¿ªÔÆÌåÓý

Date

Re: TinySA Ultra generates signals while sweeping

 

I apologize, Erik, I did not see your warning until reading past the posts to which I referred my latest replies.

Indeed there is some interesting effects as of late on the HF bands which one can see on a SpecAn.? Another amateur radio operator friend likened the solar storms to creating ripples in a pond when it bombards the ionosphere with radiation.? Listening to HF, one can visualize and correlate the effect keenly using that analogy.


Re: TinySA Ultra generates signals while sweeping

 

The government may not want you to know, but this information is available online: we are subjected daily, for many hours, to a 1500 W/m^2 (yes, Watts with a capital W) source of mostly Terahertz and above frequencies.
It was also observed to emit radio waves in VLF to HF spectrum, a lot of ionizing radiation, bunch of charged particles and even neutrinos which pierce your body by the billions as we speak.
I attribute some of my eye and skin damage to it, confirmed by doctors. Talk about horrors.

So now we're claiming that exposure to sunlight causing cancer is a government coverup, an inert, massless, nearly unidetectable particle which has existed since long before humans walked the Earth is the cause of all ailments, and some nebulous "It" is nefariously bombarding us with non-ionizing radiation to cause us harm - all "confirmed" by a "professional" who is not an expert in such matters?

I would have to agree on one level; as we age, our eyesight and skin deteriorates - again, who'da thunk it?.? I simply must blame the aging process on a government coverup!

I really must invest in more stock in ALCOA.

This group has been one of my favorites!? And to think, had I not purchased a TinySA Ultra, I would never have been so enlightened!


Re: TinySA Ultra generates signals while sweeping

 

Apparently the subliminal sarcasm font I used did not make it through the Groups.io interface. ;)


Re: TinySA Ultra generates signals while sweeping

 

On Tue, Jun 4, 2024 at 05:10 AM, Jim Shorney wrote:
Some of these emissions can be observed with a TinySA.
Indeed, the Sun is quite 'volatile' at the moment, so it is a good opportunity to observe Solar radio bursts.

With a TinySA connected to simple wire dipole, approx 10ft / 3m per 'leg' and setup to sweep from 20 to 100MHz with the waterfall on, it should be possible to see occasional bursts, looking like swathes of broadband noise, lasting from just a few seconds to several minutes in duration.

Something like this recorded on my KiWi sdr, setup for reception of 20 to 60MHz




It is also possible to detect noise from Jupiter, but these are a bit more elusive.

Another project is to use a satellite dish and LNB connected to a TinySA in order to make celestial noise measurements.

There are many other radio astronomy projects that can be undertaken with a Tiny SA, but these are perhaps the easiest to start with.

Regards,

Martin


Re: TinySA Ultra generates signals while sweeping

 

Some of these emissions can be observed with a TinySA.

On Mon, 03 Jun 2024 17:02:47 -0700
"vbifyz via groups.io" <3ym3ym@...> wrote:

The government may not want you to know, but this information is available online: we are subjected daily, for many hours, to a 1500 W/m^2 (yes, Watts with a capital W) source of mostly Terahertz and above frequencies.
It was also observed to emit radio waves in VLF to HF spectrum, a lot of ionizing radiation, bunch of charged particles and even neutrinos which pierce your body by the billions as we speak.
I attribute some of my eye and skin damage to it, confirmed by doctors. Talk about horrors.

73, Mike AF7KR
--

73

-Jim
NU0C


Re: TinySA Ultra generates signals while sweeping

 

This topic runs the risk of being closed.
Please limit replies only to technical relevant content.
--
Designer of the tinySA
For more info go to https://tinysa.org/wiki/


Re: TinySA Ultra generates signals while sweeping

 

¿ªÔÆÌåÓý

Back to the NE-2 light saber. M-a-n-y years ago, working for GE, one of our super tech challenged some of us 'newbies' to the properties of the infamous ne-2 and the destructive power of a photo gun (flashlight). Kids, don't try this at home we are professionals, yeah, right.? Take said ne-2, in normal light, with appropriate resistor and run up a DC supply until the ne-2 just fires. Note the voltage, ACCURATELY. Now redo the run-up, only this time without the resistor AND (pay attention here) keep the ne-2 in total darkness setting the voltage a few milivolts higher than with the resistor. (If it explodes, you went too far) OK, all set. Now with the ne-2 under a protective cover and in the dark, shine a flashlight on the ne-2. The next sound is proof of the ionization of the photo gun (flashlight) True story, lots of fun. I still have my eyesight, hearing? not so good.

Mike C. Sand Mtn GA

?? ?

On 6/3/2024 8:02 PM, vbifyz wrote:

The government may not want you to know, but this information is available online: we are subjected daily, for many hours, to a 1500 W/m^2 (yes, Watts with a capital W) source of mostly Terahertz and above frequencies.
It was also observed to emit radio waves in VLF to HF spectrum, a lot of ionizing radiation, bunch of charged particles and even neutrinos which pierce your body by the billions as we speak.
I attribute some of my eye and skin damage to it, confirmed by doctors. Talk about horrors.

73, Mike AF7KR


Re: TinySA Ultra generates signals while sweeping

 

The government may not want you to know, but this information is available online: we are subjected daily, for many hours, to a 1500 W/m^2 (yes, Watts with a capital W) source of mostly Terahertz and above frequencies.
It was also observed to emit radio waves in VLF to HF spectrum, a lot of ionizing radiation, bunch of charged particles and even neutrinos which pierce your body by the billions as we speak.
I attribute some of my eye and skin damage to it, confirmed by doctors. Talk about horrors.

73, Mike AF7KR


Re: TinySA Ultra generates signals while sweeping

 

And what determines "far field"??? In rigorous terms, when the propagating wave impedance becomes purely resistive:? 377- or 120¦Ð ohms.? Within the discipline of EMC/RFI we usually hang our hats on [2D^2] / wavelength (in free space).? D is the largest dimension of the EUT (including cables).? The wavelength must be in the same units (feet, cm, inches, kilometers......) as D.? Personally I hang my hat on 10 X the freespace wavelength.?

I'll bet your instrument placed at these criteria distances from the TinySA doesn't measure anything?!

If it does, you better cloth yourself with a conductive suite of clothing and wear a double layered aluminum hat completely covering your head except for your eyes.? And be absolutely sure the eye openings are less than 10% of a wavelength at the highest emitted frequency.

Dave - W?LEV


On Mon, Jun 3, 2024 at 9:34?PM Donald Kirk via <wd8dsb=[email protected]> wrote:
Hi Torito,

I just watched a video regarding the Safe and Sound Pro 2 instrument and it specifically says it¡¯s intended for far field measurements which would make you believe it¡¯s been calibrated when located in the far field relative to the source.

Based on your video your Safe and Sound Pro 2 is located much too close to the source (the TinySA) so the measured field values are most likely incorrect.? You would need to make sure the unit is located in the far field for the measured field levels to be correct.

Just FYI,
Don wd8dsb



--
Dave - W?LEV



Re: TinySA Ultra generates signals while sweeping

 

On Mon, Jun 3, 2024 at 09:34 PM, Donald Kirk wrote:
your Safe and Sound Pro 2 is located much too close to the source (the TinySA) so the measured field values are most likely incorrect.
It is, and the values will be inaccurate as a result of the proximity, but if you convert the power density to something more understandable, you will see that it is still a fraction of practically nothing...


Re: TinySA Ultra generates signals while sweeping

 

Hi Torito,

I just watched a video regarding the Safe and Sound Pro 2 instrument and it specifically says it¡¯s intended for far field measurements which would make you believe it¡¯s been calibrated when located in the far field relative to the source.

Based on your video your Safe and Sound Pro 2 is located much too close to the source (the TinySA) so the measured field values are most likely incorrect. ?You would need to make sure the unit is located in the far field for the measured field levels to be correct.

Just FYI,
Don wd8dsb


Re: TinySA Ultra generates signals while sweeping

 

On Mon, Jun 3, 2024 at 09:54 PM, Martin wrote:
Fluorescents tend to work better, as they are physically a greater proportion of a wavelength.
Back in the day there were a few of us with 100w 2m band mobile
rigs in our cars sitting in a local with these lamps.

Keying the rigs would result in a light sabre effect and we messsed about with
pretend Star Wars fights much to the amusement of passers by / local cops.

Oh we had good fun back then.

73 de Andy


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


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 ?


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.


Re: TinySA Ultra generates signals while sweeping

 

Maybe it would light an NE-2?

Certainly you know what those are??

Dave - W?LEV



On Mon, Jun 3, 2024 at 7:34?PM Jim Shorney via <jimNU0C=[email protected]> wrote:

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







--
Dave - W?LEV



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


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


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 ?

Virus-free.


On Mon, Jun 3, 2024 at 6:22?PM Sam Reaves via <sam.reaves=[email protected]> 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)



--
Dave - W?LEV



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?

Virus-free.


On Mon, Jun 3, 2024 at 6:07?PM Bruce Hawkins via <ac6dn=[email protected]> wrote:
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 " <josephlevy=[email protected]> 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...



--
Dave - W?LEV