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3.5mm input jack RF bypassing and filtering | diyAudio
https://www.diyaudio.com/community/threads/3-5mm-input-jack-rf-bypassing-and-filtering.302678/
3.5mm input jack RF bypassing and filtering. Hi, if you've ever taken apart a commercial amplifier designed for use with 3.5mm jacks from a computer or phone then you'll have noticed that most of them include a combination of capacitors and resistors right at the input jack. The values are usually a few 100 pF and a few kohm at most.
Getting to Know the Bypass Capacitor - RF Cafe
http://www.rfcafe.com/references/popular-electronics/bypass-capacitor-jan-1962-popular-electronics.htm
Audio-Frequency Amplifiers. In a typical audio-frequency amplifier, such as that shown in Fig. 1, a capacitor, C1, is used to bypass audio frequencies around the cathode resistor, R1. If capacitor C1 is omitted or if it does not operate properly, the a.c. plate current component develops a voltage drop across R1 which opposes the input signal applied to the grid.
3.5mm input jack RF bypassing and filtering | Page 2 ...
https://www.diyaudio.com/community/threads/3-5mm-input-jack-rf-bypassing-and-filtering.302678/page-2
I used the word "attenuation" in 927 posts. I used the words "low pass" in over 900 posts. One of the recent was just 7days ago and is the same topic as today. Let me guess.... you live in an area with lots of high power transmitters ?!
RF Hacking: How-To Bypass Rolling Codes | Hackaday
https://hackaday.com/2016/03/06/rf-hacking-how-to-bypass-rolling-codes/
RF Hacking: How-To Bypass Rolling Codes. The RF signal transmitted from a modern key fob and received by the associated vehicle is only used once. If the vehicle sees the same code again it ...
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).
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