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A cheap noise reducing speaker

A cheap noise reducing speaker
    Many a good qso has been wrecked by that high pitched crackling noise that is common on weak signals
post 05 Feb 2025



RF Filter Links

70



70Mc/s Low Pass Filter
The filter published there is working without problem and needs no or very little tuning

Audio Filter & Speakers
Passive audio filters have been around for many years,If your receiver didn't have a CW filter, this little jewel worked fairly well

A cheap noise reducing speaker
Many a good qso has been wrecked by that high pitched crackling noise that is common on weak signals

Band Filters
Real world signals include multiple frequencies over a wide range


Psion ham software

PSION Greyline Clock PSION Greyline Clock v. 1.0 is a UTC/Local clock showing sunlight/darkness area on the world map

Radioassistance

Radioassistance Radioassistance E Kenwood Dealer, vendita ricetrasmittenti, antenne, parti di ricambio, elettronica

SunCalc

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