![](http://www.g4ilo.com/uploaded_images/tinycub-740173.jpg)
When the speaker arrived, it was smaller than I imagined from the seller's picture, as you can see. It has a built-in audio amplifier and a lithium rechargeable battery, which must be recharged from a computer USB port. This is a bit of an inconvenience, and I wondered whether I could rig a power source from within the MFJ Cub so it could be powered (or charged) from the Cub's 12V supply, but I'll leave that for now.
The problem I didn't anticipate was that the jack for plugging into the Cub (or MP3 player) is captive, and folds out of the speaker. This made it impossible to plug it into the Cub at all. However, I cut the jack and a short length of cable off an unused pair of ear buds and was able to solder this to the jack (which fortunately is gold plated and very easy to solder to). I was then able to retract the jack back into its slot with the wire attached, and stick a piece of black insulating tape over the slot. The result: a tiny speaker with an attached lead that I can plug into the MFJ Cub or any other of my small QRP rigs that don't have a speaker output.
I think it looks rather cool.
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