TVI Stop filter

What to do, if your neighbour comes banging at your door just in that moment you want work the DX of the year
post 05 Jan 2024
TVI Stop filter

RF Filter Links


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