Total posts : 45366
With an AM transmitter you want to have your antenna out in the open (building materials tend to absorb the signal) and as high as possible. You will be using a wire antenna, so you will want to get it up as high as possible, and preferably out a window or on a balcony.
Unfortunately, it’s that one restriction that will most limit your range, and it’s probably almost immaterial which transmitter you choose. The SSTran and the Talking House are both good transmitters; the Spitfire is as well, and you can purchase it assembled from the U.K. for around the same price as the SSTran (maybe even a bit cheaper).
If it’s at all possible, it would be preferable to use either a Rangemaster or a Procaster and deal with the rigid 8 foot antenna in some manner – I can’t tell from your post whether it’s impossible to mount something outside or just preferable not to do so. Both the Rangemaster and the Procaster use antennas mounted to the transmitter box, so if you can find a way to mount that box to the side of your house (or balcony), they will perform much better than anything with a wire antenna.
The SSTran to get decent range needs an external, base loaded antenna. Same with the Talking House. If you have a spare $300 lying around, you can also want to consider getting the external ATU for the Talking House, to which you attach an 8 foot whip – you keep the Talking House transmitter unit in your house, and run coax to the ATU which can be mounted on a balcony rail or the side of your house.
Hope that’s clearer than mud.