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rfi - What does it mean to have "RF in your signal ...
https://ham.stackexchange.com/questions/7764/what-does-it-mean-to-have-rf-in-your-signal#:~:text=It%20most%20likely%20means%20that%20unwanted%20RF%20from,using%20ferrite%20and%2For%20capacitors%20on%20the%20audio%20line.
RF in Audio Help - QRZ Forums
https://forums.qrz.com/index.php?threads/rf-in-audio-help.236002/
Yes, the RFC is an RF choke. Gold Star Vertical antenna can and do collect a static charge -- just like a lightning rod or tower. The RFC is used for static discharge off the vertical element. IF you have ever seen a large commercial broadcast tower you will see either a spark gap or choke used for the same purpose!
rfi - What does it mean to have "RF in your signal ...
https://ham.stackexchange.com/questions/7764/what-does-it-mean-to-have-rf-in-your-signal
3 Answers Active Oldest Votes 2 It most likely means that unwanted RF from your antenna system is getting into your transceiver's audio input (microphone), distorting your audio. Some solutions are reducing any common-mode RF on your feedline, moving the radio and antenna further apart, or using ferrite and/or capacitors on the audio line.
https://groups.io/g/TS-590/topic/rf_in_audio/81029661?20,0,0,0::recentpostdate%2Fsticky,,,20,2,0,81029661
Subject: Re: [TS-590] RF in audio Check L19 on the control unit board. This is an RF to ground block in the mic circuit. These little inductors sometimes blow open. A similar one causes complete loss of keying on CW (provides the only ground return for keying socket area, both straight key and keyer input).
Re: RF in audio - groups.io
https://groups.io/g/TS-590/message/38101
- I'm not sure that RF in the audio is the right description. Maybe more like a PLL becoming unlocked. - L19 on the control board is not open. - Changing microphone makes no difference. - Removing the VGS-1 makes no difference. - And, naturally, a …
What is radio frequency (RF, rf)? - Definition from …
https://techtarget.com/searchnetworking/definition/radio-frequency
Radio frequency (RF) is a measurement representing the oscillation rate of electromagnetic radiation spectrum, or electromagnetic radio waves, from frequencies ranging …
RFI In Audio Systems
http://www.audiosystemsgroup.com/AES-RFI-SF08.pdf
Typical Audio Noise Spectrum on “Ground” Measured between two outlets in my office -34.3 dBu (16 mV) 11 RF Spectrum Analyzer 0 – 1 MHz Measured between two different outlets in my office, one a conventional outlet, and one an IG outlet, into a 75 ohm load 0 Hz 1 MHz Line Filters Can Add Noise to Ground 12 Other Noise on “Ground”
Ham Station Desk Radio Equipment Ground
https://www.w8ji.com/rfi_rf_grounding.htm
What sounds like RF feedback usually is RFI, but other things can sound very similar. We should never assume distorted or bad audio, or other anomalies during transmission, are always RF feedback or RF generated problems. An "RFI" problem might be direct current ground loops in station audio wiring, or in control wiring.
RF Basics, RF for Non-RF Engineers - Texas Instruments
https://www.ti.com/lit/ml/slap127/slap127.pdf
RF_P TXRX_SWITCH RF_N CC2420 BALUN TX/RX Switch ANT PA LP filter TX path RX path Control logic and bias network RX current 19.7 mA 19.7 mA Line of 230 meter 580 meter Sight Range Sensitivity -94 dBm -93.1 dBm Output 0 dBm 9.5 dBm power TX current 17.4 mA 30.8 mA CC2420EM w/PA CC2420EM
RF Basics - Professional Wireless Systems
https://www.professionalwireless.com/rf-basics-page/
Regardless of how they look, all audio RF systems take in an audio signal, attach it to an RF carrier wave at the transmitter, transmit the signal to the receiver where the RF carrier wave is detached from the audio allowing the audio to be sent to the audio output and into the audio system.
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