better at that .., and no pop email makes life
>> difficult as everything is automatically scripted
>> and organized here.
>> Told the guy tell your boss I do not like it.
>> Just found a local web hosting company and will be moving everything
>> there,Godaddy sucks now.
>> There will probably be a 'panteltje.net' for test and if that works OK
>> I will move panteltje,com there too.
>> So, an other US company shoots itself in the foot, loses me as customer
>> after 25 years!!! by going Microsoft.
>
>There's the right way, the wrong way, and the Microsoft way. Microsoft
>bets on a perpetual population of lazy-bones users.
>
>The name "GoDaddy" said it all to me back in the day after it popped up
>out of nowhere. The name of my own provider, "QTH," says it all to me
>too, but it says different things.
> You might want to take a look at my provider, qth.com. It's very
>Linux friendly as its name suggests. Needless to say, the guy behind it
>is a ham.
>
>Danke,

Thank you very much, simple and logical list of options on qth.com!
I will check it out, probably ask them a few things.

Re: For the beginners ? here a bit of electronics theory

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From: pcdhSpam...@electrooptical.net (Phil Hobbs)
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 by: Phil Hobbs - Wed, 12 Oct 2022 20:02 UTC

Jeroen Belleman wrote:
> On 2022-10-12 16:53, Phil Hobbs wrote:
>> John Larkin wrote:
>>> On Wed, 12 Oct 2022 09:50:05 -0000 (UTC),
>>> DecadentLinuxUserNumeroUno@decadence.org wrote:
>>>
>>>> piglet <erichpwagner@hotmail.com> wrote in
>>>> news:ti5uj9$1dsan$1@dont-email.me:
>>>>
>>>>> On 12/10/2022 6:28 am, Anthony William Sloman wrote:
>>>>>>
>>>>>> You don't add an extra inductor.
>>>>>>
>>>>>
>>>>> Except when it makes sense to explicitly add the leakage for
>>>>> simulation. A recent example I had was a three winding transformer
>>>>> where two windings are bifilar very closely coupled but the third
>>>>> winding is loosely coupled (because of HV clearances).
>>>>>
>>>>> piglet
>>>>>
>>>>>
>>>>
>>>> "coupling" is via the core.  Volts per turn does not change because you
>>>> spaced the HV winding out a bit.
>>>
>>> But leakage inductance does.
>>>
>>> I'd guess that the old TV flyback transformers had a bunch of leakage
>>> L. They sure skimped on ferrite.
>>>
>>>
>>>
>> You need leakage inductance in a flyback.  Most of the energy is
>> stored in the air gap.

>
> Sure, the energy is mostly in the air gap, but it's not in the leakage
> inductance! You could have near-complete flux coupling *with* an air
> gap. The energy is still mostly in that gap.

The two aren't identical, but they're sure related.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510

http://electrooptical.net
http://hobbs-eo.com

Re: For the beginners ? here a bit of electronics theory

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From: pcdhSpam...@electrooptical.net (Phil Hobbs)
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 by: Phil Hobbs - Wed, 12 Oct 2022 20:02 UTC

DecadentLinuxUserNumeroUno@decadence.org wrote:
> Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> wrote in
> news:03b26901-4446-e210-e243-655bb48f6c7e@electrooptical.net:
>
>> John Larkin wrote:
>>> On Wed, 12 Oct 2022 09:50:05 -0000 (UTC),
>>> DecadentLinuxUserNumeroUno@decadence.org wrote:
>>>
>>>> piglet <erichpwagner@hotmail.com> wrote in
>>>> news:ti5uj9$1dsan$1@dont-email.me:
>>>>
>>>>> On 12/10/2022 6:28 am, Anthony William Sloman wrote:
>>>>>>
>>>>>> You don't add an extra inductor.
>>>>>>
>>>>>
>>>>> Except when it makes sense to explicitly add the leakage for
>>>>> simulation. A recent example I had was a three winding
>>>>> transformer where two windings are bifilar very closely coupled
>>>>> but the third winding is loosely coupled (because of HV
>>>>> clearances).
>>>>>
>>>>> piglet
>>>>>
>>>>>
>>>>
>>>> "coupling" is via the core. Volts per turn does not change
>>>> because you spaced the HV winding out a bit.
>>>
>>> But leakage inductance does.
>>>
>>> I'd guess that the old TV flyback transformers had a bunch of
>>> leakage L. They sure skimped on ferrite.
>>>
>>>
>>>
>> You need leakage inductance in a flyback. Most of the energy is
>> stored in the air gap.
>>
>> Cheers
>>
>> Phil Hobbs
>>
>
> In "the core" as a result of "the air gap".
>

Nope, in the air gap itself.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510

http://electrooptical.net
http://hobbs-eo.com

Re: For the beginners ? here a bit of electronics theory

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From: erichpwa...@hotmail.com (piglet)
Newsgroups: sci.electronics.design
Subject: Re: For the beginners ? here a bit of electronics theory
Date: Wed, 12 Oct 2022 21:36:05 +0100
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 by: piglet - Wed, 12 Oct 2022 20:36 UTC

On 12/10/2022 9:02 pm, Phil Hobbs wrote:
> DecadentLinuxUserNumeroUno@decadence.org wrote:
>> Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> wrote in
>> news:03b26901-4446-e210-e243-655bb48f6c7e@electrooptical.net:
>>
>>> John Larkin wrote:
>>>> On Wed, 12 Oct 2022 09:50:05 -0000 (UTC),
>>>> DecadentLinuxUserNumeroUno@decadence.org wrote:
>>>>
>>>>> piglet <erichpwagner@hotmail.com> wrote in
>>>>> news:ti5uj9$1dsan$1@dont-email.me:
>>>>>
>>>>>> On 12/10/2022 6:28 am, Anthony William Sloman wrote:
>>>>>>>
>>>>>>> You don't add an extra inductor.
>>>>>>>
>>>>>>
>>>>>> Except when it makes sense to explicitly add the leakage for
>>>>>> simulation. A recent example I had was a three winding
>>>>>> transformer where two windings are bifilar very closely coupled
>>>>>> but the third winding is loosely coupled (because of HV
>>>>>> clearances).
>>>>>>
>>>>>> piglet
>>>>>>
>>>>>>
>>>>>
>>>>> "coupling" is via the core.  Volts per turn does not change
>>>>> because you spaced the HV winding out a bit.
>>>>
>>>> But leakage inductance does.
>>>>
>>>> I'd guess that the old TV flyback transformers had a bunch of
>>>> leakage L. They sure skimped on ferrite.
>>>>
>>>>
>>>>
>>> You need leakage inductance in a flyback.  Most of the energy is
>>> stored in the air gap.
>>>
>>> Cheers
>>>
>>> Phil Hobbs
>>>
>>
>>    In "the core" as a result of "the air gap".
>>
>
> Nope, in the air gap itself.
>
> Cheers
>
> Phil Hobbs
>

Not forgetting that in ferrite cores the air gap is distributed inside
the core as part of the ferrite mix.

piglet

Re: For the beginners ? here a bit of electronics theory

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Subject: Re: For the beginners ? here a bit of electronics theory
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From: pcdhSpam...@electrooptical.net (Phil Hobbs)
Message-ID: <3f6bb1b7-c567-6c9f-6d9e-4a2c2b4c48bf@electrooptical.net>
Date: Wed, 12 Oct 2022 16:50:23 -0400
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 by: Phil Hobbs - Wed, 12 Oct 2022 20:50 UTC

piglet wrote:
> On 12/10/2022 9:02 pm, Phil Hobbs wrote:
>> DecadentLinuxUserNumeroUno@decadence.org wrote:
>>> Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> wrote in
>>> news:03b26901-4446-e210-e243-655bb48f6c7e@electrooptical.net:
>>>
>>>> John Larkin wrote:
>>>>> On Wed, 12 Oct 2022 09:50:05 -0000 (UTC),
>>>>> DecadentLinuxUserNumeroUno@decadence.org wrote:
>>>>>
>>>>>> piglet <erichpwagner@hotmail.com> wrote in
>>>>>> news:ti5uj9$1dsan$1@dont-email.me:
>>>>>>
>>>>>>> On 12/10/2022 6:28 am, Anthony William Sloman wrote:
>>>>>>>>
>>>>>>>> You don't add an extra inductor.
>>>>>>>>
>>>>>>>
>>>>>>> Except when it makes sense to explicitly add the leakage for
>>>>>>> simulation. A recent example I had was a three winding
>>>>>>> transformer where two windings are bifilar very closely coupled
>>>>>>> but the third winding is loosely coupled (because of HV
>>>>>>> clearances).
>>>>>>>
>>>>>>> piglet
>>>>>>>
>>>>>>>
>>>>>>
>>>>>> "coupling" is via the core.  Volts per turn does not change
>>>>>> because you spaced the HV winding out a bit.
>>>>>
>>>>> But leakage inductance does.
>>>>>
>>>>> I'd guess that the old TV flyback transformers had a bunch of
>>>>> leakage L. They sure skimped on ferrite.
>>>>>
>>>>>
>>>>>
>>>> You need leakage inductance in a flyback.  Most of the energy is
>>>> stored in the air gap.
>>>>
>>>> Cheers
>>>>
>>>> Phil Hobbs
>>>>
>>>
>>>    In "the core" as a result of "the air gap".
>>>
>>
>> Nope, in the air gap itself.
>>
>> Cheers
>>
>> Phil Hobbs
>>
>
> Not forgetting that in ferrite cores the air gap is distributed inside
> the core as part of the ferrite mix.
>
> piglet
>
Depends. A TV flyback runs at the horizontal scan frequency (15750 Hz
or thereabouts), so core losses are less of an issue.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510

http://electrooptical.net
http://hobbs-eo.com

Re: For the beginners ? here a bit of electronics theory

<171d7749f502f973$491$3064126$e0ddea62@news.thecubenet.com>

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Newsgroups: sci.electronics.design
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From: no_s...@please.net (Clifford Heath)
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 by: Clifford Heath - Wed, 12 Oct 2022 23:49 UTC

On 13/10/22 03:35, Jan Panteltje wrote:
> On a sunny day (Wed, 12 Oct 2022 15:12:01 -0000 (UTC)) it happened "Don"
> <g@crcomp.net> wrote in <20221012a@crcomp.net>:
>
>> Jan Panteltje wrote:
>>> John Larkin wrote:
>>>> Jan Panteltje wrote:
>>>>>
>>>>> I have the distinct impression current civilization is sort of stuck
>>>>>
>>>>> or moving backward, I see things here done bad that would not have happened
>>>>> that way in the seventies... carelessness or incompetence...
>>>>> you are lucky if you have competent people working for you,
>>>>> hard to find any here these days it seems.
>>>>
>>>> I blame Microsoft.
>>>
>>> Indeed!!!
>>> I got email from my US website hosting company 'godaddy' that as of
>>> tomorrow they no longer support pop email,
>>> and move every email related thing to Microsoft, as 'everybody has a
>>> smartphone anyways'.
>>> I phoned them, after 3 attempts I got a real person on the line
>>> he told me it was for 'security reasons'...
>>> Well Linux has done better at that .., and no pop email makes life
>>> difficult as everything is automatically scripted
>>> and organized here.
>>> Told the guy tell your boss I do not like it.
>>> Just found a local web hosting company and will be moving everything
>>> there,Godaddy sucks now.
>>> There will probably be a 'panteltje.net' for test and if that works OK
>>> I will move panteltje,com there too.
>>> So, an other US company shoots itself in the foot, loses me as customer
>>> after 25 years!!! by going Microsoft.
>>
>> There's the right way, the wrong way, and the Microsoft way. Microsoft
>> bets on a perpetual population of lazy-bones users.
>>
>> The name "GoDaddy" said it all to me back in the day after it popped up
>> out of nowhere. The name of my own provider, "QTH," says it all to me
>> too, but it says different things.
>> You might want to take a look at my provider, qth.com. It's very
>> Linux friendly as its name suggests. Needless to say, the guy behind it
>> is a ham.
>>
>> Danke,
>
>
> Thank you very much, simple and logical list of options on qth.com!
> I will check it out, probably ask them a few things.

Fastmail is an excellent email provider.

Re: For the beginners ? here a bit of electronics theory

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From: use...@revmaps.no-ip.org (Jasen Betts)
Newsgroups: sci.electronics.design
Subject: Re: For the beginners ? here a bit of electronics theory
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 by: Jasen Betts - Thu, 13 Oct 2022 06:23 UTC

On 2022-10-12, Jan Panteltje <pNaonStpealmtje@yahoo.com> wrote:
> On a sunny day (Mon, 10 Oct 2022 09:30:09 -0700) it happened John Larkin
><jlarkin@highlandSNIPMEtechnology.com> wrote in
><d0i8khplkcgi9o26hq7lvbn0i2mqfi71fg@4ax.com>:
>
>>On Mon, 10 Oct 2022 16:17:49 GMT, Jan Panteltje
>><pNaonStpealmtje@yahoo.com> wrote:
>>>
>>>I have the distinct impression current civilization is sort of stuck
>>>
>>>or moving backward, I see things here done bad that would not have happened
>>>that way in the seventies... carelessness or incompetence...
>>>you are lucky if you have competent people working for you,
>>>hard to find any here these days it seems.
>>
>>I blame Microsoft.
>
> Indeed!!!
> I got email from my US website hosting company 'godaddy' that as of tomorrow they no longer support pop email,
> and move every email related thing to Microsoft, as 'everybody has a smartphone anyways'.

If they don't POP maybe they can SMTP it to your server instead. (I think I collect my hotmail email by SMTP)

> Just found a local web hosting company and will be moving everything there, Godaddy sucks now.
> There will probably be a 'panteltje.net' for test and if that works OK I will move panteltje,com there too.
> So, an other US company shoots itself in the foot, loses me as customer after 25 years!!! by going Microsoft.

--
Jasen.

Re: For the beginners ? here a bit of electronics theory

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From: pNaonStp...@yahoo.com (Jan Panteltje)
Newsgroups: sci.electronics.design
Subject: Re: For the beginners ? here a bit of electronics theory
Date: Thu, 13 Oct 2022 07:54:05 GMT
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 by: Jan Panteltje - Thu, 13 Oct 2022 07:54 UTC

On a sunny day (Thu, 13 Oct 2022 06:23:30 -0000 (UTC)) it happened Jasen Betts
<usenet@revmaps.no-ip.org> wrote in <ti8at2$f21$1@gonzo.revmaps.no-ip.org>:

>On 2022-10-12, Jan Panteltje <pNaonStpealmtje@yahoo.com> wrote:
>> On a sunny day (Mon, 10 Oct 2022 09:30:09 -0700) it happened John Larkin
>><jlarkin@highlandSNIPMEtechnology.com> wrote in
>><d0i8khplkcgi9o26hq7lvbn0i2mqfi71fg@4ax.com>:
>>
>>>On Mon, 10 Oct 2022 16:17:49 GMT, Jan Panteltje
>>><pNaonStpealmtje@yahoo.com> wrote:
>>>>
>>>>I have the distinct impression current civilization is sort of stuck
>>>>
>>>>or moving backward, I see things here done bad that would not have happened
>>>>that way in the seventies... carelessness or incompetence...
>>>>you are lucky if you have competent people working for you,
>>>>hard to find any here these days it seems.
>>>
>>>I blame Microsoft.
>>
>> Indeed!!!
>> I got email from my US website hosting company 'godaddy' that as of tomorrow they no longer support pop email,
>> and move every email related thing to Microsoft, as 'everybody has a smartphone anyways'.
>
>If they don't POP maybe they can SMTP it to your server instead. (I think I collect my hotmail email by SMTP)
>
>> Just found a local web hosting company and will be moving everything there, Godaddy sucks now.
>> There will probably be a 'panteltje.net' for test and if that works OK I will move panteltje,com there too.
>> So, an other US company shoots itself in the foot, loses me as customer after 25 years!!! by going Microsoft.

Well there is more wrong at godaddy lately
They moved my website to new servers (for the second or third time) and
last time did not use cp -p to preserve timestamps so all has the same recent timestamp.
Good thing I have the whole 3 GB here as backup.
But as nuke war seems to be coming, maybe better not use a server in a target area,
Space wars; satellites blown up, undersea pipelines and data cables blown up...
Need to work on my Morse code to be able to sent smoke signals.
There will however be much noise interference from bombing smoke too, so need smoke signal CRC added..
Hey, designing a wood fired smoke signal generator ?
No internet, no WiFi, no teefee, only short wave radio left (only tube based) as big high altitude nukes EMP killed all semiconductors
or changed those into permanent conductors.
Is going to be interesting, old spark transmitter should work...
You can also use 2 cans connected by a rope to speak to each other.
Messages to the masses, wonder if my drone would still fly:
http://panteltje.com/panteltje/quadcopter/hsign.html

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