2m BandPass Filter 144-146MHz Low Loss

Ultimate receiving  2m BandPass Filter 144-146MHz uses high Q coils and capacitors to achieve super low loss. Use this filter if you do not want to spoil receiving performance in DXing, contesting, or EME. More importantly with this receiving filter, you will suppress disturbing signals of any strong HF, 6m, 1.25m, or 70cm stations. Positions of the connectors allow outdoor mounting. So this 2m BPF can be put near the antenna to achieve the best possible receiving performance. The Bandpass filter is enclosed in a strong brass box.

 

2m BandPass Filter 144-146MHz Low Loss appaerance

 

Achieved results on a built 2m BandPass Filter 144-146MHz

Insertion loss:

50 MHz -68 dB
88 MHz -45 dB
108 MHz -31 dB
144MHz -0.21 dB, RL ≤ -30dB
146MHz -0.21 dB, RL ≤ -31dB
432 MHz = -75 dB

 

Measured RL (S11) and IL (S21) on a built 2m BandPass Filter 144-146MHz

 

2m BandPass Filter zoomed

 

BandPass Filter 144-146MHz zoomed to 0.3 dB per division

 

The same filter with male-female connectors is here
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