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Converting Mono AM Transmitter to Stereo C-QUAM

While I'm sure there were purpose-built transmitters of all sorts with C-QUAM exciters built in (the low power "Part 15" ASMAX 2, for example), there must have been times where it wasn't economically feasible to replace a perfectly fine mono transmitter, yet the station still wanted to do stereo. In those instances, there are out-board stereo exciters, but how does one go about installing/configuring such a thing?

I ask because I recently set up a ChezRadio Procaster, the range of which, even without a ground, is absolutely impressive for only 100mW! My old setup was so inefficient, that even being non-compliant at 600mW (strictly for testing; it ran at the legal 100mW most of the time), there was no chance of trouble, as the signal wouldn't reach much past my house no matter what I did.

The only thing that was better about my old system is that it could broadcast in stereo (I have several AM Stereo receivers, and I thought it nice to be able to use them with a stereo signal); the Procaster is mono, of course.

So, now to the question: is there something I can do relatively that is relatively noninvasive or reversible to convert it for stereo operation? If not, what do I do?

I think it was mentioned somewhere else, but I don't recall where.

Thanks,

c
 
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