Re: TinySA Ultra generates signals while sweeping
On Mon, Jun 3, 2024 at 08:28 PM, W0LEV wrote:
Maybe it would light an NE-2?
?
Certainly you know what those are??
Yes one of my earliest encounters with those small neons, was a ballroom ceiling with thousands of them wired up as simple oscillators, to create a twinkling effect. https://en.wikipedia.org/wiki/Pearson%E2%80%93Anson_effect But to answer your main question, maybe, Maybe not... I think you would have to extend the wires on it to stand a chance of it striking up. Fluorescents tend to work better, as they are physically a greater proportion of a wavelength. Regards, Martin
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Re: TinySA Ultra generates signals while sweeping
On Mon, Jun 3, 2024 at 08:32 PM, daniel grafflin wrote:
could not even detect or affect em fields 500Mw per Cm/2
Err... Did you mean Mw or is that a typo ?
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Re: TinySA Ultra generates signals while sweeping
In a test done at Harvard university, several persons thinking they are hypersensitive to em, could not even detect or affect em fields 500Mw per Cm/2
?Clearly, this is a tin foil hat case.
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Re: TinySA Ultra generates signals while sweeping
Maybe it would light an NE-2?
Certainly you know what those are??
Dave - W?LEV
Did you forget to set it to "vibrate"?
On Mon, 03 Jun 2024 12:02:12 -0700
"Andy G0FTD via " <punkbiscuit=[email protected]> wrote:
> On Mon, Jun 3, 2024 at 07:07 PM, Bruce Hawkins wrote:
>
> > I'd still would not store the unit turned on, between your legs.?
>
> In search of a cheap thrill I just stuffed my Tiny SA Ultra in my
> pants.
>
> Nothing happened.
>
> I want a refund ;-)
>
> 73 de Andy
--
73
-Jim
NU0C
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Re: TinySA Ultra generates signals while sweeping
On Mon, Jun 3, 2024 at 08:34 PM, Jim Shorney wrote:
>Did you forget to set it to "vibrate"?
I couldn't find it in the menu.
Maybe the next firmware update will fix it ? ;-)
73 de Andy
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Re: TinySA Ultra generates signals while sweeping
Did you forget to set it to "vibrate"? On Mon, 03 Jun 2024 12:02:12 -0700 "Andy G0FTD via groups.io" <punkbiscuit@...> wrote: On Mon, Jun 3, 2024 at 07:07 PM, Bruce Hawkins wrote:
I'd still would not store the unit turned on, between your legs. In search of a cheap thrill I just stuffed my Tiny SA Ultra in my
pants.
Nothing happened.
I want a refund ;-)
73 de Andy -- 73 -Jim NU0C
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Re: TinySA Ultra generates signals while sweeping
Rabbit holes are for rabbits.? Rabbit holes are not for thinking intelligent humans.? That is, unless you require an exercise in frustration and pulling your hair out (us fossils don't have to indulge in the latter - nature takes care of that for us).?
Dave - W?LEV ?
Not to mention all of the above ground nuclear testing during the late 1940's thru the 1960's prior to the nuclear test ban treaty!
Sam Reaves
ARS W3OHM
Owner / Moderator of: LeCroy Owners Group on Groups.io
Sencore Owners Group on Groups.io Sprint Layout Group on Groups.io?? Pulsonix EDA Group on Groups.io
LPKF Owners Group on Groups.io
Electronics and Mechanical Hardware Design Engineering Manager
Staff Scientist Andritz Rolls Global Research Center (RETIRED)
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Re: TinySA Ultra generates signals while sweeping
Let's not go down the aluminum hat rabbit hole again.
If one reads the warnings that come in the instruction book (which no one reads.....) of every cell and smart phone, there is stated in bold letters a minimum distance from which to space the phone from living and breathing flesh.? Does anyone ever read and if so, heed these warnings?? Probably not.??
And further, if you're an amateur radio operator who uses an HT on any of our VHF/UHF/and ?W bands, all of them fail the FCC and UK RF exposure levels.? Run the numbers yourself.? For both the US and UK, the ARRL and RSGB provide a handy online calculator.? Do we cane?? Probably not.
So, let's not go down the rabbit hole, once again.? We've been there many times before on these groups.
Dave - W?LEV?
The Lo leakage is scientifically measurable, but imposable to effect you.? I'd still would not store the unit turned on, between your legs.? Nor any electronics.?? RF radiation hazard is about proximity to it.? I forgot the math.? But if I remember correctly, the level is reduced by 4 times every foot. At some point, everything radiates something very little.
Cellphons with all wireless turned off, your pc with no wireless installed, every piece of electronics radiates something. And often at frequencies one could call RF. But at extremely low levels.
I could go on about why people are getting more cancers.? But it's mostly about, what were exposed to other than RF.? For example: Foods we eat. Chemicals were exposed to.? The fact that the magnetic poles are beginning to shift and have been weakening for may decades. That the sun is changing it's output.? Grater exposure to actual radiation.? Somewhere at the bottom of the list is all things that radiate at low and higher frequencies and power levels (intentional and unintentional radiators).
Again, it's about distance and time in the RF field.
I'm retired from the RF electronics field.? I did FCC and other countries version of the FCC's testing.? Low hf frequencies to microwave.? I also made antennas for the same frequency range.
So, I'm familiar with this subject.
Good luck...
Best regards, Bruce Hawkins - AC6DN.? Sent from my Android phone.? And from: ac6dn@...
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Re: TinySA Ultra generates signals while sweeping
On Mon, Jun 3, 2024 at 07:07 PM, Bruce Hawkins wrote:
> I'd still would not store the unit turned on, between your legs.?
In search of a cheap thrill I just stuffed my Tiny SA Ultra in my
pants.
Nothing happened.
I want a refund ;-)
73 de Andy
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Re: TinySA Ultra generates signals while sweeping
Let's not further confuse the issue WRT Ionising and Non-Ionising radiation.
Some folks are already scared enough...
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Re: TinySA Ultra generates signals while sweeping
Apparently photographic film across America, all a sudden, had unwanted spots and anomalies on them.? There was a recall of film access the us.? I think this was in the 1960's. This due to the above ground testing of those devices.? That's a more serious level exposer.? Maybe that's what's wrong with me?
Best regards, Bruce Hawkins - AC6DN.? Sent from my Android phone.? And from: ac6dn@...
On Jun 3, 2024 1:21 PM, Sam Reaves <sam.reaves@...> wrote: Not to mention all of the above ground nuclear testing during the late 1940's thru the 1960's prior to the nuclear test ban treaty!
Sam Reaves
ARS W3OHM
Owner / Moderator of: LeCroy Owners Group on Groups.io
Sencore Owners Group on Groups.io Sprint Layout Group on Groups.io?? Pulsonix EDA Group on Groups.io
LPKF Owners Group on Groups.io
Electronics and Mechanical Hardware Design Engineering Manager
Staff Scientist Andritz Rolls Global Research Center (RETIRED)
|
Re: TinySA Ultra generates signals while sweeping
Not to mention all of the above ground nuclear testing during the late 1940's thru the 1960's prior to the nuclear test ban treaty!
Sam Reaves
ARS W3OHM
Owner / Moderator of: LeCroy Owners Group on Groups.io
Sencore Owners Group on Groups.io Sprint Layout Group on Groups.io?? Pulsonix EDA Group on Groups.io
LPKF Owners Group on Groups.io
Electronics and Mechanical Hardware Design Engineering Manager
Staff Scientist Andritz Rolls Global Research Center (RETIRED)
|
Re: TinySA Ultra generates signals while sweeping
On Mon, Jun 3, 2024 at 04:31 PM, josephlevy wrote:
It's the LO sweeping ,coming via mixer leakage.
A LNA will get it way down (reverse isolation) which Erik already hinted at...
I just checked mine
Preamp off and no attenuation -60dBm.
That is such a small value, that most of the on-line RF power convertors indicate it as 0 watts, because they can't show enough zeros behind the decimal point. To put this in further context, Broadcast FM radio signals generally produce signal levels of around -50dBm inside their coverage area.
Preamp on and no attenuation -90dBm. An even smaller value.
Digital noise when sweeping -65dBm
Adding input attenuation reduces the leakage by the same amount of attenuation that is applied.
A lot of these instruments just scare people, by either not working as advertised, or by showing that something is present, without quantifying if it is likely to be dangerous.
I have worked on high power transmitter sites throughout my life, and some were working at power levels sufficient to light up a small fluorescent tube, without any other connection to a power supply. RF exposure is problematic, and can be dangerous, but NOT at the power levels you are observing, by a factor of several million.
If you are worried about RF exposure, then please try to better understand what you are measuring, and the associated power levels you are observing.
Regards,
Martin
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Re: TinySA Ultra generates signals while sweeping
The Lo leakage is scientifically measurable, but imposable to effect you.? I'd still would not store the unit turned on, between your legs.? Nor any electronics.?? RF radiation hazard is about proximity to it.? I forgot the math.? But if I remember correctly, the level is reduced by 4 times every foot. At some point, everything radiates something very little.
Cellphons with all wireless turned off, your pc with no wireless installed, every piece of electronics radiates something. And often at frequencies one could call RF. But at extremely low levels.
I could go on about why people are getting more cancers.? But it's mostly about, what were exposed to other than RF.? For example: Foods we eat. Chemicals were exposed to.? The fact that the magnetic poles are beginning to shift and have been weakening for may decades. That the sun is changing it's output.? Grater exposure to actual radiation.? Somewhere at the bottom of the list is all things that radiate at low and higher frequencies and power levels (intentional and unintentional radiators).
Again, it's about distance and time in the RF field.
I'm retired from the RF electronics field.? I did FCC and other countries version of the FCC's testing.? Low hf frequencies to microwave.? I also made antennas for the same frequency range.
So, I'm familiar with this subject.
Good luck...
Best regards, Bruce Hawkins - AC6DN.? Sent from my Android phone.? And from: ac6dn@...
On Jun 3, 2024 11:31 AM, "josephlevy via groups.io" <josephlevy@...> wrote: Hi people
It's the LO sweeping ,coming via mixer leakage.
A LNA will get it way down (reverse isolation) which Erik already hinted at...
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Re: TinySA Ultra generates signals while sweeping
Have you put two Safe and Sound Pro II devices side-by-side to quantify the RFI emissions from your Safe and Sound Pro II? I mean, as an electro hypersensitive person, you could quite possibly be made sick by your Safe and Sound Pro II device as opposed to the TinySA.
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Re: TinySA Ultra generates signals while sweeping
Also look up the "Gibbs Phenomenon", which illustrates how a square wave is constructed fom the addition together of a sine wave and it's odd harmonics. The more harmonics, the closer the result is to a square wave. DaveD KC0WJN
============================== All spelling mistakes are the responsibilty of the reader (Rick Renz, STK, ca. 1994) ==============================
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On Jun 3, 2024, at 12:11, W0LEV via groups.io <davearea51a@...> wrote:
? Anything and everything digital generates RF energy, sometimes at high levels.? Sweep your PC or laptop.? Yes, it generates and radiates lots of RF energy.? Even your smart phone intentionally generates and intentionally radiates RF energy.? Digital circuitry runs on square waves.??
What does it take to generate a square wave (other than a saturated linear circuit)?? Consult Mr. Fourier.? If you don't know, look up Mr. Fourier. ? If your 2 GHz clock "powering" your ?processor generated only 2 GHz, that would be a sine wave, not a square wave.? Not so for digital circuitry.? Again, have a read under Mr. Fourier and specifically the Fourier Series.? You'll learn something.
Dave - W?LEV
Dave - W?LEV
An RF related device which has a microprocessor running at RF frequencies and RF generating components which emits finite amounts of RF.
Who would have thunk it?
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Re: TinySA Ultra generates signals while sweeping
Hi people
It's the LO sweeping ,coming via mixer leakage.
A LNA will get it way down (reverse isolation) which Erik already hinted at...
|
Re: TinySA Ultra generates signals while sweeping
Anything and everything digital generates RF energy, sometimes at high levels.? Sweep your PC or laptop.? Yes, it generates and radiates lots of RF energy.? Even your smart phone intentionally generates and intentionally radiates RF energy.? Digital circuitry runs on square waves.??
What does it take to generate a square wave (other than a saturated linear circuit)?? Consult Mr. Fourier.? If you don't know, look up Mr. Fourier. ? If your 2 GHz clock "powering" your ?processor generated only 2 GHz, that would be a sine wave, not a square wave.? Not so for digital circuitry.? Again, have a read under Mr. Fourier and specifically the Fourier Series.? You'll learn something.
Dave - W?LEV
Dave - W?LEV
An RF related device which has a microprocessor running at RF frequencies and RF generating components which emits finite amounts of RF.
Who would have thunk it?
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Re: TinySA Ultra generates signals while sweeping
EVERY device that contains digital electronics will emit a tiny amount of RF. That includes the calculator sitting on your desk, the quartz clock hanging on the wall, your digital camera, any alarm clock with digits, and the list goes on. There does not have to be any "radio" involved. Not to mention the radiation (gasp!) we all get every day from broadcast stations, paging systems, police/fire/ambulance radios, weather radar, vehicle collision avoidance systems, cell phones, etc. Even your kitchen Farady cage (microwave oven) will have a teeny tiny amount of leakage. We are awash in EM fields. And this is not a new thing. Jupiter for example emits radio waves that are detectable on shortwave receivers. The sun does as well. Analog radio receivers also radiate RF. The inverse square-law is our friend here. 73 -Jim NU0C On Mon, 03 Jun 2024 08:43:34 -0700 "Matt Harris via groups.io" <kd4pbs@...> wrote: An RF related device which has a microprocessor running at RF frequencies and RF generating components which emits finite amounts of RF.
Who would have thunk it?
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Re: TinySA Ultra generates signals while sweeping
An RF related device which has a microprocessor running at RF frequencies and RF generating components which emits finite amounts of RF.
Who would have thunk it?
|
Jim Shorney
Sam Reaves