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Do you mean, what am I trying to do?

No, I was confused, because you had only one good idea, and 2 (of the three) bad ideas, so I was just asking, what are you proposing ?
But you made it well, by rectifying yourself.

No, I was confused, because you had only one good idea, and 2 (of the three) bad ideas, so I was just asking, what are you proposing ?
But you made it well, by rectifying yourself.

Im still thinking of other ways to do it. Im open to any suggestions.

I thought you had L+R and L-R to get your stereo signals.

L+R + L-R = 2L (just your left signal)
L+R - (L-R) = 2R (just your right signal)

It would be fairly easy to add and subtract these signals by using some sort of opamp.

So what would be the use of having two L+R signals? You wouldn't be able to extract the stereo signal at all.

- Nick

I thought you had L+R and L-R to get your stereo signals.

You do. AM just has a L + R.

So what would be the use of having two L+R signals? You wouldn't be able to extract the stereo signal at all.

Good point. I knew it probably wouldnt work. So I need the L - R.

I noticed that there's a 25Khz signal sideband on each side of the fm station signal to prevent other stations from interfering. The problem with this: as the signal goes father from the radio station, the signal gets weaker. So this blocking sideband loses its effect and causes a stronger radio station near by to interfere.

I cant extend this sideband, because a radio station is only allowed 200Khz of bandwidth for each channel. 50khz for the two blocking sidebands, 150khz for the actual channel. I wonder if I can somehow filter out the noise instead of originally trying to add an extra signal or trying to change the polarity of one of the sidebands.