Total posts : 45366
Those units you have listed are a good start. If you want a plug and play unit, go with the C-Crane. They have really good audio quality and are FCC Part 15 certified.
The Ramsey FM 10C would be my first choice…for a couple of reasons. One..the unit is a kit and gives a perfect opportunity to become familiar with the innards of your transmitter as you assemble it. I own a Ramsey FM-100, which was in kit form when purchased back in 1997, and that unit is still operating perfectly today. I am convinced that the reliability factor in Ramsey products is top notch.
They may not have an FCC certification sticker, but when built properly they will operate within the parameters and spirit of Part 15…that is if they are not beefed up and modified with sloped wings and after-burner! I say that because there is a site out there showing a Ramsey AM-25 who’s owner decided to “beef” it up by replacing certain parts with way overblown and over-rated parts…so overblown to the point that unit has to have a hefty fan on it because it now runs even hotter than the stock unit!
The Whole House FM unit…not sure on that one as I never owned one or tested one. But as it is a pre-built unit and FCC Part 15 certified, that is a good reason to consider it if you do not want to assemble a kit.
If your into electronics and kit building or building from scratch or from other designs, take a look at the forum’s resource library for a variety of FM transmitter designs. Any one of them can be built for far less than the cost of any of the units you have listed.
Happy hunting and good luck!