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Fascinating is a word I use for the unexpected. -- Spock, "The Squire of Gothos", stardate 2124.5

tech / sci.electronics.design / Super conducting diodes?

SubjectAuthor
* Super conducting diodes?Jan Panteltje
`* Re: Super conducting diodes?John Larkin
 +* Re: Super conducting diodes?Jan Panteltje
 |`* Re: Super conducting diodes?John Larkin
 | `- Re: Super conducting diodes?Jan Panteltje
 `* Re: Super conducting diodes?whit3rd
  `* Re: Super conducting diodes?Tabby
   `- Re: Super conducting diodes?Anthony William Sloman

1
Super conducting diodes?

<ufg61p$t84u$1@solani.org>

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From: ali...@comet.invalid (Jan Panteltje)
Newsgroups: sci.electronics.design
Subject: Super conducting diodes?
Date: Tue, 03 Oct 2023 04:41:28 GMT
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 by: Jan Panteltje - Tue, 3 Oct 2023 04:41 UTC

Examining the superconducting diode effect
https://www.sciencedaily.com/releases/2023/10/231002124407.htm
A collaboration of FLEET researchers from the University of Wollongong and Monash University
have reviewed the superconducting diode effect, one of the most fascinating
phenomena recently discovered in quantum condensed-matter physics.

Re: Super conducting diodes?

<cs2ohit552f5se6anim5i01r738evdhdpj@4ax.com>

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From: jl...@997arbor.com (John Larkin)
Newsgroups: sci.electronics.design
Subject: Re: Super conducting diodes?
Date: Tue, 03 Oct 2023 05:40:06 -0700
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 by: John Larkin - Tue, 3 Oct 2023 12:40 UTC

On Tue, 03 Oct 2023 04:41:28 GMT, Jan Panteltje <alien@comet.invalid>
wrote:

>Examining the superconducting diode effect
> https://www.sciencedaily.com/releases/2023/10/231002124407.htm
> A collaboration of FLEET researchers from the University of Wollongong and Monash University
> have reviewed the superconducting diode effect, one of the most fascinating
> phenomena recently discovered in quantum condensed-matter physics.

Low-noise diode-bridge mixer?

Re: Super conducting diodes?

<ufhb8n$tq74$1@solani.org>

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From: ali...@comet.invalid (Jan Panteltje)
Newsgroups: sci.electronics.design
Subject: Re: Super conducting diodes?
Date: Tue, 03 Oct 2023 15:16:39 GMT
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 by: Jan Panteltje - Tue, 3 Oct 2023 15:16 UTC

On a sunny day (Tue, 03 Oct 2023 05:40:06 -0700) it happened John Larkin
<jl@997arbor.com> wrote in <cs2ohit552f5se6anim5i01r738evdhdpj@4ax.com>:

>On Tue, 03 Oct 2023 04:41:28 GMT, Jan Panteltje <alien@comet.invalid>
>wrote:
>
>>Examining the superconducting diode effect
>> https://www.sciencedaily.com/releases/2023/10/231002124407.htm
>> A collaboration of FLEET researchers from the University of Wollongong and Monash University
>> have reviewed the superconducting diode effect, one of the most fascinating
>> phenomena recently discovered in quantum condensed-matter physics.
>
>Low-noise diode-bridge mixer?

Dunno, but very high currenr rectifiers?

Re: Super conducting diodes?

<gleohip8is9l1afcs9tup15m88rrdjvu2n@4ax.com>

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From: jl...@997arbor.com (John Larkin)
Newsgroups: sci.electronics.design
Subject: Re: Super conducting diodes?
Date: Tue, 03 Oct 2023 09:01:30 -0700
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 by: John Larkin - Tue, 3 Oct 2023 16:01 UTC

On Tue, 03 Oct 2023 15:16:39 GMT, Jan Panteltje <alien@comet.invalid>
wrote:

>On a sunny day (Tue, 03 Oct 2023 05:40:06 -0700) it happened John Larkin
><jl@997arbor.com> wrote in <cs2ohit552f5se6anim5i01r738evdhdpj@4ax.com>:
>
>>On Tue, 03 Oct 2023 04:41:28 GMT, Jan Panteltje <alien@comet.invalid>
>>wrote:
>>
>>>Examining the superconducting diode effect
>>> https://www.sciencedaily.com/releases/2023/10/231002124407.htm
>>> A collaboration of FLEET researchers from the University of Wollongong and Monash University
>>> have reviewed the superconducting diode effect, one of the most fascinating
>>> phenomena recently discovered in quantum condensed-matter physics.
>>
>>Low-noise diode-bridge mixer?
>
>Dunno, but very high currenr rectifiers?

I'd guess the diodes work at millivolts and milliamps.

Re: Super conducting diodes?

<2741f37f-11f4-4241-afe1-e4711cd060ecn@googlegroups.com>

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Subject: Re: Super conducting diodes?
From: whit...@gmail.com (whit3rd)
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 by: whit3rd - Tue, 3 Oct 2023 16:34 UTC

On Tuesday, October 3, 2023 at 5:40:26 AM UTC-7, John Larkin wrote:
> On Tue, 03 Oct 2023 04:41:28 GMT, Jan Panteltje <al...@comet.invalid>
> wrote:
> >Examining the superconducting diode effect
> > https://www.sciencedaily.com/releases/2023/10/231002124407.htm

> Low-noise diode-bridge mixer?

Yeah, maybe, but the effect is to go from superconducting to plain old
metallic conducting, not 'switch off'; that means the impedance of the mixer
is milliohm-or-less.

Got any good 0.005 ohm transmission line designs?

Re: Super conducting diodes?

<66e31b95-8e8c-466e-861a-9e1107d74ebcn@googlegroups.com>

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Subject: Re: Super conducting diodes?
From: tabbyp...@gmail.com (Tabby)
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 by: Tabby - Wed, 4 Oct 2023 00:06 UTC

On Tuesday, 3 October 2023 at 17:34:52 UTC+1, whit3rd wrote:
> On Tuesday, October 3, 2023 at 5:40:26 AM UTC-7, John Larkin wrote:
> > On Tue, 03 Oct 2023 04:41:28 GMT, Jan Panteltje <al...@comet.invalid>
> > wrote:
> > >Examining the superconducting diode effect
> > > https://www.sciencedaily.com/releases/2023/10/231002124407.htm
> > Low-noise diode-bridge mixer?
>
> Yeah, maybe, but the effect is to go from superconducting to plain old
> metallic conducting, not 'switch off'; that means the impedance of the mixer
> is milliohm-or-less.
>
> Got any good 0.005 ohm transmission line designs?

Yeah, bit hard to get it through the door tho. Tracks are kinda wide.

Re: Super conducting diodes?

<ufit6a$uhit$1@solani.org>

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From: ali...@comet.invalid (Jan Panteltje)
Newsgroups: sci.electronics.design
Subject: Re: Super conducting diodes?
Date: Wed, 04 Oct 2023 05:28:41 GMT
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 by: Jan Panteltje - Wed, 4 Oct 2023 05:28 UTC

On a sunny day (Tue, 03 Oct 2023 09:01:30 -0700) it happened John Larkin
<jl@997arbor.com> wrote in <gleohip8is9l1afcs9tup15m88rrdjvu2n@4ax.com>:

>On Tue, 03 Oct 2023 15:16:39 GMT, Jan Panteltje <alien@comet.invalid>
>wrote:
>
>>On a sunny day (Tue, 03 Oct 2023 05:40:06 -0700) it happened John Larkin
>><jl@997arbor.com> wrote in <cs2ohit552f5se6anim5i01r738evdhdpj@4ax.com>:
>>
>>>On Tue, 03 Oct 2023 04:41:28 GMT, Jan Panteltje <alien@comet.invalid>
>>>wrote:
>>>
>>>>Examining the superconducting diode effect
>>>> https://www.sciencedaily.com/releases/2023/10/231002124407.htm
>>>> A collaboration of FLEET researchers from the University of Wollongong and Monash University
>>>> have reviewed the superconducting diode effect, one of the most fascinating
>>>> phenomena recently discovered in quantum condensed-matter physics.
>>>
>>>Low-noise diode-bridge mixer?
>>
>>Dunno, but very high currenr rectifiers?
>
>I'd guess the diodes work at millivolts and milliamps.

If superconducting it should work at much lower voltages, mayve microvolts?
Could perhaps be used for power generation from small temperature variatios,
I like the thermocouple high voltage generator, like this:
https://panteltje.nl/pub/lighting_a_LED_with_a_candle_setup_IMG_3607.GIF
https://panteltje.nl/pub/lighting_a_LED_with_a_candle_circuit_diagram_with_added_power_MOSFET.gif

Re: Super conducting diodes?

<ff3d46a8-5ed2-4879-96d6-c33e1a759ee1n@googlegroups.com>

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Subject: Re: Super conducting diodes?
From: bill.slo...@ieee.org (Anthony William Sloman)
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 by: Anthony William Slom - Thu, 5 Oct 2023 03:55 UTC

On Wednesday, October 4, 2023 at 11:06:31 AM UTC+11, Tabby wrote:
> On Tuesday, 3 October 2023 at 17:34:52 UTC+1, whit3rd wrote:
> > On Tuesday, October 3, 2023 at 5:40:26 AM UTC-7, John Larkin wrote:
> > > On Tue, 03 Oct 2023 04:41:28 GMT, Jan Panteltje <al...@comet.invalid>
> > > wrote:
> > > >Examining the superconducting diode effect
> > > > https://www.sciencedaily.com/releases/2023/10/231002124407.htm
> > > Low-noise diode-bridge mixer?
> >
> > Yeah, maybe, but the effect is to go from superconducting to plain old
> > metallic conducting, not 'switch off'; that means the impedance of the mixer
> > is milliohm-or-less.
> >
> > Got any good 0.005 ohm transmission line designs?
>
> Yeah, bit hard to get it through the door tho. Tracks are kinda wide.

Tabby seems to have been using a one of the simple formulae for calculating transmission line impedance that you find in ECL application notes. They lose accuracy outside the range 50R to 75R.

The proper calculations are rather more complicated. and don't seem to offer 5mR transmission lines.

https://avtechpulse.com/catalog/page_new_av-clz_rev7.pdf

offers a 1R line, but seems to get it by paralleling a lot 5OR cables.

--
Bill Sloman, Sydney

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