I was deciding whether to answer you
It has been 2hrs, with no answers…
Take this for what it is
You asked about the RSP and Ikea Rothult lock
I have tested a MFGC V2.1 (similar size as the RSP) on a Rothult Chinese knock off
Yes it was a significant improvement and would read an xSeries.
Obviously not a direct comparison, but hopefully gives you an idea until somebody can answer your ACTUAL question
Havent used the DT style one, but yes it should work fine on the Rothult. i use mine daily.
Eh, I said “style” so you’re exactly in the ball park I meant,
Cool… I can’t remember what currently… but I wanted to use some of those for various projects but was always bad at their poor/useless implant performance
What I read:
What I’m hearing is… both
i didnt want to peel off the one i have on my door. functionally they are almost identical so i see no reason why it wont work.
Because we (being a curious group of… us) are who we are, has anybody tried stacking two or more to see the effects? Maybe with 1/4" to 19mm separation?
And am I the only one who imagines someone setting up a line of carefully spaced stickers to see just how far they can go? 
One of the first things I did. You can sometimes get a read if you do two but it has a failure rate that is pretty high. It isn’t reliable at all.
Every sticker introduces a signal delay, so eventually the readers either times out waiting for a response or the data becomes desynchronized and invalid
I’ve got one of Hamspiced’s PCB repeaters in the top right corner as it’s the only spot there’s space on a 13.
It has made my Apex usable from being a nightmare previously.
That’s where I currently have it. It’s not perfect, but it works 1 out of maybe 10 times. Better than zero.
NOT the first thing I tried (With Hammys V2.1) But did try whilst using a VNA.
I got 2 distinct troughs forming a tight “W”
Left trough slightly low, right trough bang on 13.56MHz
So my observation was not that of an increased depth of trough, but rather a slightly wider frequency read range.
None of this was particularly scientific, more slapped on to see what would happen, and that was my result
Haha, is that called a mixed metric-phor???
Think of it as more of an effort to blur your lines until one day you too see the Glory of the Imperial System.
haha, I love that you used IMPERIAL which is Evil, and what I love even more is the Darth Vader gif, ESPECIALLY since Darth Vader ends up “seeing the light”
So I guess that means youll be joining the 96% of the world with metric…
But my guess is, That’ll happen when Star Wars is good again…
I also love how awesome at derailling we are
Woooo Wooooo!!!
Just ordered a pack of these. Looking forward to trying them out on my chameleon ultra.
These arrived yesterday. Installed some. They are certainly worth it.
Please excuse my ignorance but I would love to have a RFID extender for the 125s as well. Is this possible? I can see myself installing them under some of the lesser powered readers at work!
It might be possible using a whole lot of wire… maybe with like a 6 layer PCB… it just requires a lot more inductance.
The Qi receiver uses a 4 layer rigid PCB and at 25mm diameter I was able to get 20uH. That means I’d need 81nF of capacitance to tune it to 125kHz. That would have a really low Q factor and the performance would be poor I think.
If we switched to flex so the windings are closer and made a 6 layer I might be able to get a couple hundred microhenries, which would be a lot better. That antenna routing would be very…interesting 
Unfortunately it would be 4 times the thickness and 7 times the cost per unit, so we’d really have to commit to that, especially with development time and buying multiple tuning revisions.
I would certainly buy at least 5, if you are looking for possible investors.
Yeah I mean I appreciate that, but we’re talking about minimum of $600 for each tuning revision of the minimum order quantity, and $2300 for 1000 units after that is done. That’s not even including labor for engineering. Even if you paid $20 per unit (which I would consider high) and ordered 5, that wouldn’t put even a small dent in the development costs. That’s the big problem we have