Great job very interesting... always nice to see other people’s work. I have had great results mag loops especially with a vacuum capacitor and ferrite core coupling. Vacuum capacitor seems to give more wide bandwidth and ferrite cores gets your SWR down lowest level. Now I’m looking for a good remote control method this looks like it could be perfect. Does it sense SWR and calibrate the loop accordingly?
Thank you Yes you can sense SWR with a small addition to the board. There is a connector named vswr on the board for that purpose. Then it can work in full automatic mode. Take a look at Lofturs documentation. Second pdf on a provided URL on bottom..
I built one using Frederiks board it is an amazing device, I find thou I need to turn it off when tuned else I get a bit of interference. Would like to overcome that problem one day
Good job for this project hope tobe one of the lucky one to get one of this board im almost have complete since i have tmc 2208 and stepper motor already from my 3d printer 73 VA6RBC Edmonton Rommel. thanks
I made pcb layout and all factory preparation files. Also ordered PCB assembly service from two Chinese factories. It is based on Lofturs design. You can download all files on 9a3gos.com/magnetic-loop-antenna-controller-pcb-design-by-loftur-e-jonasson-tf3lj-ve2ljx/
@@isaacsanchez9673 Buy one from Loftur at the google site in the description, if he has any that is. I purchased one for $20 + shipping. If he is out and enough people email him, I'm sure he would have some more printed up. This way, your money can go to a designer of this controller board.
If you would like to receive a free board, you can see instructions on groups.io page loopController. Please send me an email with your address information so that I can check for the shipment price and prepare everything. On that group you will also find a zip archive with a KiCad projeckt, including schematics, pcb layout, gerbers,... If you guys will send me a good feedback about it, and if more people would like to have a board (a dozen are waiting in queue right now. I know, for free is cheaper), we can organize a new production batch together to keep costs down. It does not matter who will do it, as long as the price is fair for rest of us. I would like to add a design of an antenna to the project, power/swr meter and also an antenna rotator compatible with an antenna design to this board. In a video, DRV8825 is set to put out 0.8 amps. It can be lowered a lot more by turning a pot clockwise. With my motor I had good torque even at 0.3 amps. 73 de 9a3gos
Very nice and meritorious work. Another option for MLA control. Would it be possible to get one plate? I would quite like to try this design as well. Lev OK2PLL
hi i know this is a old video but does anyone supply these boards populated with the components i have attempted to build 2 of these now and they do not work for me i have everything built the enclosure the encoder the teensy but board just do not work :(
You can download my design and send it to pcbway or similar. 9a3gos.com/wp-content/uploads/2020/04/Magnetic-loop-controller-Loftur-design-pcb-9a3gos.zip I got 10 good working boards.
