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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?

On Mon, Jun 3, 2024 at 08:47 AM, <torito1774@...> wrote:

it detects levels of up to 2,500 ?W/m? of RF signals when placed close to the TinySA Ultra's antenna.

Maybe it does, but have you calculated just how low a value of radiated power that equates to ?



It is miniscule.

Regards,

Martin

On Mon, Jun 3, 2024 at 01:47 AM, <torito1774@...> wrote:

This presents a double trouble. Firstly, it might give false positives by detecting it's own signals, I mean how can we measure RF signals when the measuring device emits signals at the very same time? Secondly, and this is also a main concern for me, as an electro hypersensitive person I bought this device in order to detect RF signals to be able to avoid them as they make me sick, but this device generates more RF pollution than the one I'm trying to avoid in the first place. Maybe someone has a solution on how to desactivate the generated signals.

Can you test if enabling the build-in LNA (LEVEL/LNA) suppresses this leakage sufficiently?

--

Hello guys,
My new TinySA Ultra generates signals while sweeping. I have a Safe and Sound Pro II meter and it detects levels of up to 2,500 ?W/m? of RF signals when placed close to the TinySA Ultra's antenna. This presents a double trouble. Firstly, it might give false positives by detecting it's own signals, I mean how can we measure RF signals when the measuring device emits signals at the very same time? Secondly, and this is also a main concern for me, as an electro hypersensitive person I bought this device in order to detect RF signals to be able to avoid them as they make me sick, but this device generates more RF pollution than the one I'm trying to avoid in the first place. Maybe someone has a solution on how to desactivate the generated signals. Some help from Erik would be nice. I attached 2 videos but I can send provide more on request

On Sun, Jun 2, 2024 at 06:24 AM, <undeclarede@...> wrote:

I use TinySA in environment very close to speakers that produce magnetic field and currents and have concerns how speakers can affect measurements of TinySA?
Should it be isolated from such sources or it doesn't matter?
Thank you!

Erm, no.

Thankfullly no magnetic tape is used in the Tiny SA / Ultra ;-)

- Andy -

On Sun, Jun 2, 2024 at 12:15 AM, <undeclarede@...> wrote:

Thank you! Does it mean that having a speaker connected to TinySA will introduce some kind of interference??

Normally not, unless the amplifier of the speaker is a bad class D (digital) amplifier

In one of your video tutorial there was mentioned that TinySA connected to PC via usb cable can also affect measurements. And now I’m curious to understand more:

This only happens when you connect a antenna or an E-field sensor, not if you use a coax to connect to a source

- does connected headphones affect measurements??

No

- is it technically possible to replace headphones with a speaker and preserving correctness of measurements or having very small interference? For instance, wire a small (1W) speaker through amplifier which is powered from mainboard of TinySA (VCC and GRND connectors)?

Should be OK when using an analog amplifier, not one of those cheap 5 V digital amplifiers

?
--

Thank you! Does it mean that having a speaker connected to TinySA will introduce some kind of interference??

In one of your video tutorial there was mentioned that TinySA connected to PC via usb cable can also affect measurements. And now I’m curious to understand more:
- does connected headphones affect measurements??

- is it technically possible to replace headphones with a speaker and preserving correctness of measurements or having very small interference? For instance, wire a small (1W) speaker through amplifier which is powered from mainboard of TinySA (VCC and GRND connectors)?

Thanks!

As long as the tinySA is not electrically connected to the speaker there should be no problem
--

I use TinySA in environment very close to speakers that produce magnetic field and currents and have concerns how speakers can affect measurements of TinySA?
Should it be isolated from such sources or it doesn't matter?
Thank you!

Mine was the latest for one device and the other would have been the latest if not for an update between ordering and delivery. I had not even considered that he would have done that (thought that stock was just so recent) although now that you say that, it makes sense that he has gone that extra mile.
That just says how much he prides himself on giving the customer the absolute best customer service possible.

Paul

Always my first choice when (increasingly!) I can't face another round of 'Chinese Radio Thing' Seller Roulette

?

Always fast service and never a problem ?

I got mine from Mirfield too , I think about early 2023 ?

NO problem at all, arrive within one working day (fast),
and has undergone all the firmware upgrades without
issue.

Mine came with firmware at the time that had only been
released a few days earlier, so I guess that before despatch
he makes sure that the firmware is always the latest.

He obviously takes pride in his service.

73 de Andy

I totally agree with you Tate,
The service that I got from Martin both times that I bought through him really needed some recognition. I have of course emailed him to say how outstanding his service has been, but really wanted to put something somewhere others would see it. I hoped that here would be the right place to do so and also the right thing to do. We are all too quick to complain about service we get, but very few of us say anything when we get good service, and he deserves to be recognised for that.
like I said, if not here then there is nowhere else to do it.

Paul

Let me start by saying that I don't know if this is the right place to post this, but if not here then I don't know where else.

I have purchased both the tinySA ULTRA and the nanoVNA H4 from Mirfield Electronics and couldn't be more pleased with the service that I received both times.
Martin Stokes G3ZXZ is one of the nicest and most informative people that I have ever dealt with. The service he provides is second to none and I would suggest that everyone in the UK uses him.
I am not affiliated or being paid to post this in any way. I am just a very happy customer and service like he has provided me needs to be recognised in some way and this was the only way that I could think of doing it.

His website is

Thank you again Martin.
I do hope that you are on here and see this.

All the best
Paul

One other tip. Make sure that you mark with something like a sharpie which side is the one that attaches to the screen, otherwise you will lose track of it and it won’t stick properly.?

Paul

On Fri, May 31, 2024 at 03:15 AM, Bruce Hawkins wrote:

Hi There.?

?

?I was wondering about cutting my own screen protectors for a ham radio with a screen I can't read in the sunlight in my car.? I guess I'll find some that are anti reflective.? As that's what I need.? It's an old Kenwood vhf low band with shinny LCD screen.

Can I get a link so I know what you got?

Regards to my sa.? I just keep mine in a camera bag with my vna. Hopefully they'll stay safe.

?

Best regards, Bruce Hawkins - AC6DN.? Sent from my Android phone.? And from: ac6dn@...

?

I use a screen protector on the SA Ultra and Tiny VNA. ?It’s what I found at the thrift store for $1. ?Trimmed them down and stuck them on. ?They both work great. ?Just keep them away from the edge of the screen by 1/32”. ? There is nothing to touch at the edge anyway. ?I always use the plastic stylus and have no problems at all. ?Very happy I did it and easily replaced. ?