For part 15, LPAM or just for kicks I got this idea and wondered if it would work as I imagine it would?
Take a mono output from studio console and run it into each channel of a stereo audio equalizer.
Run the left EQ slope from lows/highs 0db to -10, or a simple downward slope. Run the right the opposite as in lows/highs from -10 to 0db.
This way the left channel contains the bass frequencies of audio on a straight downward slope, the right contains the opposite - the treble highs on an upward slope.
Then take the EQ stereo outputs and compress them using a simple stereo limiter driven hard (or proper stereo compressor).
Take the output of that and combine the left/right back to mono and run it to the transmitter.
This way it acts as a two band audio compressor. Both L+R works on mids, L works on lows, and R works on highs.
Left metering would be bass compression, right metering would be treble compressions.
Would this do as a basic multiband compressor?
I ask because buying a professional multiband audio compressor cost way more than I care to ever spend on such.
However running such low RF power requires one to get the most out of their AM modulation to attain furthest reception within regulations and a basic one band mono compressor has the issue with loud low frequencies compressing the softer highs and visa-verse.
Also EQs are cheap, can be found at garage sales often for dollars, and some of them even have built in audio limiters that when driven hard can act as compressors so a single unit can work as a two band compressor alone. Double it and it could be used for FM broadcasting, or a 4 band AM compression setup.
Has anyone ever tried this when running a penny pinching setup for fun?
Will it work as I suspect it would?
Take a mono output from studio console and run it into each channel of a stereo audio equalizer.
Run the left EQ slope from lows/highs 0db to -10, or a simple downward slope. Run the right the opposite as in lows/highs from -10 to 0db.
This way the left channel contains the bass frequencies of audio on a straight downward slope, the right contains the opposite - the treble highs on an upward slope.
Then take the EQ stereo outputs and compress them using a simple stereo limiter driven hard (or proper stereo compressor).
Take the output of that and combine the left/right back to mono and run it to the transmitter.
This way it acts as a two band audio compressor. Both L+R works on mids, L works on lows, and R works on highs.
Left metering would be bass compression, right metering would be treble compressions.
Would this do as a basic multiband compressor?
I ask because buying a professional multiband audio compressor cost way more than I care to ever spend on such.
However running such low RF power requires one to get the most out of their AM modulation to attain furthest reception within regulations and a basic one band mono compressor has the issue with loud low frequencies compressing the softer highs and visa-verse.
Also EQs are cheap, can be found at garage sales often for dollars, and some of them even have built in audio limiters that when driven hard can act as compressors so a single unit can work as a two band compressor alone. Double it and it could be used for FM broadcasting, or a 4 band AM compression setup.
Has anyone ever tried this when running a penny pinching setup for fun?
Will it work as I suspect it would?