Increase effective distance on 'ebay' flash remote trigger transmitter with antenna

Step 3 Make a hole for the antenna

To make a hole, you could use anything. I chose a soldering iron for melting the plastic, in opposition to a drill bit. I was concerned that a drill bit might stress the plastic and break it, where the heat method would smoothly open the hole with low stress.

Use your hot soldering iron tip to carefully make a small hole in the top piece. I selected the middle of the top, reasonably near to the front of the unit near where the antenna wire is soldered (at least when the top is back in place) simply for aesthetic reasons - you could make the hole anywhere on the top or the nearest side. In fact, it is possible that a reasonable performance could be had by leaving the antenna inside the case, by looping the wire around the interior and not making a hole at all - but, I chose to make a better antenna by routing the antenna wire outside the case, and orienting it vertically for a better horizontal radiation pattern

Start the process by locating the approximate middle point of the case, left to right. Use the hot tip on the inside of the case piece, slowly working into the plastic in stages. This allows the plastic to flow outward and minimize stress on the case piece, and also allow you to gauge the progression of the tip, from the outside. Keep pressing forward, and make sure that the hole never gets much larger than the copper wire thickness.

The second photo shows where the wire will come out - just in front of the button and transmit indicator LED.

I recommend that you stop when you can see a small hole formed, then turn to the use of a small knife tip. Use the knife edge to very lightly scrape away a bit of plastic until the wire (with insulation) can fit through the hole, but snuggly. This also allows the hole to be smoothed and to look better trimmed.