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I direct inject it at the mic jack when I am doing my asymmetrical modulation mod on a radio, so I can fine tune the mod itself, and it also allows me to adjust the 54mhz trap coil to minimize harmonics. IMD is never really an issue because from an RF standpoint, I am operating all of my RF stages within the limits of their transistor specs.

Last radio I did my mod on, the worst reading I got for harmonics was -52dB down. That was on the 1st order. Everything else was below -52dB. That's checking 1st thru 4th order harmonics on the spectrum analyzer, and sweeping the tone frequency from 500hz to 4khz.

~Cheers~

[QUOTE="ExitThirteen, post: 576134, member: 6878"] I direct inject it at the mic jack when I am doing my asymmetrical modulation mod on a radio, so I can fine tune the mod itself, and it also allows me to adjust the 54mhz trap coil to minimize harmonics. IMD is never really an issue because from an RF standpoint, I am operating all of my RF stages within the limits of their transistor specs. Last radio I did my mod on, the worst reading I got for harmonics was -52dB down. That was on the 1st order. Everything else was below -52dB. That's checking 1st thru 4th order harmonics on the spectrum analyzer, and sweeping the tone frequency from 500hz to 4khz. ~Cheers~ [/QUOTE]

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