I installed an adapter kit for these folks over the summer to get their built in opener in their car to work with the one in their garage, it was a tranciever that plugged into the wall outlet, I assume it was two circuits, one for communicating with the opener and one for the car. I suppose you could get something like that and just pair your current opener to it
On Tue, Oct 28, 2014 at 10:14 AM, Chuck McCown via Af <af@afmug.com> wrote: > Many of these devices are in the 315 or 390 MHz range. I think 315 is > more common. > > In free space, the quarter wavelength dimension of 315 MHz is about 18.75 > inches. > > Measure the wire coming out of the device. That will give you a hint. It > is probably a quarter wavelength long. If so, then you can extend it with > some coax. Make sure the braid of the coax is soldered to the ground plane > of the circuit board. Remove the wire and attach the center conductor > where the wire was soldered. > > Get 50 ohm coax with a good copper braid. RG-58 would be a good choice. > Not a sparse braid with foil. You want the old stuff folks used to use for > CB radios. > > Outside the garage, you strip the outer sheath of the coax but not the > braid. Push/slide the braid back. It opens up like a chinese finger pull > toy. Then roll it back over the sheath not stripped. > > That will leave a length of insulated center conductor. The length of the > insulated center conductor and the length of the braid rolled back over the > sheath should both be a quarter wavelength or a bit shorter. That makes a > cheap and dirty sleeve type dipole. Just make sure that it is oriented so > that you are looking at the broad side of it when approaching the garage. > > - or - Simply extending the wire will work provided you hit the magic > length. I don’t have a clue as to what that length is because it will > depend on the impedance of the receiver, the local RF/ground conditions on > the route out of the garage and outside the garage as well. I am sure you > can find a length that will work but it will take some experimentation. > > > On Oct 28, 2014 7:18 AM, "Nate Burke via Af" <af@afmug.com> wrote: > >> I have a double steel garage door with Alumnium siding on the house. The >> Remote's have always been finicky since the opener/door was installed, but >> now I changed the lights in the Opener to LED Bulbs, and it's worse. I >> have to be right under the opener to use the remote when the bulbs are lit >> (when they're off, it seems to work the same as it always has). Seems that >> I may need to move/increase gain on the antenna. Some things I found >> online talk about running a RG59 cable to the outside, but then just >> soldering the original antenna wire on the end of it and just letting it >> hang outside. Seems that there should be a better way. Any suggestions? >> >> Nate >> >> -- All parts should go together without forcing. You must remember that the parts you are reassembling were disassembled by you. Therefore, if you can't get them together again, there must be a reason. By all means, do not use a hammer. -- IBM maintenance manual, 1925
