Receiving 2m BandPass Filter Low Loss

Ultimate receiving  2m BandPass Filter Low Loss 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 are selected so that the filter can be directly connected to the coaxial relay to avoid any additional coaxial cable loss and to achieve the best possible receiving performance. The Bandpass filter is enclosed in a strong brass box.

 

Low Loss 2m BandPass Filter appearance

 

Achieved results on a built 2m BandPass Filter Low Loss 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 Low Loss

 

2m BandPass Filter zoomed

 

2m BandPass Filter Low Loss zoomed to 0.3 dB per division

The same filter with two female connectors is here
All 2 Meter filters
All HF VHF and UHF Filters