Flamingo+ FM - Broadcast FM Bandstop Filter v2 (FM Notch Filter) for Software Defined Radio (RTL-SDR) Applications. Blocks Problematic 88-108MHz Frequencies from Your SMA-Connected Radio

Not everyone needs this, but if you're in a metro area it might just save you. I was using a SAWBIRD NOAA and it would work sometimes, but most of the time I was swamped out by FM signals. I thought I had a frequency drift issue, but no, it was just OOB reception. Installing this filter between the antenna and the SAWBIRD amplifier really did the trick for rejecting the strong FM signals. My station works perfectly now.

I have a local FM station 2 miles away that is running high power. The signal bleeds over into the Air Band and VHF-Hi in spots. This filter removes the false signals and cleans up the bands for me. Decent price, well packaged, and arrived on time. For SDR and scanner work it is worth having one.

I use this filter to effectively remove reception interference on my RTL-SDR dongle and KiwiSDR receivers caused by strong local FM broadcast stations.

I'm in the middle of the city, with a big mountain in front of me where all the city antennas are located, so all my reception includes some sort of comercial band FM interference, but with this filter I'm able to mitigate the problem, no at 100% because I have a radio station 3 blocks away, but with the rest of the RF spectrum works very wellI really recommend connect this filter next to your SDR hardware using the connector included, I connected mine using a 20 cm cable with SMA Male to Male connectors and is more than enough to inyect FM interference again in the line, I was about to ask for a refund but it was my fault at first place

This puts a fairly deep notch in the spectrum at the broadcast FM band which may help if your SDR is having front end overload problems.

The Nooelec NESDR FM bandstop v2 is a good notch filter, but compared to the RTL-SDR FM bandstop in my area it just does not filter out some of the strong FM signals. Several strong FM stations are not filtered out in the upper 100+ MHz frequencies and this impacts the reception of aviation frequencies I am trying to listen to. Below the 100 MHz frequencies it does the same job as the RTl-SDR FM bandstop. It is still a good bandstop just get both to see which is better in your area first.

I recommend this filter

This well made FM band stop filter solved my problem when Radio Amor 100.3 FM overloaded my SDR transceiver.100.3 FM's 14.5kW of power 10 miles away was blocked by the filter. Success!The filter is labeled with input and output sides, which means that you should use it with the antenna connected to input. I tested the filter, and as you can see by the pictures, the filter is not directional and you can use it in either orientation. Since the filter is bidirectional, I use it in a QRP transciever and have transmitted 5W SSB and CW.I'm not sure I would do this with more than 10W, but for 5W it works great.I like it and recommend it.