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๐Ÿ“ป fm bandstop filter v2 (fm notch filter) - flamingo+ fm - enhancing software defined radio (rtl-sdr) applications by blocking interfering 88-108mhz frequencies from sma-connected radios logo

๐Ÿ“ป FM Bandstop Filter v2 (FM Notch Filter) - Flamingo+ FM - Enhancing Software Defined Radio (RTL-SDR) Applications by Blocking Interfering 88-108MHz Frequencies from SMA-Connected Radios Review

3

ยท

Very good

Revainrating 4.5 out of 5ย ย 
Ratingย 
4.7
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Description of ๐Ÿ“ป FM Bandstop Filter v2 (FM Notch Filter) - Flamingo+ FM - Enhancing Software Defined Radio (RTL-SDR) Applications by Blocking Interfering 88-108MHz Frequencies from SMA-Connected Radios

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.

Reviews

Global ratings 3
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    1
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Type of review

Revainrating 4 out of 5

If in doubt, get V2. The older model can only be used to a limited extent.

This is a much better filter than the original model for most applications requiring an FM tag. His shoulders are much sharper and so you can use the planes band, which is almost useless with the V1 filter. (See my sweeps above for both filters. The V2 filter is much sharper of the two.) Attached, this is just a reference image of what you will receive to show its overall size compared to the N-SMA adapter and load . This gives you an idea of how small it really is. These things are about theโ€ฆ

Pros
  • Flamingo+ FM has higher attenuation than other similar commercial filters, as well as lower insertion loss outside the stopband (&lt;0.25dB average) and less impact on the adjacent VHF 108-137MHz HF band (8dB average). Attenuation compared to an average of 16 dB for similar filters)
Cons
  • Requires Socket

Revainrating 5 out of 5

Works great, solved my interference problem. Bidirectional and can be used to transmit 5W.

This well made FM bandpass filter solved my problem when Radio Amor 100.3 FM was overloading my SDR transceiver. 100.3 FM with 14.5 kW for 10 miles distance was blocked filter. Success! The filter is labeled input and output side, which means you must use it with an antenna connected to the input. I tested the filter and as you can see from the pictures the filter is non-directional and you can use it in any orientation. Since the filter is bi-directional I use it in a QRP transceiver and haveโ€ฆ

Pros
  • Designed and manufactured by Nooelec in North America with a full 2 year product warranty
Cons
  • No Instructions

Revainrating 5 out of 5

It appears to do what it was designed to do

I have Received this because I saw a lot of harmonic interference from VHF radio when scanning with my SDR. I scanned and saw a strange signal at high frequencies so tuned in and. Hey, that's the harmonica from one of the big radio stations. I'm pretty far from towers so I didn't really think I'd need it, but apparently I do. The overtones are definitely reduced and the original frequencies are still somewhat in tune, although I don't normally use my SDR. to listen to FM radio. I was able toโ€ฆ

Pros
  • Flamingo+ FM (Flamingo FM v2) is a high-attenuation band-reject filter designed to prevent overloading of very strong FM broadcasts and other problems with your radio or SDR
Cons
  • Long wait