FM Notch Bandstop Filter For Software Defined Radio RTL SDR Notch Block 88 To 108 MHz Broadcast Signals With Ultra High Attenuation Preventing Receiver Overload On SMA Connected Radios

FM Notch Bandstop Filter for SDR: Blocks 88-108 MHz
✔️ Ultra-high attenuation (>60dB avg, >70dB max) blocks FM signals

This high-attenuation FM notch filter protects SDRs and FM receivers from overload caused by very strong broadcast FM signals. It’s typically used in urban environments with nearby high-wattage FM transmitters to keep front-end RF stages from saturating.

✅ Attenuation: >60dB avg, >70dB max within 88-108 MHz stop band
✅ Stop band: 88-108 MHz blocks broadcast FM transmissions to prevent overload
✅ Insertion loss: <0.25dB avg outside stop band preserves sensitivity
✅ Adjacent band impact: ~8dB avg attenuation at 108-137 MHz
✅ Construction: SMA-connected radios, black finish, North America design, 2-year warranty

💡 What is an FM notch bandstop filter used for in SDR setups and why is it handy in high-FM areas?

It helps keep receivers stable by suppressing overpowering FM transmissions with strong attenuation. - Blocks 88-108 MHz broadcast FM with high attenuation to protect SDR front-ends
- Maintains sensitivity outside the stop band with low insertion loss (<0.25dB)
- Designed for SMA-connected radios and North American builds with a 2-year warranty
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