2m 144-146MHz 200W Transmit-Receive Narrow Band Pass Filter Low Loss

This 2m 144-146MHz 200W Transmit-Receive Narrow Band Pass Filter is intended for cleaning output signals of any transmitter with power up to 200W. It can also be used as a filter in front of any broadband preamplifier to protect from any out-of-band signals. A bandpass filter uses high-Q coils as well as high-Q capacitors. Low loss of the filter is achieved with careful design and adjustment.

This filter is equally good as a transmitting and receiving low-loss filter.

The filter will reduce the TVI problem or your problem with neighbors with strong HF, 6 m, or 70 cm transmitters.

 

2m 144-146MHz 200W Transmit-Receive Narrow Band Pass Filter appearance:

2m 144-146MHz 200W Transmit-Receive Narrow Band Pass Filter measured results:

Insertion loss:
1.8 MHz 106dB
3.8 MHz 110dB
7.1 MHz 110dB
14.1MHz 105dB
21.2MHz 101dB
28.4MHz 94dB
50 MHz 76dB
52 MHz 75dB
54 MHz 73dB
70 MHz 64dB
70.5 MHz 64dB
88 MHz 53dB
98 MHz 46dB
108 MHz 39dB
144 – 146 MHz 0.25dB
288 MHz 60dB
432.1 MHz 36dB
440 MHz 44dB

Maximum power input at SWR:
1:1 = 200 W; 1:1.5 = 140 W; 1:2 = 90 W; 1:3 = 70 W (Intermittence 50%)

 

2m 144-146MHz 200W Transmit-Receive Narrow Band Pass Filter Measured Return Loss (S11) and Insertion Loss (S21).

 

144-146MHz 200W Transmit-Receive Narrow Band Pass Filter HF Suppression

 

2m 144-146MHz 200W Transmit-Receive Narrow Band Pass Filter Suppression on 10m and 6m

 

2m 200W Transmit-Receive Narrow Band Pass Filter suppression 4m band and FM:

 

2m 144-146MHz 200W Transmit-Receive Narrow Band Pass Filter 288MHz and 70cm attenuation:

 

2m 144-146MHz 200W Band Pass Filter 200W could be ordered with outdoor housing
Add 10 EUR for the plastic box “DB“ and bracket