A new Airband bandpass filter centered at 128 MHz. The filter has a bandwidth of 20 MHz. The filter is designed to reject strong signals in the adjacent FM band. Here are the specifications:
| Frequency (MHz) | Typical Attenuation (dB) |
|---|---|
| 78 | 43 |
| 88 | 35 |
| 98 | 25 |
| 108 | 10 |
| 118 | 4 |
| 120 | 4 |
| 125 | 4 |
| 128 | 4 |
| 138 | 4 |
| 150 | 11 |
| 200 | 39
|
The filter is available on Tindie
GPIO LABS 
Dear ladies and gentlemen,
if I buy your AIRBAND Pre Filtered LNA w/BIAS TEE 118-140MHz Filter Gain 20dB NF
The pre-filtered LNA includes the same filter so you won’t need an additional filter.
Thank you very much for your fast answer. One last question: Does the Airband Pre Filtered LNA w/BIAS TEE work with the RTL-SDR V3, which has an 4.5V bias tee? Or do you need a higher current?
Many thanks in advance,
Chris
The rtl-sdr v3 can source 180 mA of current which is adequate for this LNA