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tech / sci.electronics.design / Fluke has lost their mind

Fluke has lost their mind

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From: jl...@650pot.com (john larkin)
Newsgroups: sci.electronics.design
Subject: Fluke has lost their mind
Date: Wed, 08 Nov 2023 11:04:46 -0800
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by: john larkin - Wed, 8 Nov 2023 19:04 UTC

https://www.amazon.com/Fluke-TL81A-Test-Deluxe-Electronic/dp/B000NI2B6A/ref=pd_lutyp_rtpb_sccl_2_1/142-3653234-3875240?pd_rd_w=8wX1f&content-id=amzn1.sym.9c90becd-3e6e-4609-85c5-d4298ba525ad&pf_rd_p=9c90becd-3e6e-4609-85c5-d4298ba525ad&pf_rd_r=W2VAXEFG42ZY2RN15N9V&pd_rd_wg=Tc99b&pd_rd_r=eca67892-4420-4869-8d8e-145a23c7fb1f&pd_rd_i=B000NI2B6A&th=1

Some of their handheld DVMs are over $400.

Re: Fluke has lost their mind

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From: new...@analogconsultants.com (Joerg)
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Subject: Re: Fluke has lost their mind
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by: Joerg - Wed, 8 Nov 2023 21:43 UTC

On 11/8/23 11:04 AM, john larkin wrote:
> https://www.amazon.com/Fluke-TL81A-Test-Deluxe-Electronic/dp/B000NI2B6A/ref=pd_lutyp_rtpb_sccl_2_1/142-3653234-3875240?pd_rd_w=8wX1f&content-id=amzn1.sym.9c90becd-3e6e-4609-85c5-d4298ba525ad&pf_rd_p=9c90becd-3e6e-4609-85c5-d4298ba525ad&pf_rd_r=W2VAXEFG42ZY2RN15N9V&pd_rd_wg=Tc99b&pd_rd_r=eca67892-4420-4869-8d8e-145a23c7fb1f&pd_rd_i=B000NI2B6A&th=1
>
> Some of their handheld DVMs are over $400.
>

Sometimes I also question their design decisions. I have the Fluke 8845A
bench meter. It puts out around 10V (!) in the ohms ranges. That will
easily blow reverse Vbe of a modern RF transistor which is often 2-3V
abs max. Some might just zener and still kind of work but their noise
figure and possibly hfe might then be shot. The old annealing trick by
crunching a burning cigarette butt on top of the transistor won't work
well anymore since they are flea-sized plastic packages, and almost
nobody smokes anymore.

My cheapo Harborfreight meter applies less than 300mV. So right now on
an RF board I am using a $5 meter because the $1000+ meter isn't up to
the job.

At the very least I'd have expected Fluke to provide aselectable lower
voltage while sacrificing accuracy. Being off by 0.1% in the ohms range
sure beats blowing an unobtanium RF part.

--
Regards, Joerg

http://www.analogconsultants.com/

Re: Fluke has lost their mind

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by: Phil Hobbs - Wed, 8 Nov 2023 23:08 UTC

On 2023-11-08 14:04, john larkin wrote:
> https://www.amazon.com/Fluke-TL81A-Test-Deluxe-Electronic/dp/B000NI2B6A/ref=pd_lutyp_rtpb_sccl_2_1/142-3653234-3875240?pd_rd_w=8wX1f&content-id=amzn1.sym.9c90becd-3e6e-4609-85c5-d4298ba525ad&pf_rd_p=9c90becd-3e6e-4609-85c5-d4298ba525ad&pf_rd_r=W2VAXEFG42ZY2RN15N9V&pd_rd_wg=Tc99b&pd_rd_r=eca67892-4420-4869-8d8e-145a23c7fb1f&pd_rd_i=B000NI2B6A&th=1
>
> Some of their handheld DVMs are over $400.
>

I paid $275 for an original crispy flavor(*) Fluke 87 in about 1989.

Cheers

Phil Hobbs

(*) apologies to the late Jim Thompson

--
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: Fluke has lost their mind

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by: Phil Hobbs - Wed, 8 Nov 2023 23:12 UTC

On 2023-11-08 18:08, Phil Hobbs wrote:
> On 2023-11-08 14:04, john larkin wrote:
>> https://www.amazon.com/Fluke-TL81A-Test-Deluxe-Electronic/dp/B000NI2B6A/ref=pd_lutyp_rtpb_sccl_2_1/142-3653234-3875240?pd_rd_w=8wX1f&content-id=amzn1.sym.9c90becd-3e6e-4609-85c5-d4298ba525ad&pf_rd_p=9c90becd-3e6e-4609-85c5-d4298ba525ad&pf_rd_r=W2VAXEFG42ZY2RN15N9V&pd_rd_wg=Tc99b&pd_rd_r=eca67892-4420-4869-8d8e-145a23c7fb1f&pd_rd_i=B000NI2B6A&th=1
>>
>>
>> Some of their handheld DVMs are over $400.
>>
>
> I paid $275 for an original crispy flavor(*) Fluke 87 in about 1989.

I should add that I'm very fond of these DMM probes:

<https://probemaster.com/8000-series-standard/>

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: Fluke has lost their mind

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by: Liz Tuddenham - Thu, 9 Nov 2023 10:14 UTC

Joerg <news@analogconsultants.com> wrote:

[...]
> Sometimes I also question their design decisions. I have the Fluke 8845A
> bench meter. It puts out around 10V (!) in the ohms ranges. That will
> easily blow reverse Vbe of a modern RF transistor which is often 2-3V
> abs max. Some might just zener and still kind of work but their noise
> figure and possibly hfe might then be shot. The old annealing trick by
> crunching a burning cigarette butt on top of the transistor won't work
> well anymore since they are flea-sized plastic packages, and almost
> nobody smokes anymore.
>
> My cheapo Harborfreight meter applies less than 300mV. So right now on
> an RF board I am using a $5 meter because the $1000+ meter isn't up to
> the job.
>
> At the very least I'd have expected Fluke to provide aselectable lower
> voltage while sacrificing accuracy. Being off by 0.1% in the ohms range
> sure beats blowing an unobtanium RF part.

When Fluke took over Philips Instruments, they tried to sell me a
replacement for my Philips PM2518. The salesman was talking rubbish
about the Philips putting out RFI on the test leads and the Fluke
'specification' sheet was just a glossy advert full of glib phrases that
were obviously designed to cover up the limitations of their meter.

I wrote to their technical department requesting a proper specification
sheet and received another copy of the advertisment - so I wrote again
saying "Have received advertisment, now please send specification as
requested".

The next day I got a 'phone call from their chief salesman. He was
furious and told me I was a fool not to buy one of their meters and
nobody expected a specification sheet that showed up where the meter
might lose accuracy (the Philips specification *booklet* had graphs to
show the areas of greatest and least accuracy). What a way to treat a
potential customer!

I bought another Philips before Fluke could stop their production.

--
~ Liz Tuddenham ~
(Remove the ".invalid"s and add ".co.uk" to reply)
www.poppyrecords.co.uk

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Subject: Re: Fluke has lost their mind
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by: John Larkin - Thu, 9 Nov 2023 15:10 UTC

On Wed, 8 Nov 2023 13:43:05 -0800, Joerg <news@analogconsultants.com>
wrote:

>On 11/8/23 11:04 AM, john larkin wrote:
>> https://www.amazon.com/Fluke-TL81A-Test-Deluxe-Electronic/dp/B000NI2B6A/ref=pd_lutyp_rtpb_sccl_2_1/142-3653234-3875240?pd_rd_w=8wX1f&content-id=amzn1.sym.9c90becd-3e6e-4609-85c5-d4298ba525ad&pf_rd_p=9c90becd-3e6e-4609-85c5-d4298ba525ad&pf_rd_r=W2VAXEFG42ZY2RN15N9V&pd_rd_wg=Tc99b&pd_rd_r=eca67892-4420-4869-8d8e-145a23c7fb1f&pd_rd_i=B000NI2B6A&th=1
>>
>> Some of their handheld DVMs are over $400.
>>
>
>Sometimes I also question their design decisions. I have the Fluke 8845A
>bench meter. It puts out around 10V (!) in the ohms ranges. That will
>easily blow reverse Vbe of a modern RF transistor which is often 2-3V
>abs max. Some might just zener and still kind of work but their noise
>figure and possibly hfe might then be shot. The old annealing trick by
>crunching a burning cigarette butt on top of the transistor won't work
>well anymore since they are flea-sized plastic packages, and almost
>nobody smokes anymore.
>
>My cheapo Harborfreight meter applies less than 300mV. So right now on
>an RF board I am using a $5 meter because the $1000+ meter isn't up to
>the job.
>
>At the very least I'd have expected Fluke to provide aselectable lower
>voltage while sacrificing accuracy. Being off by 0.1% in the ohms range
>sure beats blowing an unobtanium RF part.

I really like my 8845A. It's much better than the contemporary
Keithley or HP meters. It will really measure micovolts.

10 volts on the ohms ranges is good, as long as you know about it. It
tests diodes and zeners and such. The current is low so is unlikely to
damage anything.

My 8845 hasn't been calibrated in human memory. I connected it to a
new Keysight SMU and their voltage measurements agreed to a few PPM.

Re: Fluke has lost their mind

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From: jl...@650pot.com (john larkin)
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Subject: Re: Fluke has lost their mind
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by: john larkin - Thu, 9 Nov 2023 22:58 UTC

On Wed, 8 Nov 2023 18:12:38 -0500, Phil Hobbs
<pcdhSpamMeSenseless@electrooptical.net> wrote:

>On 2023-11-08 18:08, Phil Hobbs wrote:
>> On 2023-11-08 14:04, john larkin wrote:
>>> https://www.amazon.com/Fluke-TL81A-Test-Deluxe-Electronic/dp/B000NI2B6A/ref=pd_lutyp_rtpb_sccl_2_1/142-3653234-3875240?pd_rd_w=8wX1f&content-id=amzn1.sym.9c90becd-3e6e-4609-85c5-d4298ba525ad&pf_rd_p=9c90becd-3e6e-4609-85c5-d4298ba525ad&pf_rd_r=W2VAXEFG42ZY2RN15N9V&pd_rd_wg=Tc99b&pd_rd_r=eca67892-4420-4869-8d8e-145a23c7fb1f&pd_rd_i=B000NI2B6A&th=1
>>>
>>>
>>> Some of their handheld DVMs are over $400.
>>>
>>
>> I paid $275 for an original crispy flavor(*) Fluke 87 in about 1989.
>
>I should add that I'm very fond of these DMM probes:
>
><https://probemaster.com/8000-series-standard/>
>
>Cheers
>
>Phil Hobbs

I was just probing a very tight board with a sewing needle.

Re: Fluke has lost their mind

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Subject: Re: Fluke has lost their mind
From: langw...@fonz.dk (Lasse Langwadt Christensen)
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by: Lasse Langwadt Chris - Thu, 9 Nov 2023 23:15 UTC

torsdag den 9. november 2023 kl. 23.58.20 UTC+1 skrev john larkin:
> On Wed, 8 Nov 2023 18:12:38 -0500, Phil Hobbs
> <pcdhSpamM...@electrooptical.net> wrote:
>
> >On 2023-11-08 18:08, Phil Hobbs wrote:
> >> On 2023-11-08 14:04, john larkin wrote:
> >>> https://www.amazon.com/Fluke-TL81A-Test-Deluxe-Electronic/dp/B000NI2B6A/ref=pd_lutyp_rtpb_sccl_2_1/142-3653234-3875240?pd_rd_w=8wX1f&content-id=amzn1.sym.9c90becd-3e6e-4609-85c5-d4298ba525ad&pf_rd_p=9c90becd-3e6e-4609-85c5-d4298ba525ad&pf_rd_r=W2VAXEFG42ZY2RN15N9V&pd_rd_wg=Tc99b&pd_rd_r=eca67892-4420-4869-8d8e-145a23c7fb1f&pd_rd_i=B000NI2B6A&th=1
> >>>
> >>>
> >>> Some of their handheld DVMs are over $400.
> >>>
> >>
> >> I paid $275 for an original crispy flavor(*) Fluke 87 in about 1989.
> >
> >I should add that I'm very fond of these DMM probes:
> >
> ><https://probemaster.com/8000-series-standard/>
> >
> >Cheers
> >
> >Phil Hobbs
> I was just probing a very tight board with a sewing needle.

that is basically what these are, https://www.fluke.com/en-us/product/accessories/test-leads/tl910

Re: Fluke has lost their mind

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From: martin_r...@verison.net (Martin Rid)
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Subject: Re: Fluke has lost their mind
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by: Martin Rid - Thu, 9 Nov 2023 23:29 UTC

Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> Wrote in message:r
> On 2023-11-08 18:08, Phil Hobbs wrote:> On 2023-11-08 14:04, john larkin wrote:>> https://www.amazon.com/Fluke-TL81A-Test-Deluxe-Electronic/dp/B000NI2B6A/ref=pd_lutyp_rtpb_sccl_2_1/142-3653234-3875240?pd_rd_w=8wX1f&content-id=amzn1.sym.9c90becd-3e6e-4609-85c5-d4298ba525ad&pf_rd_p=9c90becd-3e6e-4609-85c5-d4298ba525ad&pf_rd_r=W2VAXEFG42ZY2RN15N9V&pd_rd_wg=Tc99b&pd_rd_r=eca67892-4420-4869-8d8e-145a23c7fb1f&pd_rd_i=B000NI2B6A&th=1 >>>>>> Some of their handheld DVMs are over $400.>>> > I paid $275 for an original crispy flavor(*) Fluke 87 in about 1989.I should add that I'm very fond of these DMM probes:<https://probemaster.com/8000-series-standard/>CheersPhil Hobbs-- Dr Philip C D HobbsPrincipal ConsultantElectroOptical Innovations LLC / Hobbs ElectroOpticsOptics, Electro-optics, Photonics, Analog ElectronicsBriarcliff Manor NY 10510http://electrooptical.nethttp://hobbs-eo.com

Yes these are very good probes, but the reverse banana style for
the very old Simpsons didn't fit.

Cheers
--

----Android NewsGroup Reader----
https://piaohong.s3-us-west-2.amazonaws.com/usenet/index.html

Re: Fluke has lost their mind

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From: pcdhSpam...@electrooptical.net (Phil Hobbs)
Newsgroups: sci.electronics.design
Subject: Re: Fluke has lost their mind
Date: Thu, 9 Nov 2023 23:51:39 -0000 (UTC)
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by: Phil Hobbs - Thu, 9 Nov 2023 23:51 UTC

john larkin <jl@650pot.com> wrote:
> On Wed, 8 Nov 2023 18:12:38 -0500, Phil Hobbs
> <pcdhSpamMeSenseless@electrooptical.net> wrote:
>
>> On 2023-11-08 18:08, Phil Hobbs wrote:
>>> On 2023-11-08 14:04, john larkin wrote:
>>>> https://www.amazon.com/Fluke-TL81A-Test-Deluxe-Electronic/dp/B000NI2B6A/ref=pd_lutyp_rtpb_sccl_2_1/142-3653234-3875240?pd_rd_w=8wX1f&content-id=amzn1.sym.9c90becd-3e6e-4609-85c5-d4298ba525ad&pf_rd_p=9c90becd-3e6e-4609-85c5-d4298ba525ad&pf_rd_r=W2VAXEFG42ZY2RN15N9V&pd_rd_wg=Tc99b&pd_rd_r=eca67892-4420-4869-8d8e-145a23c7fb1f&pd_rd_i=B000NI2B6A&th=1
>>>>
>>>>
>>>>
>>>> Some of their handheld DVMs are over $400.
>>>>
>>>
>>> I paid $275 for an original crispy flavor(*) Fluke 87 in about 1989.
>>
>> I should add that I'm very fond of these DMM probes:
>>
>> <https://probemaster.com/8000-series-standard/>
>>
>> Cheers
>>
>> Phil Hobbs
>
> I was just probing a very tight board with a sewing needle.
>
>

Darned board. ;)

Phil Hobbs

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

Re: Fluke has lost their mind

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by: john larkin - Thu, 9 Nov 2023 23:52 UTC

On Thu, 9 Nov 2023 15:15:51 -0800 (PST), Lasse Langwadt Christensen
<langwadt@fonz.dk> wrote:

>torsdag den 9. november 2023 kl. 23.58.20 UTC+1 skrev john larkin:
>> On Wed, 8 Nov 2023 18:12:38 -0500, Phil Hobbs
>> <pcdhSpamM...@electrooptical.net> wrote:
>>
>> >On 2023-11-08 18:08, Phil Hobbs wrote:
>> >> On 2023-11-08 14:04, john larkin wrote:
>> >>> https://www.amazon.com/Fluke-TL81A-Test-Deluxe-Electronic/dp/B000NI2B6A/ref=pd_lutyp_rtpb_sccl_2_1/142-3653234-3875240?pd_rd_w=8wX1f&content-id=amzn1.sym.9c90becd-3e6e-4609-85c5-d4298ba525ad&pf_rd_p=9c90becd-3e6e-4609-85c5-d4298ba525ad&pf_rd_r=W2VAXEFG42ZY2RN15N9V&pd_rd_wg=Tc99b&pd_rd_r=eca67892-4420-4869-8d8e-145a23c7fb1f&pd_rd_i=B000NI2B6A&th=1
>> >>>
>> >>>
>> >>> Some of their handheld DVMs are over $400.
>> >>>
>> >>
>> >> I paid $275 for an original crispy flavor(*) Fluke 87 in about 1989.
>> >
>> >I should add that I'm very fond of these DMM probes:
>> >
>> ><https://probemaster.com/8000-series-standard/>
>> >
>> >Cheers
>> >
>> >Phil Hobbs
>> I was just probing a very tight board with a sewing needle.
>
>that is basically what these are, https://www.fluke.com/en-us/product/accessories/test-leads/tl910

Cool, a $1300 handheld DVM.

https://www.fluke.com/en-us/product/calibration-tools/ma-loop-calibrators/fluke-789

Re: Fluke has lost their mind

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From: jl...@997PotHill.com (John Larkin)
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Subject: Re: Fluke has lost their mind
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by: John Larkin - Fri, 10 Nov 2023 02:32 UTC

On Thu, 9 Nov 2023 23:51:39 -0000 (UTC), Phil Hobbs
<pcdhSpamMeSenseless@electrooptical.net> wrote:

>john larkin <jl@650pot.com> wrote:
>> On Wed, 8 Nov 2023 18:12:38 -0500, Phil Hobbs
>> <pcdhSpamMeSenseless@electrooptical.net> wrote:
>>
>>> On 2023-11-08 18:08, Phil Hobbs wrote:
>>>> On 2023-11-08 14:04, john larkin wrote:
>>>>> https://www.amazon.com/Fluke-TL81A-Test-Deluxe-Electronic/dp/B000NI2B6A/ref=pd_lutyp_rtpb_sccl_2_1/142-3653234-3875240?pd_rd_w=8wX1f&content-id=amzn1.sym.9c90becd-3e6e-4609-85c5-d4298ba525ad&pf_rd_p=9c90becd-3e6e-4609-85c5-d4298ba525ad&pf_rd_r=W2VAXEFG42ZY2RN15N9V&pd_rd_wg=Tc99b&pd_rd_r=eca67892-4420-4869-8d8e-145a23c7fb1f&pd_rd_i=B000NI2B6A&th=1
>>>>>
>>>>>
>>>>>
>>>>> Some of their handheld DVMs are over $400.
>>>>>
>>>>
>>>> I paid $275 for an original crispy flavor(*) Fluke 87 in about 1989.
>>>
>>> I should add that I'm very fond of these DMM probes:
>>>
>>> <https://probemaster.com/8000-series-standard/>
>>>
>>> Cheers
>>>
>>> Phil Hobbs
>>
>> I was just probing a very tight board with a sewing needle.
>>
>>
>
>Darned board. ;)
>
>Phil Hobbs

We could start a new thread.

Re: Fluke has lost their mind

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From: pcdhSpam...@electrooptical.net (Phil Hobbs)
Newsgroups: sci.electronics.design
Subject: Re: Fluke has lost their mind
Date: Fri, 10 Nov 2023 03:44:29 -0000 (UTC)
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by: Phil Hobbs - Fri, 10 Nov 2023 03:44 UTC

John Larkin <jl@997PotHill.com> wrote:
> On Thu, 9 Nov 2023 23:51:39 -0000 (UTC), Phil Hobbs
> <pcdhSpamMeSenseless@electrooptical.net> wrote:
>
>> john larkin <jl@650pot.com> wrote:
>>> On Wed, 8 Nov 2023 18:12:38 -0500, Phil Hobbs
>>> <pcdhSpamMeSenseless@electrooptical.net> wrote:
>>>
>>>> On 2023-11-08 18:08, Phil Hobbs wrote:
>>>>> On 2023-11-08 14:04, john larkin wrote:
>>>>>> https://www.amazon.com/Fluke-TL81A-Test-Deluxe-Electronic/dp/B000NI2B6A/ref=pd_lutyp_rtpb_sccl_2_1/142-3653234-3875240?pd_rd_w=8wX1f&content-id=amzn1.sym.9c90becd-3e6e-4609-85c5-d4298ba525ad&pf_rd_p=9c90becd-3e6e-4609-85c5-d4298ba525ad&pf_rd_r=W2VAXEFG42ZY2RN15N9V&pd_rd_wg=Tc99b&pd_rd_r=eca67892-4420-4869-8d8e-145a23c7fb1f&pd_rd_i=B000NI2B6A&th=1
>>>>>>
>>>>>>
>>>>>>
>>>>>> Some of their handheld DVMs are over $400.
>>>>>>
>>>>>
>>>>> I paid $275 for an original crispy flavor(*) Fluke 87 in about 1989.
>>>>
>>>> I should add that I'm very fond of these DMM probes:
>>>>
>>>> <https://probemaster.com/8000-series-standard/>
>>>>
>>>> Cheers
>>>>
>>>> Phil Hobbs
>>>
>>> I was just probing a very tight board with a sewing needle.
>>>
>>>
>>
>> Darned board. ;)
>>
>> Phil Hobbs
>
> We could start a new thread.

Pure fabrication.

Cheers

Phil Hobbs

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

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From: jl...@997PotHill.com (John Larkin)
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by: John Larkin - Fri, 10 Nov 2023 15:18 UTC

On Fri, 10 Nov 2023 03:44:29 -0000 (UTC), Phil Hobbs
<pcdhSpamMeSenseless@electrooptical.net> wrote:

>John Larkin <jl@997PotHill.com> wrote:
>> On Thu, 9 Nov 2023 23:51:39 -0000 (UTC), Phil Hobbs
>> <pcdhSpamMeSenseless@electrooptical.net> wrote:
>>
>>> john larkin <jl@650pot.com> wrote:
>>>> On Wed, 8 Nov 2023 18:12:38 -0500, Phil Hobbs
>>>> <pcdhSpamMeSenseless@electrooptical.net> wrote:
>>>>
>>>>> On 2023-11-08 18:08, Phil Hobbs wrote:
>>>>>> On 2023-11-08 14:04, john larkin wrote:
>>>>>>> https://www.amazon.com/Fluke-TL81A-Test-Deluxe-Electronic/dp/B000NI2B6A/ref=pd_lutyp_rtpb_sccl_2_1/142-3653234-3875240?pd_rd_w=8wX1f&content-id=amzn1.sym.9c90becd-3e6e-4609-85c5-d4298ba525ad&pf_rd_p=9c90becd-3e6e-4609-85c5-d4298ba525ad&pf_rd_r=W2VAXEFG42ZY2RN15N9V&pd_rd_wg=Tc99b&pd_rd_r=eca67892-4420-4869-8d8e-145a23c7fb1f&pd_rd_i=B000NI2B6A&th=1
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> Some of their handheld DVMs are over $400.
>>>>>>>
>>>>>>
>>>>>> I paid $275 for an original crispy flavor(*) Fluke 87 in about 1989.
>>>>>
>>>>> I should add that I'm very fond of these DMM probes:
>>>>>
>>>>> <https://probemaster.com/8000-series-standard/>
>>>>>
>>>>> Cheers
>>>>>
>>>>> Phil Hobbs
>>>>
>>>> I was just probing a very tight board with a sewing needle.
>>>>
>>>>
>>>
>>> Darned board. ;)
>>>
>>> Phil Hobbs
>>
>> We could start a new thread.
>
>Pure fabrication.
>
>Cheers
>
>Phil Hobbs

So what?

Re: Fluke has lost their mind

<uilid9$2t0km$1@dont-email.me>

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From: erichpwa...@hotmail.com (Piglet)
Newsgroups: sci.electronics.design
Subject: Re: Fluke has lost their mind
Date: Fri, 10 Nov 2023 15:31:44 +0000
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by: Piglet - Fri, 10 Nov 2023 15:31 UTC

On 10/11/2023 03:44, Phil Hobbs wrote:
> John Larkin <jl@997PotHill.com> wrote:
>> On Thu, 9 Nov 2023 23:51:39 -0000 (UTC), Phil Hobbs
>> <pcdhSpamMeSenseless@electrooptical.net> wrote:
>>
>>> john larkin <jl@650pot.com> wrote:
>>>> On Wed, 8 Nov 2023 18:12:38 -0500, Phil Hobbs
>>>> <pcdhSpamMeSenseless@electrooptical.net> wrote:
>>>>
>>>>> On 2023-11-08 18:08, Phil Hobbs wrote:
>>>>>> On 2023-11-08 14:04, john larkin wrote:
>>>>>>> https://www.amazon.com/Fluke-TL81A-Test-Deluxe-Electronic/dp/B000NI2B6A/ref=pd_lutyp_rtpb_sccl_2_1/142-3653234-3875240?pd_rd_w=8wX1f&content-id=amzn1.sym.9c90becd-3e6e-4609-85c5-d4298ba525ad&pf_rd_p=9c90becd-3e6e-4609-85c5-d4298ba525ad&pf_rd_r=W2VAXEFG42ZY2RN15N9V&pd_rd_wg=Tc99b&pd_rd_r=eca67892-4420-4869-8d8e-145a23c7fb1f&pd_rd_i=B000NI2B6A&th=1
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> Some of their handheld DVMs are over $400.
>>>>>>>
>>>>>>
>>>>>> I paid $275 for an original crispy flavor(*) Fluke 87 in about 1989.
>>>>>
>>>>> I should add that I'm very fond of these DMM probes:
>>>>>
>>>>> <https://probemaster.com/8000-series-standard/>
>>>>>
>>>>> Cheers
>>>>>
>>>>> Phil Hobbs
>>>>
>>>> I was just probing a very tight board with a sewing needle.
>>>>
>>>>
>>>
>>> Darned board. ;)
>>>
>>> Phil Hobbs
>>
>> We could start a new thread.
>
> Pure fabrication.
>
> Cheers
>
> Phil Hobbs
>

You'll have me in stitches with these yarns.

piglet

Re: Fluke has lost their mind

<arlski19d62g8sv04ud6b819viri5u6jh4@4ax.com>

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NNTP-Posting-Date: Fri, 10 Nov 2023 16:17:26 +0000
From: jl...@997PotHill.com (John Larkin)
Newsgroups: sci.electronics.design
Subject: Re: Fluke has lost their mind
Date: Fri, 10 Nov 2023 08:17:00 -0800
Organization: Highland Tech
Reply-To: xx@yy.com
Message-ID: <arlski19d62g8sv04ud6b819viri5u6jh4@4ax.com>
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by: John Larkin - Fri, 10 Nov 2023 16:17 UTC

On Fri, 10 Nov 2023 15:31:44 +0000, Piglet <erichpwagner@hotmail.com>
wrote:

>On 10/11/2023 03:44, Phil Hobbs wrote:
>> John Larkin <jl@997PotHill.com> wrote:
>>> On Thu, 9 Nov 2023 23:51:39 -0000 (UTC), Phil Hobbs
>>> <pcdhSpamMeSenseless@electrooptical.net> wrote:
>>>
>>>> john larkin <jl@650pot.com> wrote:
>>>>> On Wed, 8 Nov 2023 18:12:38 -0500, Phil Hobbs
>>>>> <pcdhSpamMeSenseless@electrooptical.net> wrote:
>>>>>
>>>>>> On 2023-11-08 18:08, Phil Hobbs wrote:
>>>>>>> On 2023-11-08 14:04, john larkin wrote:
>>>>>>>> https://www.amazon.com/Fluke-TL81A-Test-Deluxe-Electronic/dp/B000NI2B6A/ref=pd_lutyp_rtpb_sccl_2_1/142-3653234-3875240?pd_rd_w=8wX1f&content-id=amzn1.sym.9c90becd-3e6e-4609-85c5-d4298ba525ad&pf_rd_p=9c90becd-3e6e-4609-85c5-d4298ba525ad&pf_rd_r=W2VAXEFG42ZY2RN15N9V&pd_rd_wg=Tc99b&pd_rd_r=eca67892-4420-4869-8d8e-145a23c7fb1f&pd_rd_i=B000NI2B6A&th=1
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> Some of their handheld DVMs are over $400.
>>>>>>>>
>>>>>>>
>>>>>>> I paid $275 for an original crispy flavor(*) Fluke 87 in about 1989.
>>>>>>
>>>>>> I should add that I'm very fond of these DMM probes:
>>>>>>
>>>>>> <https://probemaster.com/8000-series-standard/>
>>>>>>
>>>>>> Cheers
>>>>>>
>>>>>> Phil Hobbs
>>>>>
>>>>> I was just probing a very tight board with a sewing needle.
>>>>>
>>>>>
>>>>
>>>> Darned board. ;)
>>>>
>>>> Phil Hobbs
>>>
>>> We could start a new thread.
>>
>> Pure fabrication.
>>
>> Cheers
>>
>> Phil Hobbs
>>
>
>You'll have me in stitches with these yarns.
>
>piglet

What's your point?

Re: Fluke has lost their mind

<uille4$2tkap$1@dont-email.me>

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From: pcdhSpam...@electrooptical.net (Phil Hobbs)
Newsgroups: sci.electronics.design
Subject: Re: Fluke has lost their mind
Date: Fri, 10 Nov 2023 16:23:32 -0000 (UTC)
Organization: A noiseless patient Spider
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by: Phil Hobbs - Fri, 10 Nov 2023 16:23 UTC

John Larkin <jl@997PotHill.com> wrote:
> On Fri, 10 Nov 2023 03:44:29 -0000 (UTC), Phil Hobbs
> <pcdhSpamMeSenseless@electrooptical.net> wrote:
>
>> John Larkin <jl@997PotHill.com> wrote:
>>> On Thu, 9 Nov 2023 23:51:39 -0000 (UTC), Phil Hobbs
>>> <pcdhSpamMeSenseless@electrooptical.net> wrote:
>>>
>>>> john larkin <jl@650pot.com> wrote:
>>>>> On Wed, 8 Nov 2023 18:12:38 -0500, Phil Hobbs
>>>>> <pcdhSpamMeSenseless@electrooptical.net> wrote:
>>>>>
>>>>>> On 2023-11-08 18:08, Phil Hobbs wrote:
>>>>>>> On 2023-11-08 14:04, john larkin wrote:
>>>>>>>> https://www.amazon.com/Fluke-TL81A-Test-Deluxe-Electronic/dp/B000NI2B6A/ref=pd_lutyp_rtpb_sccl_2_1/142-3653234-3875240?pd_rd_w=8wX1f&content-id=amzn1.sym.9c90becd-3e6e-4609-85c5-d4298ba525ad&pf_rd_p=9c90becd-3e6e-4609-85c5-d4298ba525ad&pf_rd_r=W2VAXEFG42ZY2RN15N9V&pd_rd_wg=Tc99b&pd_rd_r=eca67892-4420-4869-8d8e-145a23c7fb1f&pd_rd_i=B000NI2B6A&th=1
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> Some of their handheld DVMs are over $400.
>>>>>>>>
>>>>>>>
>>>>>>> I paid $275 for an original crispy flavor(*) Fluke 87 in about 1989.
>>>>>>
>>>>>> I should add that I'm very fond of these DMM probes:
>>>>>>
>>>>>> <https://probemaster.com/8000-series-standard/>
>>>>>>
>>>>>> Cheers
>>>>>>
>>>>>> Phil Hobbs
>>>>>
>>>>> I was just probing a very tight board with a sewing needle.
>>>>>
>>>>>
>>>>
>>>> Darned board. ;)
>>>>
>>>> Phil Hobbs
>>>
>>> We could start a new thread.
>>
>> Pure fabrication.
>>
>> Cheers
>>
>> Phil Hobbs
>
> So what?
>
>

It might unravel totally.
;)
Cheers

Phil Hobbs

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

Re: Fluke has lost their mind

<1qjzqyw.9pknx6a8kkm8N%liz@poppyrecords.invalid.invalid>

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From: liz...@poppyrecords.invalid.invalid (Liz Tuddenham)
Newsgroups: sci.electronics.design
Subject: Re: Fluke has lost their mind
Date: Fri, 10 Nov 2023 17:53:09 +0000
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by: Liz Tuddenham - Fri, 10 Nov 2023 17:53 UTC

John Larkin <jl@997PotHill.com> wrote:

> On Fri, 10 Nov 2023 15:31:44 +0000, Piglet <erichpwagner@hotmail.com>
> wrote:
>
> >On 10/11/2023 03:44, Phil Hobbs wrote:
> >> John Larkin <jl@997PotHill.com> wrote:
> >>> On Thu, 9 Nov 2023 23:51:39 -0000 (UTC), Phil Hobbs
> >>> <pcdhSpamMeSenseless@electrooptical.net> wrote:
> >>>
> >>>> john larkin <jl@650pot.com> wrote:
> >>>>> On Wed, 8 Nov 2023 18:12:38 -0500, Phil Hobbs
> >>>>> <pcdhSpamMeSenseless@electrooptical.net> wrote:
> >>>>>
> >>>>>> On 2023-11-08 18:08, Phil Hobbs wrote:
> >>>>>>> On 2023-11-08 14:04, john larkin wrote:
> >>>>>>>>
> >>>>>>>>
> >>>>>>>> Some of their handheld DVMs are over $400.
> >>>>>>>>
> >>>>>>>
> >>>>>>> I paid $275 for an original crispy flavor(*) Fluke 87 in about 1989.
> >>>>>>
> >>>>>> I should add that I'm very fond of these DMM probes:
> >>>>>>
> >>>>>> <https://probemaster.com/8000-series-standard/>
> >>>>>>
> >>>>>> Cheers
> >>>>>>
> >>>>>> Phil Hobbs
> >>>>>
> >>>>> I was just probing a very tight board with a sewing needle.
> >>>>>
> >>>>>
> >>>>
> >>>> Darned board. ;)
> >>>>
> >>>> Phil Hobbs
> >>>
> >>> We could start a new thread.
> >>
> >> Pure fabrication.
> >>
> >> Cheers
> >>
> >> Phil Hobbs
> >>
> >
> >You'll have me in stitches with these yarns.
> >
> >piglet
>
> What's your point?

That's crewel !

--
~ Liz Tuddenham ~
(Remove the ".invalid"s and add ".co.uk" to reply)
www.poppyrecords.co.uk

Re: Fluke has lost their mind

<s6sski1rdtfiusqjab60hobd81br8j5ser@4ax.com>

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NNTP-Posting-Date: Fri, 10 Nov 2023 18:05:55 +0000
From: jl...@650pot.com (john larkin)
Newsgroups: sci.electronics.design
Subject: Re: Fluke has lost their mind
Date: Fri, 10 Nov 2023 10:05:55 -0800
Message-ID: <s6sski1rdtfiusqjab60hobd81br8j5ser@4ax.com>
References: <oqmnkihbifh09dbgc6crtgr05nas3ls96l@4ax.com> <07c902ed-4618-a66d-72fb-6948154fd038@electrooptical.net> <f3b9f64b-4867-5a6d-8afb-f436c41b92e3@electrooptical.net> <9uoqkilngh0gm9oqputuo37469pr4l12v7@4ax.com> <uijrab$2eq87$1@dont-email.me> <dh5rki5ranm8eeuh7hts9dqghv5rac5k6m@4ax.com> <uik8ut$2l2pf$1@dont-email.me> <uilid9$2t0km$1@dont-email.me> <arlski19d62g8sv04ud6b819viri5u6jh4@4ax.com> <1qjzqyw.9pknx6a8kkm8N%liz@poppyrecords.invalid.invalid>
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by: john larkin - Fri, 10 Nov 2023 18:05 UTC

On Fri, 10 Nov 2023 17:53:09 +0000, liz@poppyrecords.invalid.invalid
(Liz Tuddenham) wrote:

>John Larkin <jl@997PotHill.com> wrote:
>
>> On Fri, 10 Nov 2023 15:31:44 +0000, Piglet <erichpwagner@hotmail.com>
>> wrote:
>>
>> >On 10/11/2023 03:44, Phil Hobbs wrote:
>> >> John Larkin <jl@997PotHill.com> wrote:
>> >>> On Thu, 9 Nov 2023 23:51:39 -0000 (UTC), Phil Hobbs
>> >>> <pcdhSpamMeSenseless@electrooptical.net> wrote:
>> >>>
>> >>>> john larkin <jl@650pot.com> wrote:
>> >>>>> On Wed, 8 Nov 2023 18:12:38 -0500, Phil Hobbs
>> >>>>> <pcdhSpamMeSenseless@electrooptical.net> wrote:
>> >>>>>
>> >>>>>> On 2023-11-08 18:08, Phil Hobbs wrote:
>> >>>>>>> On 2023-11-08 14:04, john larkin wrote:
>> >>>>>>>>
>> >>>>>>>>
>> >>>>>>>> Some of their handheld DVMs are over $400.
>> >>>>>>>>
>> >>>>>>>
>> >>>>>>> I paid $275 for an original crispy flavor(*) Fluke 87 in about 1989.
>> >>>>>>
>> >>>>>> I should add that I'm very fond of these DMM probes:
>> >>>>>>
>> >>>>>> <https://probemaster.com/8000-series-standard/>
>> >>>>>>
>> >>>>>> Cheers
>> >>>>>>
>> >>>>>> Phil Hobbs
>> >>>>>
>> >>>>> I was just probing a very tight board with a sewing needle.
>> >>>>>
>> >>>>>
>> >>>>
>> >>>> Darned board. ;)
>> >>>>
>> >>>> Phil Hobbs
>> >>>
>> >>> We could start a new thread.
>> >>
>> >> Pure fabrication.
>> >>
>> >> Cheers
>> >>
>> >> Phil Hobbs
>> >>
>> >
>> >You'll have me in stitches with these yarns.
>> >
>> >piglet
>>
>> What's your point?
>
>That's crewel !

Hey, don't pin me down.

Re: Fluke has lost their mind

<i9sski1c3big5ju6vanl09jkqeq04k7icu@4ax.com>

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From: jl...@650pot.com (john larkin)
Newsgroups: sci.electronics.design
Subject: Re: Fluke has lost their mind
Date: Fri, 10 Nov 2023 10:11:44 -0800
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by: john larkin - Fri, 10 Nov 2023 18:11 UTC

On Thu, 09 Nov 2023 14:58:08 -0800, john larkin <jl@650pot.com> wrote:

>On Wed, 8 Nov 2023 18:12:38 -0500, Phil Hobbs
><pcdhSpamMeSenseless@electrooptical.net> wrote:
>
>>On 2023-11-08 18:08, Phil Hobbs wrote:
>>> On 2023-11-08 14:04, john larkin wrote:
>>>> https://www.amazon.com/Fluke-TL81A-Test-Deluxe-Electronic/dp/B000NI2B6A/ref=pd_lutyp_rtpb_sccl_2_1/142-3653234-3875240?pd_rd_w=8wX1f&content-id=amzn1.sym.9c90becd-3e6e-4609-85c5-d4298ba525ad&pf_rd_p=9c90becd-3e6e-4609-85c5-d4298ba525ad&pf_rd_r=W2VAXEFG42ZY2RN15N9V&pd_rd_wg=Tc99b&pd_rd_r=eca67892-4420-4869-8d8e-145a23c7fb1f&pd_rd_i=B000NI2B6A&th=1
>>>>
>>>>
>>>> Some of their handheld DVMs are over $400.
>>>>
>>>
>>> I paid $275 for an original crispy flavor(*) Fluke 87 in about 1989.
>>
>>I should add that I'm very fond of these DMM probes:
>>
>><https://probemaster.com/8000-series-standard/>
>>
>>Cheers
>>
>>Phil Hobbs
>
>I was just probing a very tight board with a sewing needle.

Imagine cutting the needle in two, splinting it back together but
bridging the gap with a 950 ohm 0603 resistor, and soldering a coax
center to the top end. You now have a tiny many-GHz 10:1 probe.

At most signal levels, such probes don't need a ground.

Re: Fluke has lost their mind

<uin45n$1c6dt$1@solani.org>

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From: ali...@comet.invalid (Jan Panteltje)
Newsgroups: sci.electronics.design
Subject: Re: Fluke has lost their mind
Date: Sat, 11 Nov 2023 05:41:10 GMT
Message-ID: <uin45n$1c6dt$1@solani.org>
References: <oqmnkihbifh09dbgc6crtgr05nas3ls96l@4ax.com> <07c902ed-4618-a66d-72fb-6948154fd038@electrooptical.net> <f3b9f64b-4867-5a6d-8afb-f436c41b92e3@electrooptical.net> <9uoqkilngh0gm9oqputuo37469pr4l12v7@4ax.com> <i9sski1c3big5ju6vanl09jkqeq04k7icu@4ax.com>
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by: Jan Panteltje - Sat, 11 Nov 2023 05:41 UTC

On a sunny day (Fri, 10 Nov 2023 10:11:44 -0800) it happened john larkin
<jl@650pot.com> wrote in <i9sski1c3big5ju6vanl09jkqeq04k7icu@4ax.com>:

>On Thu, 09 Nov 2023 14:58:08 -0800, john larkin <jl@650pot.com> wrote:
>
>>On Wed, 8 Nov 2023 18:12:38 -0500, Phil Hobbs
>><pcdhSpamMeSenseless@electrooptical.net> wrote:
>>
>>>On 2023-11-08 18:08, Phil Hobbs wrote:
>>>> On 2023-11-08 14:04, john larkin wrote:
>>>>>
>>>>> https://www.amazon.com/Fluke-TL81A-Test-Deluxe-Electronic/dp/B000NI2B6A/ref=pd_lutyp_rtpb_sccl_2_1/142-3653234-3875240?pd_rd_w=8wX1f&content-id=amzn1.sym.9c90becd-3e6e-4609-85c5-d4298ba525ad&pf_rd_p=9c90becd-3e6e-4609-85c5-d4298ba525ad&pf_rd_r=W2VAXEFG
>>>>> 42ZY2RN15N9V&pd_rd_wg=Tc99b&pd_rd_r=eca67892-4420-4869-8d8e-145a23c7fb1f&pd_rd_i=B000NI2B6A&th=1
>>>>>
>>>>>
>>>>> Some of their handheld DVMs are over $400.
>>>>>
>>>>
>>>> I paid $275 for an original crispy flavor(*) Fluke 87 in about 1989.
>>>
>>>I should add that I'm very fond of these DMM probes:
>>>
>>><https://probemaster.com/8000-series-standard/>
>>>
>>>Cheers
>>>
>>>Phil Hobbs
>>
>>I was just probing a very tight board with a sewing needle.
>
>Imagine cutting the needle in two, splinting it back together but
>bridging the gap with a 950 ohm 0603 resistor, and soldering a coax
>center to the top end. You now have a tiny many-GHz 10:1 probe.
>
>At most signal levels, such probes don't need a ground.

At decent signal levels probes do not need to connect either...

Re: Fluke has lost their mind

<so6vki18mna03t03sfg0s6i2tfp4ulkcf1@4ax.com>

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NNTP-Posting-Date: Sat, 11 Nov 2023 15:20:44 +0000
From: jl...@997PotHill.com (John Larkin)
Newsgroups: sci.electronics.design
Subject: Re: Fluke has lost their mind
Date: Sat, 11 Nov 2023 07:20:17 -0800
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by: John Larkin - Sat, 11 Nov 2023 15:20 UTC

On Sat, 11 Nov 2023 05:41:10 GMT, Jan Panteltje <alien@comet.invalid>
wrote:

>On a sunny day (Fri, 10 Nov 2023 10:11:44 -0800) it happened john larkin
><jl@650pot.com> wrote in <i9sski1c3big5ju6vanl09jkqeq04k7icu@4ax.com>:
>
>>On Thu, 09 Nov 2023 14:58:08 -0800, john larkin <jl@650pot.com> wrote:
>>
>>>On Wed, 8 Nov 2023 18:12:38 -0500, Phil Hobbs
>>><pcdhSpamMeSenseless@electrooptical.net> wrote:
>>>
>>>>On 2023-11-08 18:08, Phil Hobbs wrote:
>>>>> On 2023-11-08 14:04, john larkin wrote:
>>>>>>
>>>>>> https://www.amazon.com/Fluke-TL81A-Test-Deluxe-Electronic/dp/B000NI2B6A/ref=pd_lutyp_rtpb_sccl_2_1/142-3653234-3875240?pd_rd_w=8wX1f&content-id=amzn1.sym.9c90becd-3e6e-4609-85c5-d4298ba525ad&pf_rd_p=9c90becd-3e6e-4609-85c5-d4298ba525ad&pf_rd_r=W2VAXEFG
>>>>>> 42ZY2RN15N9V&pd_rd_wg=Tc99b&pd_rd_r=eca67892-4420-4869-8d8e-145a23c7fb1f&pd_rd_i=B000NI2B6A&th=1
>>>>>>
>>>>>>
>>>>>> Some of their handheld DVMs are over $400.
>>>>>>
>>>>>
>>>>> I paid $275 for an original crispy flavor(*) Fluke 87 in about 1989.
>>>>
>>>>I should add that I'm very fond of these DMM probes:
>>>>
>>>><https://probemaster.com/8000-series-standard/>
>>>>
>>>>Cheers
>>>>
>>>>Phil Hobbs
>>>
>>>I was just probing a very tight board with a sewing needle.
>>
>>Imagine cutting the needle in two, splinting it back together but
>>bridging the gap with a 950 ohm 0603 resistor, and soldering a coax
>>center to the top end. You now have a tiny many-GHz 10:1 probe.
>>
>>At most signal levels, such probes don't need a ground.
>
>At decent signal levels probes do not need to connect either...

DC coupling and amplitude calibration are sometimes nice.

I've been toying with going into the probe business, fast stuff,
passive resistive and active fet or equivalent. It wouldn't be hard.

Re: Fluke has lost their mind

<bdaf08dc-e643-4c77-b04c-354627af7563n@googlegroups.com>

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Subject: Re: Fluke has lost their mind
From: bill.slo...@ieee.org (Anthony William Sloman)
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by: Anthony William Slom - Sun, 12 Nov 2023 03:28 UTC

On Sunday, November 12, 2023 at 2:21:01 AM UTC+11, John Larkin wrote:
> On Sat, 11 Nov 2023 05:41:10 GMT, Jan Panteltje <al...@comet.invalid>
> wrote:
> >On a sunny day (Fri, 10 Nov 2023 10:11:44 -0800) it happened john larkin
> ><j...@650pot.com> wrote in <i9sski1c3big5ju6v...@4ax.com>:
> >
> >>On Thu, 09 Nov 2023 14:58:08 -0800, john larkin <j...@650pot.com> wrote:
> >>
> >>>On Wed, 8 Nov 2023 18:12:38 -0500, Phil Hobbs
> >>><pcdhSpamM...@electrooptical.net> wrote:
> >>>
> >>>>On 2023-11-08 18:08, Phil Hobbs wrote:
> >>>>> On 2023-11-08 14:04, john larkin wrote:
> >>>>>>
> >>>>>> https://www.amazon.com/Fluke-TL81A-Test-Deluxe-Electronic/dp/B000NI2B6A/ref=pd_lutyp_rtpb_sccl_2_1/142-3653234-3875240?pd_rd_w=8wX1f&content-id=amzn1.sym.9c90becd-3e6e-4609-85c5-d4298ba525ad&pf_rd_p=9c90becd-3e6e-4609-85c5-d4298ba525ad&pf_rd_r=W2VAXEFG
> >>>>>> 42ZY2RN15N9V&pd_rd_wg=Tc99b&pd_rd_r=eca67892-4420-4869-8d8e-145a23c7fb1f&pd_rd_i=B000NI2B6A&th=1
> >>>>>>
> >>>>>>
> >>>>>> Some of their handheld DVMs are over $400.
> >>>>>>
> >>>>>
> >>>>> I paid $275 for an original crispy flavor(*) Fluke 87 in about 1989..
> >>>>
> >>>>I should add that I'm very fond of these DMM probes:
> >>>>
> >>>><https://probemaster.com/8000-series-standard/>
> >>>>
> >>>>Cheers
> >>>>
> >>>>Phil Hobbs
> >>>
> >>>I was just probing a very tight board with a sewing needle.
> >>
> >>Imagine cutting the needle in two, splinting it back together but
> >>bridging the gap with a 950 ohm 0603 resistor, and soldering a coax
> >>center to the top end. You now have a tiny many-GHz 10:1 probe.
> >>
> >>At most signal levels, such probes don't need a ground.
> >
> >At decent signal levels probes do not need to connect either...
>
> DC coupling and amplitude calibration are sometimes nice.
>
> I've been toying with going into the probe business, fast stuff, passive resistive and active fet or equivalent. It wouldn't be hard.

It might not look hard to John Larkin, who is happy to ignore the parallel capacitance of inductors. People who think more rigorously might see more potential problems.

--
Bill Sloman, Sydney

Re: Fluke has lost their mind

<uipq4c$1de3h$1@solani.org>

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From: ali...@comet.invalid (Jan Panteltje)
Newsgroups: sci.electronics.design
Subject: Re: Fluke has lost their mind
Date: Sun, 12 Nov 2023 06:08:12 GMT
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by: Jan Panteltje - Sun, 12 Nov 2023 06:08 UTC

On a sunny day (Sat, 11 Nov 2023 07:20:17 -0800) it happened John Larkin
<jl@997PotHill.com> wrote in <so6vki18mna03t03sfg0s6i2tfp4ulkcf1@4ax.com>:

>On Sat, 11 Nov 2023 05:41:10 GMT, Jan Panteltje <alien@comet.invalid>
>wrote:
>
>>On a sunny day (Fri, 10 Nov 2023 10:11:44 -0800) it happened john larkin
>><jl@650pot.com> wrote in <i9sski1c3big5ju6vanl09jkqeq04k7icu@4ax.com>:
>>
>>>On Thu, 09 Nov 2023 14:58:08 -0800, john larkin <jl@650pot.com> wrote:
>>>
>>>>On Wed, 8 Nov 2023 18:12:38 -0500, Phil Hobbs
>>>><pcdhSpamMeSenseless@electrooptical.net> wrote:
>>>>
>>>>>On 2023-11-08 18:08, Phil Hobbs wrote:
>>>>>> On 2023-11-08 14:04, john larkin wrote:
>>>>>>>
>>>>>>>
>>>>>>> https://www.amazon.com/Fluke-TL81A-Test-Deluxe-Electronic/dp/B000NI2B6A/ref=pd_lutyp_rtpb_sccl_2_1/142-3653234-3875240?pd_rd_w=8wX1f&content-id=amzn1.sym.9c90becd-3e6e-4609-85c5-d4298ba525ad&pf_rd_p=9c90becd-3e6e-4609-85c5-d4298ba525ad&pf_rd_r=W2VAXE
>>>>>>> FG
>>>>>>> 42ZY2RN15N9V&pd_rd_wg=Tc99b&pd_rd_r=eca67892-4420-4869-8d8e-145a23c7fb1f&pd_rd_i=B000NI2B6A&th=1
>>>>>>>
>>>>>>>
>>>>>>> Some of their handheld DVMs are over $400.
>>>>>>>
>>>>>>
>>>>>> I paid $275 for an original crispy flavor(*) Fluke 87 in about 1989.
>>>>>
>>>>>I should add that I'm very fond of these DMM probes:
>>>>>
>>>>><https://probemaster.com/8000-series-standard/>
>>>>>
>>>>>Cheers
>>>>>
>>>>>Phil Hobbs
>>>>
>>>>I was just probing a very tight board with a sewing needle.
>>>
>>>Imagine cutting the needle in two, splinting it back together but
>>>bridging the gap with a 950 ohm 0603 resistor, and soldering a coax
>>>center to the top end. You now have a tiny many-GHz 10:1 probe.
>>>
>>>At most signal levels, such probes don't need a ground.
>>
>>At decent signal levels probes do not need to connect either...
>
>DC coupling and amplitude calibration are sometimes nice.
>
>I've been toying with going into the probe business, fast stuff,
>passive resistive and active fet or equivalent. It wouldn't be hard.

Yes, at lower frequencies OK.
But at several GHz even sticking / touching a needle in the circuit will change everything
depending on needle length for example (part of wavelength, reflections etc).

Amplitude measurements OK at 50 Ohm output.
For DC on a RF point probe with high value resistor (several kOhm SMD) to a cheap meter with high input impedance...

Just whatever you encounter.
Sure an interesting project, could make some money.
I was testing earplugs, need really good ones playing while not freaking everybody out with mistakes I make...
The new Sennheiser sound terrible.. the very old ones are great
The new ones are 50 dollars or more I think,.... Do not even fit my ears.
So crap sells.
I did frequency sweeps to test the output of about 10 different earplugs I have laying about...
Oh man... some are like filters missing whole parts of the audio spectrum.
Could be fakes?
https://arstechnica.com/gadgets/2023/11/sparse-innards-of-25-counterfeit-airpods-pro-revealed-by-ct-scans/
I have not tested any Apple ones, have no Apple stuff, way too expensive. only have real apples and apple pies mmmm!
All those super HiFi things, whatever a fool likes to pay...

Subject	Author
Fluke has lost their mind	john larkin
Re: Fluke has lost their mind	Joerg
Re: Fluke has lost their mind	Liz Tuddenham
Re: Fluke has lost their mind	John Larkin
Re: Fluke has lost their mind	Phil Hobbs
Re: Fluke has lost their mind	Phil Hobbs
Re: Fluke has lost their mind	john larkin
Re: Fluke has lost their mind	Lasse Langwadt Christensen
Re: Fluke has lost their mind	john larkin
Re: Fluke has lost their mind	Phil Hobbs
Re: Fluke has lost their mind	John Larkin
Re: Fluke has lost their mind	Phil Hobbs
Re: Fluke has lost their mind	John Larkin
Re: Fluke has lost their mind	Phil Hobbs
Re: Fluke has lost their mind	Piglet
Re: Fluke has lost their mind	John Larkin
Re: Fluke has lost their mind	Liz Tuddenham
Re: Fluke has lost their mind	john larkin
Re: Fluke has lost their mind	john larkin
Re: Fluke has lost their mind	Jan Panteltje
Re: Fluke has lost their mind	John Larkin
Re: Fluke has lost their mind	Anthony William Sloman
Re: Fluke has lost their mind	Jan Panteltje
Re: Fluke has lost their mind	Martin Rid