Flintstones Bluetooth

I wanted to be able to record cassettes from the internet (bird calls and other public domain items only !)

Step 1: The Quest Is the Quest

I bought one of these thingies with a 3.5 mm plug from Radio Shack shortly before ours sank, but the signal was awful and I couldn't tell a thrush from a grackle on the tapes. (I would run it from the computer's earphone jack to a double cassette player/recorder and record on the second one)

Step 2: Junk to Gold

I had this MP3 player transmitter from back when I had or wanted an MP3 player. I tried it in the 3.5 mm headphone jack on my computer, and Wahlah! I had anything on my computer transmitted to my whole house on any FM device, including one including a cassette recorder! The neighbors can probably receive it too, though nobody has thanked me yet.The signal is pretty good, with less static than I put up with on my work radios. But, the two tiny AAA batteries would run down in a couple of hours.....so.....

Step 3: Dollar Store Battery Case

I took some random wire from around the house, gutted a one dollar flashlight, removing the switch and light bulb fixture, attaching some random wire to the battery contacts, twisted the other ends to the appropriate contacts of the transmitter battery case and plastered it in with gooey epoxy putty (JB Weld). Now it uses two D cells and I am still using the original pair after three weeks. I had to shorten the wires considerably (pix are the newer version) because they were picking up interference from everything. It makes tapes that are almost as good as ones taped directly from FM, and any suggestions are welcome.