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Received my nanoVNA yesterday...which still has a plastic screen protector (and attached tab, below the face plate). I am really tempted to take it off, and noticed one of the Youtube videos where the first thing they did was to remove the four face plate screws and peel it off. Aside from making the screen more vulnerable to scratches, is there any big "watch out" for removing it?

The screen protector in mine looked real ugly, so I got rid of it quick. It also gave me a chance to check out the shields and general workmanship. I didn't see any issues with scratching the screen.

I thought it difficult to see through the OEM protector. I assume that the screen is designed to be "touched", but I use a Palm Pilot, and I see from being with others who also use one that some folks are heavier-handed than others. Just to see what would happen, I put one of my Palm screen protectors on the NanoVNA. It looks good...difficult to see that it is there, except for the /very slightly/ rippled surface when it is held so that light reflects off it (not the way you'd use it)...and the touch screen works as well as it did before I put the protector on...you'd expect that, because it is designed for a touch screen.
--
On the banks of the Piscataqua
Rich NE1EE

I don't think of this as a screen protector. It looks like the film commonly seen on on much newly purchased electronics. I think its just to keep smudges off during final assembly and shipping. The Nano is just unusual (unique?) in that they screw the bezel on over the film. Perhaps the display or electronics sub-assemblies arrived with the film in place and final assembly just adds the battery, standoffs, back cover and bezel without removing the film. I have a couple of these and on one I just worked the film off from under the bezel. On another, I removed the bezel screws - that was easier. If you are a screen protector kind of person, you might do well to buy or salvage one and cut it to size. Real screen protectors are tougher than this film.

The protector is just that, a protector, and even more: it decreases de
efficiency of the capacitive touch screen, so the idea is taking it out at
once. Do you leave the protective film when you get a new phone, of course
not!
Do it and try to move the cursors and you will se what am I talking about.

El mar., 29 oct. 2019 a las 14:23, Joe St. Clair AF5MH (<
saintc@...>) escribió:

I don't think of this as a screen protector. It looks like the film
commonly seen on on much newly purchased electronics. I think its just to
keep smudges off during final assembly and shipping. The Nano is just
unusual (unique?) in that they screw the bezel on over the film. Perhaps
the display or electronics sub-assemblies arrived with the film in place
and final assembly just adds the battery, standoffs, back cover and bezel
without removing the film. I have a couple of these and on one I just
worked the film off from under the bezel. On another, I removed the bezel
screws - that was easier. If you are a screen protector kind of person, you
might do well to buy or salvage one and cut it to size. Real screen
protectors are tougher than this film.

On Tue, Oct 29, 2019 at 11:50 PM, gusagar54 wrote:

The protector is just that, a protector, and even more: it decreases de
efficiency of the capacitive touch screen, so the idea is taking it out at
once.

Different types of protectors exist for plastic screens: One is just meant to protect the plastic screen surface from scratches (and fingerprints) while being handled during manufacturing and transport, the other is meant to protect the screen from scratches during use.
The first type of protector is usually peeled off by the user once he starts using the device, the second type is often applied immediately thereafter. This type of protector was common in the old days, when screen digitizers were resistive. The one in the NanoVNA is resistive, not capacitive. The resistive digitizer consists of two transparent and slightly conductive layers at close proximity but not touching. Pen pressure makes the two layers touch and the resulting resistance pattern across the layers along the X- and Y-axes is determined. The position of touch may be derived from the resistance pattern. Resistive panels need a flexible (plastic) top layer, which is scratch-sensitive. That's why many users of resistive film screens used to apply a replaceable scratch-protection film.
A capacitive touch screen needs just one solid outside surface. It can be made from glass(like) material. The proximity of the finger or a special pen has a capacitive influence and the location is determined by the panel's electronics. The transparent covers that people put on their phone's screens are mostly for shock protection.
All modern telephone and pad touch screens are capacitive.
It's easy to see and feel: A resistive screen (like the NanoVNA's) is visibly deformed (dimpled) when the pen is put onto the surface, whereas with a capacitive screen, no movement is visible.

Raymond

All the NanoVNA devices use resistive touchscreen devices so it is irrelevant if you leave it on or take it off. However, replacing it with a real screen protector is always a good idea.?
... Larry



On Tue, 29 Oct 2019 at 6:50 PM, gusagar54<gusagar@...> wrote: The protector is just that, a protector, and even more: it decreases de
efficiency of the capacitive touch screen, so the idea is taking it out at
once. Do you leave the protective film when you get a new phone, of course
not!
Do it and try to move the cursors and you will se what am I talking about.

El mar., 29 oct. 2019 a las 14:23, Joe St. Clair AF5MH (<
saintc@...>) escribió:

I don't think of this as a screen protector. It looks like the film
commonly seen on on much newly purchased electronics. I think its just to
keep smudges off during final assembly and shipping. The Nano is just
unusual (unique?) in that they screw the bezel on over the film. Perhaps
the display or electronics sub-assemblies arrived with the film in place
and final assembly just adds the battery, standoffs, back cover and bezel
without removing the film. I have a couple of these and on one I just
worked the film off from under the bezel. On another, I removed the bezel
screws - that was easier. If you are a screen protector kind of person, you
might do well to buy or salvage one and cut it to size. Real screen
protectors are tougher than this film.

Raymond Domp Frank wrote:

Resistive ... Pen pressure makes the two layers touch

I have found that the best and most accurate pointing device to use with the Nano is the stylus from an old Panasonic Toughbook. That was a hardened laptop series that are being recycled of late in favour of cell phones and "phablets" and the like. (Toughbooks are the kind of machine you see bolted to the hump between front seats in a police cruiser; 6 kilos or more of tough-as-nails machine, you can truly drop-kick one and expect to pick it up working. I have salvaged several, they take Linux a treat once you disable the weird touchscreen, and I am writing this email on one....)

Sharpish point. Medium-density plastic. They are fine-pointed enough to be very precise on these small screens. MUCH better than the foam-tipped sort, which require a lot of pressure to work at all, and make a much-too-large contact area (not a very precise result).

Same sort of stylus was used in old PalmPilot PDA devices. Haunt the thrift stores and re-use shops, you can often get a first or second generation Palm for less than five bucks. Steal the stylus for your Nano, yank the battery to recycle at the battery store, and toss the rest to the electronics recycler.

(Told you I was "one of those." Drive a Prius, too.)

--
W Will
N9KDY

So does anybody have a link to where to get screen protectors?

I've just had to order a new screen for my NanoVna.

In the USA the Dollar Tree stores often have large screen protectors
that are labeled for some device but may be adapted ...? kd4e

On 30.10.2019 04:08, Terry VK5TM wrote:

So does anybody have a link to where to get screen protectors?

Get screen protector for any cell phone that is large enough and then cut it to right size for NanoVNA.

--
73,
Pedja YT9TP

Checkout:

Thanks.

Having a really good? day full of seniors moments.

Did exactly as above and got one for a phone to cut up when the new screen arrives.

--
Terry VK5TM
( )