R-cores come from Mars ?

Phil Allison

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Jul 29, 2020, 8:30:31 PM7/29/20

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Hi,

former regular poster here ( plus PITA) and now U-tube superstar "David L. Jones" is a barrel of laughs.

6 minutes into this RECENT vid, he discovers a R-core transformer in a tear down. Having no clue what it is he goes ape.

https://www.youtube.com/watch?v=hVIo7vmIExw&t=140s

Enjoy.

.... Phil

Phil Hobbs

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Jul 29, 2020, 8:51:38 PM7/29/20

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Hadn't come across the gapless rectangular core genre, but ISTM it's
just an easier-to-wind version of a toroid, with the two windings
separated, and therefore has the toroid's well-known advantages. No?

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

Phil Allison

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Jul 29, 2020, 9:52:41 PM7/29/20

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Phil Hobbs wrote:

===================

>
> > Hi,
> >
> >
> > former regular poster here ( plus PITA) and now U-tube superstar "David L. Jones" is a barrel of laughs.
> >
> > 6 minutes into this RECENT vid, he discovers a R-core transformer in a tear down. Having no clue what it is he goes ape.
> >
> > https://www.youtube.com/watch?v=hVIo7vmIExw&t=140s
> >
> > Enjoy.
> >
>
> Hadn't come across the gapless rectangular core genre, but ISTM it's
> just an easier-to-wind version of a toroid, with the two windings
> separated, and therefore has the toroid's well-known advantages. No?
>

** You're a long way from home ?

See the replies under the name "John Coops".

My long comment is down the list.

Toriods are very quick to wind, but need expensive machines.

RE-cores are wound using simple machines and familiar insulation methods.

.... Phil

Trevor Wilson

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Jul 30, 2020, 5:24:03 AM7/30/20

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On 30/07/2020 10:51 am, Phil Hobbs wrote:
> On 2020-07-29 20:30, Phil Allison wrote:
>>
>> Hi,
>>
>> former regular poster here ( plus PITA) and now U-tube superstar
>> "David L. Jones" is a barrel of laughs.
>>
>> 6 minutes into this RECENT vid, he discovers a R-core transformer in a
>> tear down. Having no clue what it is he goes ape.
>>
>> https://www.youtube.com/watch?v=hVIo7vmIExw&t=140s
>>
>> Enjoy.
>>
>
> Hadn't come across the gapless rectangular core genre, but ISTM it's
> just an easier-to-wind version of a toroid, with the two windings
> separated, and therefore has the toroid's well-known advantages. No?
>
> Cheers
>
> Phil Hobbs
>

**R-cores have a few advantages and a dew disadvantages. They're larger
and less efficient than toroids, but offer vastly superior isolation
from mains interference. You'll often find them in high end, low level
applications. The last one I saw was in a VERY expensive Sony CD DVD/CD
player.

--
Trevor Wilson
www.rageaudio.com.au

--
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Phil Allison

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Jul 30, 2020, 5:44:33 AM7/30/20

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Trevor Wilson is always good for a Laugh wrote:

============================================

>
>
> **R-cores have a few advantages and a dew disadvantages.
>

** Not the topic - DLJ was the topic.

> They're larger and less efficient than toroids,

** Not by much.

> but offer vastly superior isolation
> from mains interference.

** Funny the makers do not claim that.

They would if the legally could.

> You'll often find them in high end, low level
> applications. The last one I saw was in a VERY expensive Sony CD DVD/CD
> player.

** Most likely as it is simple to make Class 2 versions.

Near impossible with small toroidals.

FYI:

Replying to TW's tech absurdities is a regular turkey shoot.

..... Phil

Phil Hobbs

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Jul 30, 2020, 7:29:51 AM7/30/20

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On 2020-07-29 21:52, Phil Allison wrote:
> Phil Hobbs wrote:
>
> ===================
>>
>>> Hi,
>>>
>>>
>>> former regular poster here ( plus PITA) and now U-tube superstar "David L. Jones" is a barrel of laughs.
>>>
>>> 6 minutes into this RECENT vid, he discovers a R-core transformer in a tear down. Having no clue what it is he goes ape.
>>>
>>> https://www.youtube.com/watch?v=hVIo7vmIExw&t=140s
>>>
>>> Enjoy.
>>>
>>
>> Hadn't come across the gapless rectangular core genre, but ISTM it's
>> just an easier-to-wind version of a toroid, with the two windings
>> separated, and therefore has the toroid's well-known advantages. No?
>>
>
> ** You're a long way from home ?

Well, we're all stuck with virtual tourism at the moment. :(

Cheers

Phil Hobbs