LF Proxmark Antenna Design


I’ve just got around to implanted a LF RFID tag, and I noticed Dangerous Things sold a Proxmark3 antenna suited to the xEM in past. I was wondering if you had the antenna design, as I assume they’re now out of stock, so I can make my own (I’m having some issues with the proxmark reading my tag). I’ve got access to a significant quantity of transformer winding wire in most sizings, so that won’t be an issue.