Flamingo+ FM - High Attenuation Broadcast FM Bandstop Filter v2

The Flamingo+ FM is a precision high-attenuation bandstop filter engineered to eliminate broadcast FM interference in the 88-108 MHz band, commonly used in RF shielding and EMI mitigation applications. Professional RF engineers, telecommunications technicians, and broadcast equipment operators rely on this filter to suppress unwanted FM signals that degrade receiver sensitivity and signal integrity in critical communication systems. This product solves the critical problem of FM band interference in sensitive RF circuits, laboratory equipment, and professional audio systems where clean signal reception is essential.

Product Overview

The Flamingo+ FM v2 operates as a passive LC-based bandstop (notch) filter that provides deep attenuation across the entire broadcast FM spectrum while maintaining minimal insertion loss outside the rejection band. The filter employs a multi-pole design architecture that achieves steep roll-off characteristics, typically 40-60 dB per octave, ensuring that FM broadcast signals are suppressed by 40+ dB at center frequency while preserving signal integrity in adjacent frequency bands. This design principle makes it ideal for applications requiring surgical frequency rejection without affecting out-of-band performance.

Version 2 of the Flamingo+ FM incorporates improved component tolerances, enhanced thermal stability, and optimized impedance matching for 50-ohm systems. The filter features low-loss connectors, compact form factor suitable for inline installation, and robust shielding to prevent re-radiation of suppressed signals. The upgraded design reduces group delay distortion and provides consistent performance across temperature variations from -10°C to +60°C, making it reliable for both laboratory and field deployment scenarios where environmental conditions may fluctuate.

Key Specifications

Specification	Details
Product Type	High Attenuation Broadcast FM Bandstop Filter
Brand	Flamingo+
Model	FM v2
Origin	Original/Authentic
Warranty	7 days on manufacturing defects
Shipping	1-5 days from Bengaluru
Delivery	7-8 days across India
Support	24/7 via Email and WhatsApp
Frequency Band	88-108 MHz (Broadcast FM)
Attenuation at Center Frequency	40+ dB
Insertion Loss (Out-of-Band)	Less than 0.5 dB
Impedance	50 Ohms
Connector Type	SMA or N-Type (as specified)
Operating Temperature Range	-10°C to +60°C

Key Features

• Deep Notch Attenuation: Achieves 40+ dB suppression across the entire 88-108 MHz FM broadcast band, effectively eliminating interference at source
• Low Out-of-Band Insertion Loss: Maintains less than 0.5 dB loss outside the rejection band, preserving signal strength in adjacent frequencies
• Steep Roll-Off Characteristics: Multi-pole filter design provides 40-60 dB per octave roll-off for sharp frequency selectivity and minimal spillover
• 50-Ohm Impedance Matching: Optimized for standard RF systems with minimal VSWR and reflection, ensuring seamless integration into existing setups
• Compact Inline Design: Space-efficient form factor allows direct installation between antenna and receiver without requiring external mounting hardware
• Thermal Stability: Enhanced component tolerances ensure consistent performance across -10°C to +60°C operating range with minimal frequency drift
• Low Group Delay Distortion: Minimizes phase distortion in critical signal paths, important for modulated signal integrity
• Robust Shielding: Prevents re-radiation of suppressed FM signals and minimizes cross-coupling in multi-channel systems

Applications and Use Cases

• Sensitive RF Receiver Protection: Deployed in front of low-noise amplifiers and software-defined radio systems to prevent FM broadcast band saturation and intermodulation distortion
• Laboratory Measurement Systems: Used in precision test equipment and spectrum analyzers where FM interference masks weak signals and degrades measurement accuracy
• Amateur Radio and Shortwave Reception: Eliminates local FM broadcast interference in HF and VHF receiver chains, improving signal-to-noise ratio for weak DX signals
• Professional Audio Recording: Installed in microphone preamplifiers and audio interfaces to suppress FM radio interference that causes audible hum and distortion in studio recordings
• Cellular and Wireless Base Station Filtering: Protects sensitive receiver circuits in cellular infrastructure from adjacent-band FM interference in densely populated urban environments
• Biomedical Equipment: Ensures clean signal acquisition in medical instrumentation where FM interference can corrupt patient monitoring data
• Satellite Ground Station Systems: Prevents terrestrial FM signals from desensitizing satellite receivers operating in adjacent frequency bands

How to Use

Installation of the Flamingo+ FM v2 is straightforward and requires no tuning or adjustment. Connect the filter inline between your antenna or signal source and the receiver input, ensuring proper connector type matching (SMA or N-Type as applicable). Maintain 50-ohm impedance throughout the signal chain by using quality coaxial cables and ensuring all connections are hand-tight to prevent intermittent contact. The filter operates passively without requiring power supply or external control, making it suitable for field deployment and portable applications.

For optimal performance, position the filter as close as possible to the receiver input to minimize the antenna-to-filter cable length, which reduces the chance of FM signals coupling into the receiver before reaching the filter. If using multiple filters in cascade, ensure adequate spacing between units to prevent coupling effects. Monitor your receiver's signal strength and noise floor before and after filter installation to verify the improvement in FM interference rejection. In high-RF-field environments, consider shielding the filter connections with ferrite clamps to further reduce common-mode coupling.

Frequently Asked Questions

What is the difference between the Flamingo+ FM v2 and the original version?

Version 2 incorporates improved component tolerances for tighter frequency response, enhanced thermal stability across wider temperature ranges, optimized impedance matching for lower VSWR, and reduced group delay distortion. These upgrades provide more consistent performance in field conditions and better compatibility with modern RF systems. The v2 also features improved shielding to minimize re-radiation of suppressed signals.

Can this filter be used with different impedance systems like 75-ohm cable television networks?

The Flamingo+ FM v2 is optimized for 50-ohm RF systems. Using it with 75-ohm systems will result in impedance mismatch, causing reflections and reduced attenuation performance. For 75-ohm applications, consult with our technical team to determine if a variant version is available or if impedance matching adapters are suitable for your specific use case.

Does the filter require any power supply or active circuitry?

No, the Flamingo+ FM v2 is a completely passive filter requiring no external power supply, batteries, or active components. It operates purely through passive LC network principles, making it reliable for remote installations, portable equipment, and applications where power availability is limited. This passive design also means zero power consumption and no heat generation.

What is the maximum RF power handling capability?

The Flamingo+ FM v2 is designed for low-power RF signal applications typical in receiver chains and measurement systems. For specific power handling specifications, contact our technical support team as this varies based on connector type and intended application. The filter is not suitable for high-power transmitter output stages.

How does this filter perform with wideband signals or signals spanning multiple frequency bands?

The bandstop design ensures that only the 88-108 MHz FM band is attenuated while frequencies outside this range pass through with minimal loss (less than 0.5 dB). This makes it excellent for applications where you need to preserve signals in HF, VHF, UHF, and microwave bands while eliminating only FM interference. The steep roll-off ensures minimal impact on adjacent frequency bands.

When will I receive my order?

Orders are dispatched within 1-5 business days from our Bengaluru warehouse. Delivery takes 7-8 days to most locations across India.

What is your return and warranty policy?

We offer a 7-day return policy on manufacturing defects only. Contact support within 7 days of receipt for free replacement or full refund. Not applicable for user damage or misuse.

Are bulk discounts available?

Yes, wholesale pricing for orders of 10 or more units. Contact our sales team via WhatsApp or email for a customized bulk quote.

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• Returns: 7-day return policy on manufacturing defects only

Buy Flamingo+ FM - High Attenuation Broadcast FM Bandstop Filter v2 Online in India

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