I'm not looking to run a broadcast station, just tinker with some receivers on the test-bench, so all I need is a few milliwatts. I could get something multi-watt and just attenuate, but that seems silly. What's the cheapest/cleanest/most versatile way to get my soundcard output modulated up into 88-108MHz? (And yes, I know those 3 goals are gonna conflict, give as many different answers as you feel like!
I'm not afraid of solder. Actually tend to relish circuit-building. But I'm not much of a radio engineer, so I don't want to build a modulator totally from scratch. All the cheap-and-cheerful FM-TX-on-a-single-chip solutions seem to have Left and Right inputs, and they generate the stereo magic internally. Is there one that'll accept MPX and hand me RF, that I've somehow missed in my searching?
Alternately, there are some cute little transmitters in the 5-watt range on eBay, some of which seem to have a stereo/mono switch. If I put one of those in mono, and feed it Stereo Tool's output, is it likely to do something useful?
Thanks in advance! New here and already blown away by the amount of knowledge in this community.