Changes

Whole House FM Transmitter 3.0

1,713 bytes added, 18:18, 20 November 2023
/* antenna */
The following lines were added (+) and removed (-):
== mods ==You need an RP-sma to BNC female adaptor to connect to coax cable or a better antenna. == improvements or modifications =====audio processing / compression===Using computer software audio processing such as [https://www.thimeo.com/stereo-tool/download/ Thimeo Stereo Tool 10.10].Using a hardware audio processing device between the audio source and the transmitter.===antenna===Use the long wire antenna for best range.  Try to run it as straight as possible, either vertically or horizontally although vertical polarization is probably best.  If you run the unit on full power you will definitely want to use the wire antenna as the short telescoping antenna does not radiate well enough to protect the transmitter from reflected power which could cause damage.The wire antenna is 133½" long (the wire part) and including the screw base would be almost 134".* 133½" = 11' 1½" ''which appears to be a 1/2 wave'' for an end fed (long wire) antenna.==Pre-emphasis==* You can access the higher power by holding both the <big>'''CYCLE button and MUTE simultaneously'''</big> while the unit is operating (has power). ===Pre-emphasis===Pre-emphasis amplifies the high-frequency components through a simple Pre-emphasis circuit.  In North America 75μs is used, and in Europe, 50μs is used.  In order to have a normal frequency response, a De-emphasis circuit should be added to the radio receiver. Just as the same as Pre-emphasis circuit, it has a time interval after receiving the radio waves, and it is the same as the one of Pre-emphasis circuit.* Try switching to EU and see if it benefits. ???[[Category:Electronics]][[Category:Radio]][[Category:Consumer Electronics]][[Category:Tangible Product]][[Category:Micro Broadcasting]]
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