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L C Audio Technology / Mains Filter
https://www.lcaudio.com/index.php?page=314
L C Audio Technology / Mains Filter Mains Noise Filter 10 Amp. / 2300VA Product Price in EUR excl VAT Ordering Stock Mains Filter 230V 10 Amp. max. 2300 VA w/case EUR 64.32 Order Now In Stock Taking DIY to the next level! The purpose …
L C Audio Technology / Accessories
https://www.lcaudio.com/index.php?page=312
Mains Noise Filter for removing RF noise generated by industrial machines, household appliances etc. The filter prevents those from being carried to the audio equipment through mains supply. Digital SoftStart for gentle start-up of large transformers and charging of large capacitor banks. DC filter. This filter will block DC-voltages on the mains and thus remove or limit transformer …
Simple AC mains line filters (DIY, Schaffner ...) and some ...
https://www.audiosciencereview.com/forum/index.php?threads/simple-ac-mains-line-filters-diy-schaffner-and-some-measurements.26172/
and it is the LC filter, L = 9mH, C = 235 nF Here is the measured frequency response. Generator output impedance is close to 0 ohm, load impedance is 3 kohm. Noise and distortion of SS preamp and tube preamp were measured with and without the filter, similar as done by @amirm . No differences were found with the SS preamplifier.
Using LC filter instead of RC filter in mains powered circuits
https://electronics.stackexchange.com/questions/234695/using-lc-filter-instead-of-rc-filter-in-mains-powered-circuits
For low power (a few watts to 10s of watts) dimmers, the main reason to filter is to reduce the high frequencies so as not to interfere with radio communications. These are many multiples of the 50 or 60 Hz fundamental frequency. A L-C filter will attenuate the higher frequency harmonics relatively more than the lower frequency ones.
A Passive LC Audio Filter For Amateur Radio Use
http://www.genebitsystems.com/david/AudioFilter/A_Passive_LC_Audio_Filter.pdf
Passive LC filters can be quite effective in improving the audio from a receiver. Residual power supply hum can be virtually eliminated and background hiss originating from wideband high-gain amplifier stages is often greatly reduced.
Mains Filters - part 1 - Simple passive filters - Audio Misc
http://www.audiomisc.co.uk/mains/filters1.html
Mains Filters for Domestic Audio. Ideally, the mains voltage provide by your wall sockets would (in the UK) be a clean 50Hz sinusoid with an rms size of around 240 Volts. Alas, in practice the voltage will vary, and can be accompanied by interference. This may produce unwanted effects like audible bangs or rasping noises from sources like ...
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