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Audio Noise Reduction Filter - Welcome to ECSE
https://www.ecse.rpi.edu/courses/CStudio/ham_radio_docs/DSP599zxfm.pdf
Used to turn on random noise reduction. Press [Shift+Random] to activate variable noise reduction. 10. AGC switch AGC on. 11. Shift switch This blue switch shifts the function of the next switch pressed to its function labeled in blue. 12. Function switch This switch is used to enter into menus and other specialized functions. 13. High Pass/Center Freq Control
Speaker Noise Reduction Circuit Add on VE3VDC - HAM …
http://hamuniverse.com/speakernoisecircuit.html
Most of the really annoying noise is in the range of 2500 to 10,000 hz. Since these two ranges don't overlap very much we can effectively reduce the audible noise on a signal using a low pass filter to remove the portion of the audio spectrum above 3,000hz. This effectively takes off the noise and leaves the voice alone.
eHam.net
https://www.eham.net/reviews/view-product?id=209
This DSP audio noise reduction filter works well and clarifies signals mixed with random atmospheric and electrical noise. The high cut and low cut filters limit and shape audio bandwidth, effectively reducing low frequency buzz, howl and hummmm; minimizing high frequency hisssssss; and minimizing vocal sibilance.
Transceiver RFI Kit - 5 Noise Reduction Filters
https://qrznow.com/transceiver-rfi-kit-5-noise-reduction-filters/
WORKS WITH MANY BRANDS OF HAM/COMMERCIAL HF RADIOS INCLUDING ICOM 7300. This kit will help reduce or eliminate: 1. Radio Frequency Interference (RFI) to electronic devices including audio/video systems, computers, telephones, garage door openers, alarm systems, and home appliances, in your house or your neighbor’s house. 2.
eHam.net
https://www.eham.net/classifieds/593498
The Timewave DSP-9 is an audio noise filter (Version 3.0 Firmware) for amateur radio voice, data and CW operation. It uses DSP algorithms to perform noise reduction, notch filtering and bandpass filtering. The rear panel has jacks for audio input, line output and speaker output. Requires 12 VDC at 1 amp.
DSP : DSP software for ham radio operators - The DXZone.com
https://www.dxzone.com/catalog/Software/DSP/
HamView - A freeware program to dig out weak signals buried in noise, functionally similar to the excellent FFTDSP of AF9Y, but with the added bonus of real time audio filtering of the incoming signals. Just point and click with the mouse, and the selected signal will …
Grounding and Receiver Noise | KV5R.COM
http://kv5r.com/ham-radio/grounding-and-receiver-noise/
Amateur Radio Frequency Allocations and Band Plans ... When i am on 21mhz and turn off noise blanker i have no issues in both signal increase or audio noise increase. ... Would like suggestions as to reduce this noise My radio is an ftdx 3000 It is set according to yeasu specs for best noise reduction but still s7 to s9 I do live in a ...
Transceivers with best Noise Reduction ? | QRZ Forums
https://forums.qrz.com/index.php?threads/transceivers-with-best-noise-reduction.748364/
IMHO that in the modern band environment ability of noise reduction is become more important then dynamic range of the ham radio transceivers. Recently I watched an Yaesu FTDX-101 video on YouTube with DNR demonstration, that was very impressive , or it was just a "right'" noise at the right time moment ?
hf - Can I reduce RFI/noise at the antenna? - Amateur ...
https://ham.stackexchange.com/questions/606/can-i-reduce-rfi-noise-at-the-antenna
To lower the incoming noise on a dipole antenna, connect a ground wire to the coax fitting at the antenna base. Run it to a ground rod and enjoy hearing stations that were covered up before. This does not drop incoming signals it just gives noise that comes in the shack on the shielding portion of the coax a direct path to ground.
SDR# now with IF Stage Noise Reduction Algorithm
https://www.rtl-sdr.com/sdr-now-stage-noise-reduction-algorithm/
Previously digital noise reduction could be done at the audio output stage, but now it can be done to the IF signal as well. Performing digital noise reduction on the IF stage appears to work much better than at the audio stage. Update SDR# by running the install.bat file again. Here are some comparison audio files tested on a noisy NFM voice signal for listening. Original …
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