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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

4.6 4.6 out of 5 stars 301 ratings
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Purchase options and add-ons

Compatible Devices SDR Receivers with SMA Connectors
Connector Type SMA
Brand NooElec
Connectivity Technology SMA
Color Gold, Black

About this item

  • Flamingo+ FM (Flamingo FM v2) is a high attenuation bandstop filter designed to stop very strong broadcast FM transmissions from causing overload and other issues with your radio or SDR
  • The attenuation level of this filter is much higher than Flamingo FM v1 (>60dB typical avg. & >70dB typical max attenuation). We recommend this filter for urban environments and other locations with high-wattage FM transmitters nearby. For other locations, Flamingo FM v1 is a better option
  • Flamingo+ FM has a higher attenuation than other similar commercial filters, while also have a lower insertion losses outside of the stop band (<0.25dB avg.) and less of an effect on the adjacent VHF airband of 108MHz-137MHz (8dB avg. attenuation vs 16dB avg. of similar filters)
  • Designed and manufactured by Nooelec in North America, with a full 2-year product warranty
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Flamingo+ FM - Broadcast FM Bandstop Filter v2 (FM Notch Filter) for Software Defined Radio (RTL-SDR) Applications. Blocks Pr
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Nooelec Lana - Ultra Low-Noise Amplifier (LNA) Module for RF & Software Defined Radio (SDR) with Enclosure & Accessories. Wideband 20MHz-4000MHz Frequency Capability with Bias Tee & USB Power Options
Nooelec Lana - Ultra Low-Noise Amplifier (LNA) Module for RF & Software Defined Radio (SDR) with Enclosure & Accessories. Wideband 20MHz-4000MHz Frequency Capability with Bias Tee & USB Power Options
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Price$21.95$21.95$31.95$33.95$43.95$34.95
Delivery
Get it as soon as Thursday, Aug 22
Get it as soon as Thursday, Aug 22
Get it as soon as Thursday, Aug 22
Get it as soon as Thursday, Aug 22
Get it as soon as Thursday, Aug 22
Get it as soon as Thursday, Aug 22
Customer Ratings
4.64.6 out of 5 stars301
4.84.8 out of 5 stars16
4.54.5 out of 5 stars297
4.64.6 out of 5 stars2,852
4.54.5 out of 5 stars6,164
4.44.4 out of 5 stars564
Value for money
—
—
4.6
4.3
4.2
—
Easy to install
—
—
4.1
4.1
3.9
—
Stability
—
—
4.1
4.3
4.0
—
Sold By
Nooelec
Nooelec
RTL-SDR Blog
RTL-SDR Blog
RTL-SDR Blog
Nooelec
connector type
SMA
—
—
—
SMA F
USB
antenna description
Radio
Radio
Radio
Radio
Satellite
Radio
connectivity tech
—
Radio Frequency
Radio Frequency
—
—
USB, Radio Frequency
tuner technology
FM
AM
—
—
Satellite Radio
—
platform
fly
windows
windows, android, linux
windows, android, linux
windows, android, linux
windows, linux
video output format
mpeg 4
—
mpeg 4
mpeg 4
mpeg 4
mpeg 4
remote included
✗
✗
✗
✗
✗
✗

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Product Warranty: For warranty information about this product, please click here

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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

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Customer reviews

4.6 out of 5 stars
301 global ratings

Customers say

Customers like the FM broadcast band stop filter for its excellent performance and build quality. They say that it eliminates every FM transmitter and works well for suppressing FM station interference. They also say that the filter works well and is much better for most applications that need an FM notch.

AI-generated from the text of customer reviews

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Fm signal strengthPerformanceBuild quality
16 customers mention "Fm signal strength"14 positive2 negative

Customers like the fm signal strength of the filter. They say it gives good blocking, and eliminates every FM transmitter. They also say it attenuates the FM Broadcast band very well, and performs better at lower FM frequencies. Overall, most are satisfied with the quality and performance of this FM filter.

"...But this filter completely filters them out. Now my scanners pick many more weak signals and Air works perfectly...." Read more

"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..." Read more

"Tested with a Spectrum Analyzer/Tracking Generator. Very good FM band rejection." Read more

"...It works perfectly! FM is gone, Orange airport is still there. Life is good." Read more

12 customers mention "Performance"9 positive3 negative

Customers like the performance of the tuner. They say it works well, and is a better filter for most applications that need an FM notch.

"The "Flamingo FM Filter version 2" works very well for suppressing FM station interference with TV reception...." Read more

"...Now my scanners pick many more weak signals and Air works perfectly. I highly recommend this filter and it has good build quality too." Read more

"This is a much better filter for most applications that need an FM notch than the original model...." Read more

"...It works perfectly! FM is gone, Orange airport is still there. Life is good." Read more

5 customers mention "Build quality"5 positive0 negative

Customers are satisfied with the build quality of the filter. They mention that it has good build quality.

"...I highly recommend this filter and it has good build quality too." Read more

"...I was amazed at the quality when testing it, and am very happy with my purchase." Read more

"...two, it works great compared to the other ones, and appears to be heavy duty" Read more

"Construction quality appears good, gives good FM blocking which allow me to monitor the Civilian Airbands without FM station harmonic interference." Read more

Worked even better than expected
5 out of 5 stars
Worked even better than expected
I've got two Nooelec SDR dongles that I use for ADS-B and UAT. I was looking for an LNA, and I ordered both this and the Lana LNA. I received this a few days before the LNA however, and decided "why not plug it in now."I am not super sure how the local FM stations can be causing so much interference to my SDRs when receiving ADS-B (1090mhz), but after plugging this in, I am seeing 3-5 times the positions reported when compared with just the SDRs.I installed the filter at 3PM on 2/12. Since then, I had over double the positions reported on the 12th, and around four times of my "normal" 20k positions today on the 13th (see the attached picture). I also noticed my peak message rate, prior to sending it to FR24/FA went from ~40msgs/sec at peak, to over 200!
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Top reviews from the United States

Rod
5.0 out of 5 stars Great filter
Reviewed in the United States on October 22, 2023
Verified Purchase
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 well

I 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
2 people found this helpful
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wizardgmb
5.0 out of 5 stars Also works very well for off air TV reception
Reviewed in the United States on September 2, 2022
Verified Purchase
The "Flamingo FM Filter version 2" works very well for suppressing FM station interference with TV reception. It does a better job than the only readily available 75 ohm FM filter from Channel Master. Flamingo provides >70 dB supression across the entire FM band, 15-20 dB more suppression above 91 Mhz and as much as 35 dB 88-91 Mhz. Adapters are required to connect 75 ohm coax using F connectors to the Flamingo 50 ohm SMA connectors but they can be found on Amazon (search for "ASIN B00CVTRTUC"). Theoretically, the mismatch between the 75 ohm TV cable/hardware and the 50 ohm Flamingo should impact desired signal levels but in practice the loss is negligible. I am bedeviled by a 47 KW 90.1 Mhz FM station 2 miles from my home and the extra 20+ dB of attenuation provided by the Flamingo is enough for me to receive my problem Vhf station 38 miles away.
6 people found this helpful
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Sal
5.0 out of 5 stars Quality build and works well
Reviewed in the United States on August 14, 2020
Verified Purchase
I have a Uniden SDS 100 and 200 with a Discone antenna 30 feet above my house. I do not live in a city but I am near one. Receiver desensitivity is a insidious issue as you cannot tell it is happening. I have some other notch filters and FM broadcast will still blast thru (I’m looking at you Jim M75!) But this filter completely filters them out. Now my scanners pick many more weak signals and Air works perfectly. I highly recommend this filter and it has good build quality too.
7 people found this helpful
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Patrick
5.0 out of 5 stars Does a superb job of blocking out local fm stations and boosting the signal from the NOAA satellites
Reviewed in the United States on September 6, 2021
Verified Purchase
Theres an fm broadcast tower maybe 10 miles from me and I cannot see the signal at all with the filter on. The filtering is always on, but the lna can be turned on or off by applying or removing power. If you plan on powering it via usb instead of biastee you may need a dc block. I know I needed one for my RTLSDR V3.

Only gripe I have is the silkscreening is already almost completely gone after about a month and a half of use. Its only cosmetic so I didnt feel the need to dock the review
Customer image
Patrick
5.0 out of 5 stars Does a superb job of blocking out local fm stations and boosting the signal from the NOAA satellites
Reviewed in the United States on September 6, 2021
Theres an fm broadcast tower maybe 10 miles from me and I cannot see the signal at all with the filter on. The filtering is always on, but the lna can be turned on or off by applying or removing power. If you plan on powering it via usb instead of biastee you may need a dc block. I know I needed one for my RTLSDR V3.

Only gripe I have is the silkscreening is already almost completely gone after about a month and a half of use. Its only cosmetic so I didnt feel the need to dock the review
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JD
4.0 out of 5 stars Good, but has problems with strong FM signals
Reviewed in the United States on September 14, 2021
Verified Purchase
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.
5 people found this helpful
Helpful
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Michael Matirko
5.0 out of 5 stars Worked even better than expected
Reviewed in the United States on February 13, 2023
Verified Purchase
I've got two Nooelec SDR dongles that I use for ADS-B and UAT. I was looking for an LNA, and I ordered both this and the Lana LNA. I received this a few days before the LNA however, and decided "why not plug it in now."

I am not super sure how the local FM stations can be causing so much interference to my SDRs when receiving ADS-B (1090mhz), but after plugging this in, I am seeing 3-5 times the positions reported when compared with just the SDRs.

I installed the filter at 3PM on 2/12. Since then, I had over double the positions reported on the 12th, and around four times of my "normal" 20k positions today on the 13th (see the attached picture). I also noticed my peak message rate, prior to sending it to FR24/FA went from ~40msgs/sec at peak, to over 200!
Customer image
Michael Matirko
5.0 out of 5 stars Worked even better than expected
Reviewed in the United States on February 13, 2023
I've got two Nooelec SDR dongles that I use for ADS-B and UAT. I was looking for an LNA, and I ordered both this and the Lana LNA. I received this a few days before the LNA however, and decided "why not plug it in now."

I am not super sure how the local FM stations can be causing so much interference to my SDRs when receiving ADS-B (1090mhz), but after plugging this in, I am seeing 3-5 times the positions reported when compared with just the SDRs.

I installed the filter at 3PM on 2/12. Since then, I had over double the positions reported on the 12th, and around four times of my "normal" 20k positions today on the 13th (see the attached picture). I also noticed my peak message rate, prior to sending it to FR24/FA went from ~40msgs/sec at peak, to over 200!
Images in this review
Customer image
Customer image
2 people found this helpful
Helpful
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MadPB
5.0 out of 5 stars Seems to do what it's designed to do
Reviewed in the United States on November 2, 2020
Verified Purchase
I got this because I was seeing a lot of harmonic interference from FM radio when scanning with my SDR. I'd scan and see some weird signal in the higher frequencies, so I'd tune to it and... hey, it's a harmonic of one of the strong broadcast stations. I'm pretty far from the towers so I really wouldn't have thought I'd need this, but apparently so.

The harmonics are definitely diminished, and the original frequencies are still somewhat tunable, although I'm not normally using my SDR to listen to FM radio. I've been able to tune into some broadcasts that were being drowned out before, so I'm pretty happy about it.

No technical measurements really, just anecdotal. I really should do a before/after where I'm on a frequency with strong interference, then add this filter in and see how much it attenuates. I may do that later and then update with some actual #'s. But otherwise, I'm pretty happy with this.
One person found this helpful
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J. W.
5.0 out of 5 stars Great Product
Reviewed in the United States on August 28, 2023
Verified Purchase
Tested with a Spectrum Analyzer/Tracking Generator. Very good FM band rejection.
One person found this helpful
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Top reviews from other countries

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rp
5.0 out of 5 stars Great Filter
Reviewed in Canada on April 12, 2023
Verified Purchase
As expected from Nooelec, the manufacturing quality is great and this really shines when connected filtering all the strong FM stations around me. Recommend.
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Donaciano S.
5.0 out of 5 stars Un filtro que trabaja perfectamente
Reviewed in Mexico on October 21, 2022
Verified Purchase
Este filtro para atenuar las señales de FM en receptores muy sensibles es muy efectivo. Al instalarlo a un radioscaner de frecuencias cercanas al FM, las eliminó completamente para poder escuchar con claridad las otras frecuencias.
La marca es excelente y fabrica buenos productos.
One person found this helpful
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Lucas
5.0 out of 5 stars Fonctionne parfaitement avec une SDR
Reviewed in France on August 10, 2024
Verified Purchase
Remplit très bien son rôle. Je l'utilise sur des récepteurs SDR afin de supprimer des harmoniques d'émetteurs FM proches sur les autres bandes. Le résultat est excellent.
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Roberto F.
5.0 out of 5 stars Un buon investimento per migliorare la ricezione di un ricevitore.
Reviewed in Italy on May 5, 2024
Verified Purchase
Costa un po' di più rispetto ai filtri cinesi nobrand ma fa decisamente meglio il suo lavoro.
I nobrand che mi sono capitati fra le mani hanno spesso la spiacevole tendenza a filtrare solo la parte bassa della gamma usata dalle radio commerciali, questo invece taglia decisamente tutta la banda 88-108.
Consigliato sempre a tutti i possessori di sdr e scanner quando si utilizzano antenne esterne.
In caso lo vogliate usare con il gommino in dotazione su uno scanner portatile, tenete comunque presente le perdite di inserzione del filtro che, soprattutto in banda aerea, possono essere importanti (vedi seconda immagine inserita).
Nota: dai valori riportati nei diagrammi vanno tolti circa 0.10 dB di perdita dovuta ai vari cavi ed adattatori usati per collegare il filtro all'analizzatore. Quindi, ad esempio, a 145Mhz la perdita dovuta al solo filtro sarà di 0.78dB.
Customer image
Roberto F.
5.0 out of 5 stars Un buon investimento per migliorare la ricezione di un ricevitore.
Reviewed in Italy on May 5, 2024
Costa un po' di più rispetto ai filtri cinesi nobrand ma fa decisamente meglio il suo lavoro.
I nobrand che mi sono capitati fra le mani hanno spesso la spiacevole tendenza a filtrare solo la parte bassa della gamma usata dalle radio commerciali, questo invece taglia decisamente tutta la banda 88-108.
Consigliato sempre a tutti i possessori di sdr e scanner quando si utilizzano antenne esterne.
In caso lo vogliate usare con il gommino in dotazione su uno scanner portatile, tenete comunque presente le perdite di inserzione del filtro che, soprattutto in banda aerea, possono essere importanti (vedi seconda immagine inserita).
Nota: dai valori riportati nei diagrammi vanno tolti circa 0.10 dB di perdita dovuta ai vari cavi ed adattatori usati per collegare il filtro all'analizzatore. Quindi, ad esempio, a 145Mhz la perdita dovuta al solo filtro sarà di 0.78dB.
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Customer imageCustomer image
3 people found this helpful
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JAFA-Lidercom
5.0 out of 5 stars FM Notch Filter
Reviewed in Spain on April 16, 2024
Verified Purchase
Antes de mais é importante referir de que se trata de um acessório de pequenas dimensões, querendo com isto dizer que, os componentes utilizados para a construção do filtro são de reduzido tamanho, SMD.
Produto com qualidade
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