xtgabyDec 1, 20202 minAnalysis of a Kenwood TS 440 filter unit.How does it work? Depending on the selected frequency, one of the six available filters is activated. This is done by controlling a relay...
xtgabyNov 29, 20201 minBandpassfilter for 80 meter band (3.5 MHz) with Amidon T50-2 cores.5,5 µH coil versus 55 µH coil. Picture: Schematic: 34 turns = 5.5 µH capacitor is approx. 320 pF. 104 turns = 55 µH capacitor is approx....
xtgabyNov 22, 20201 minBandpassfilter for 40 meter band (7MHz) with Amidon T50-2 cores.Important: only for receivers. This filter can not handle transmitted power. Picture: The Kank 3334 transformer from Toko has on one...
xtgabyNov 19, 20201 minBandpassfilter for 40 meter band (7MHz) with Toko Kank 3334 transformers.Important: only for receivers. This filter can not handle transmitted power. Band pass filters are used to effectively suppress strong...