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Hello, and WELCOME to part 15 us.
Of the three transmitters you mentioned I would recommend you start with the TalkingHouse since it is pretty much a “turn key” unit. Search this site (use the search function at the upper left) for information on this transmitter and the others. There are different versions of the TH and you will want to get one which gives good audio quality and if you can get one with an Antenna Tuning Unit (ATU) it will simplify the antenna installation in a legal manner.
If you are willing and able to spend time learning the hardware, theory, and practice of radio transmitter/antenna technology then the Ramsey and SSTRAN are good choices. The SSTRAN has a built in audio compressor which would help if the broadcast crew are not technical types.
You mentioned elevating the antenna 15 feet. If possible, a ground mounted antenna with radials would be preferrable as this will avoid legal ambiguity regarding ground length.
Don’t rush into this without doing some homework on the subject first. What you propose is doable but to do it right requires some research. It is easy to set up a station for limited range such as within a building but to reach out a quarter mile or so usually requires attention to the antenna system.
There are various ways to set up a “studio” with probably the simplest being to use a computer as the central component but there are also good hardware devices which can serve this purpose. Since I use a computer I will leave it to others here to suggest hardware for the “audio chain”.
Best wishes in achieving your goal with this and check back here for more comments.