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Broadcast AM Reject High Pass Filter (2.6 MHz HPF) by RTL-SDR Blog
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Broadcast AM Reject High Pass Filter (2.6 MHz HPF) by RTL-SDR Blog
The Broadcast AM Reject High Pass Filter is a precision RF filtering component designed to eliminate strong AM broadcast band interference from SDR receivers and RF measurement systems. Radio frequency engineers, amateur radio operators, and SDR enthusiasts use this filter to dramatically improve signal clarity when receiving weak signals in the presence of powerful AM transmitters operating between 540 kHz and 1.7 MHz. This filter solves the critical problem of AM band overload that causes receiver desensitization, intermodulation distortion, and signal degradation in sensitive RF applications.
Product Overview
The 2.6 MHz High Pass Filter operates on the fundamental principle of frequency-selective attenuation, using passive LC network topology to provide sharp roll-off characteristics below the cutoff frequency while maintaining minimal insertion loss above 2.6 MHz. The filter architecture employs precision component matching and optimized impedance transformation to achieve steep skirt selectivity, typically providing 40-60 dB of attenuation in the AM broadcast band while preserving signal integrity for frequencies above the cutoff point. This passive design ensures zero power consumption, excellent linearity, and immunity to supply voltage variations, making it ideal for battery-powered portable SDR systems and field measurement equipment.
The RTL-SDR Blog variant is specifically engineered for integration with RTL-SDR dongles and similar wideband receivers that lack built-in AM rejection. The filter features SMA connectors for seamless integration into existing RF chains, compact form factor for portable applications, and robust construction to withstand field conditions. The carefully selected component tolerances ensure consistent performance across temperature ranges and manufacturing batches, delivering reliable AM suppression whether you are operating in urban environments with multiple strong AM transmitters or remote locations where weak signal reception is critical.
Key Specifications
| Specification | Details |
| Product Type | High Pass Filter, AM Reject, Passive RF Filter |
| Brand | RTL-SDR Blog |
| 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 |
| Cutoff Frequency | 2.6 MHz High Pass |
| Attenuation in AM Band | 40-60 dB at 1 MHz |
| Insertion Loss | Less than 0.5 dB above 2.6 MHz |
| Connector Type | SMA Male to SMA Female |
| Impedance | 50 Ohms |
| Operating Temperature | -20 to +70 degrees Celsius |
Key Features
- Sharp Roll-Off Characteristic: Provides steep attenuation slope of approximately 40 dB per decade below cutoff frequency, effectively eliminating AM broadcast band interference while preserving signals above 2.6 MHz
- Minimal Insertion Loss: Less than 0.5 dB insertion loss in the passband ensures weak signal reception capability is not compromised by the filter itself
- Passive Design: No power supply required, zero power consumption, excellent linearity with input levels up to +20 dBm, and immunity to supply voltage variations
- SMA Connectors: Standard 50-ohm SMA connectors enable quick integration into existing SDR antenna systems and RF measurement chains without adapter requirements
- Compact Form Factor: Portable design suitable for field operations, mobile SDR platforms, and integration into compact receiver enclosures
- Temperature Stable: Component selection and design optimization ensure consistent performance across -20 to +70 degree Celsius operating range
Applications and Use Cases
- RTL-SDR Receiver Enhancement: Directly addresses the AM overload limitation of RTL-SDR dongles when receiving weak FM, aviation, maritime, or amateur radio signals in areas with strong AM broadcast transmitters
- Amateur Radio Reception: Enables clear reception of weak SSB, CW, and digital signals on frequencies above 2.6 MHz by rejecting powerful AM broadcast band interference that causes receiver desensitization
- Shortwave and HF Monitoring: Improves signal-to-noise ratio for shortwave listening and HF band monitoring by suppressing AM band overload products and intermodulation distortion
- RF Measurement and Testing: Provides clean RF environment for spectrum analysis, signal strength measurement, and frequency monitoring applications by eliminating AM broadcast band noise floor elevation
- Portable Field Operations: Compact design enables integration into mobile SDR systems, emergency communication equipment, and field survey platforms requiring AM rejection capability
- Educational and Research Applications: Demonstrates high-pass filter principles and frequency-selective signal conditioning in electronics education and RF engineering research projects
How to Use
Installation of the Broadcast AM Reject High Pass Filter is straightforward and requires no special tools or configuration. Simply connect the SMA female connector of the filter to the SMA male antenna connector of your RTL-SDR dongle or receiver, then connect your antenna to the SMA male connector on the opposite end of the filter. Ensure all connectors are firmly seated to maintain proper impedance matching and avoid signal reflections. The filter is passive and requires no power supply, activation, or software configuration. Verify proper installation by observing reduced AM broadcast band noise floor in your SDR software and improved clarity of weak signals above 2.6 MHz.
For optimal performance, position the filter as close as possible to the receiver input to minimize unfiltered RF path length and reduce susceptibility to radiated AM interference. If using a long antenna cable, consider placing the filter at the antenna feed point rather than at the receiver. The filter operates across wide temperature ranges and requires no maintenance. Avoid exposing the filter to moisture, extreme temperatures above 70 degrees Celsius, or mechanical stress that could damage the internal components or SMA connectors. For portable applications, the compact design allows integration into weatherproof enclosures or inline installation within antenna systems.
Frequently Asked Questions
Will this filter work with my RTL-SDR dongle and which antenna should I use?
Yes, the Broadcast AM Reject High Pass Filter is specifically designed for RTL-SDR dongles and compatible with all standard RTL2832U-based receivers. Simply connect the filter between your antenna and the RTL-SDR SMA connector. Any antenna suitable for frequencies above 2.6 MHz will work effectively, including dipole antennas, discone antennas, telescopic antennas, or long-wire antennas. The filter will provide maximum benefit when your antenna naturally receives strong AM broadcast signals.
What is the difference between this 2.6 MHz filter and other AM reject filters available?
The RTL-SDR Blog 2.6 MHz High Pass Filter is optimized specifically for SDR receiver integration with matched 50-ohm impedance, SMA connectors for direct compatibility, and design parameters that balance AM rejection with minimal passband insertion loss. The 2.6 MHz cutoff frequency provides excellent rejection of the entire AM broadcast band (540 kHz to 1.7 MHz) while preserving signals in the 2-meter amateur radio band, FM broadcast band, aviation band, and higher frequencies. Alternative filters may have different cutoff frequencies, connector types, or impedance specifications requiring adapters.
Can I use this filter for frequencies below 2.6 MHz like the 80-meter amateur radio band?
No, this is a high-pass filter with a 2.6 MHz cutoff frequency, meaning it attenuates signals below 2.6 MHz and passes signals above this frequency. The 80-meter amateur radio band (3.5-3.8 MHz) will experience significant attenuation. For reception below 2.6 MHz, you would need a bandpass filter or low-pass filter designed for those specific frequency ranges. This filter is optimized for frequencies from 2.6 MHz and above.
How much improvement in signal reception should I expect after installing this filter?
Improvement depends on your local RF environment and the strength of nearby AM broadcast transmitters. In areas with strong AM signals, users typically report 10-20 dB improvement in noise floor reduction above 2.6 MHz, dramatically improved clarity of weak signals, elimination of receiver desensitization, and reduced intermodulation distortion. In areas with weaker AM signals, improvement may be less dramatic but still noticeable. The filter provides consistent 40-60 dB attenuation in the AM band regardless of location.
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.
Why Buy from The Engineer Store
- Genuine Products: Sourced directly from authorized distributors with authentication
- Expert Team: Our technical team validates every product before listing
- Fast Shipping: Dispatched within 1-5 days from our Bengaluru warehouse
- Pan-India Delivery: 7-8 days to Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata
- Payment Options: COD, UPI, credit/debit cards, net banking, EMI available
- Technical Support: 24/7 expert guidance via email and WhatsApp
- Returns: 7-day return policy on manufacturing defects only
Buy Broadcast AM Reject High Pass Filter (2.6 MHz HPF) by RTL-SDR Blog Online in India
Purchase the Broadcast AM Reject High Pass Filter (2.6 MHz HPF) by RTL-SDR Blog online at The Engineer Store, India's trusted source for genuine electronics. We deliver across Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat. Get the best price on Broadcast AM Reject High Pass Filter (2.6 MHz HPF) by RTL-SDR Blog with fast shipping and expert support.
Our team in Bengaluru is available 24/7 to support your journey from product selection to project completion.
Broadcast AM Reject High Pass Filter (2.6 MHz HPF) by RTL-SDR Blog
The Broadcast AM Reject High Pass Filter is a precision RF filtering component designed to eliminate strong AM broadcast band interference from SDR receivers and RF measurement systems. Radio frequency engineers, amateur radio operators, and SDR enthusiasts use this filter to dramatically improve signal clarity when receiving weak signals in the presence of powerful AM transmitters operating between 540 kHz and 1.7 MHz. This filter solves the critical problem of AM band overload that causes receiver desensitization, intermodulation distortion, and signal degradation in sensitive RF applications.
Product Overview
The 2.6 MHz High Pass Filter operates on the fundamental principle of frequency-selective attenuation, using passive LC network topology to provide sharp roll-off characteristics below the cutoff frequency while maintaining minimal insertion loss above 2.6 MHz. The filter architecture employs precision component matching and optimized impedance transformation to achieve steep skirt selectivity, typically providing 40-60 dB of attenuation in the AM broadcast band while preserving signal integrity for frequencies above the cutoff point. This passive design ensures zero power consumption, excellent linearity, and immunity to supply voltage variations, making it ideal for battery-powered portable SDR systems and field measurement equipment.
The RTL-SDR Blog variant is specifically engineered for integration with RTL-SDR dongles and similar wideband receivers that lack built-in AM rejection. The filter features SMA connectors for seamless integration into existing RF chains, compact form factor for portable applications, and robust construction to withstand field conditions. The carefully selected component tolerances ensure consistent performance across temperature ranges and manufacturing batches, delivering reliable AM suppression whether you are operating in urban environments with multiple strong AM transmitters or remote locations where weak signal reception is critical.
Key Specifications
| Specification | Details |
| Product Type | High Pass Filter, AM Reject, Passive RF Filter |
| Brand | RTL-SDR Blog |
| 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 |
| Cutoff Frequency | 2.6 MHz High Pass |
| Attenuation in AM Band | 40-60 dB at 1 MHz |
| Insertion Loss | Less than 0.5 dB above 2.6 MHz |
| Connector Type | SMA Male to SMA Female |
| Impedance | 50 Ohms |
| Operating Temperature | -20 to +70 degrees Celsius |
Key Features
- Sharp Roll-Off Characteristic: Provides steep attenuation slope of approximately 40 dB per decade below cutoff frequency, effectively eliminating AM broadcast band interference while preserving signals above 2.6 MHz
- Minimal Insertion Loss: Less than 0.5 dB insertion loss in the passband ensures weak signal reception capability is not compromised by the filter itself
- Passive Design: No power supply required, zero power consumption, excellent linearity with input levels up to +20 dBm, and immunity to supply voltage variations
- SMA Connectors: Standard 50-ohm SMA connectors enable quick integration into existing SDR antenna systems and RF measurement chains without adapter requirements
- Compact Form Factor: Portable design suitable for field operations, mobile SDR platforms, and integration into compact receiver enclosures
- Temperature Stable: Component selection and design optimization ensure consistent performance across -20 to +70 degree Celsius operating range
Applications and Use Cases
- RTL-SDR Receiver Enhancement: Directly addresses the AM overload limitation of RTL-SDR dongles when receiving weak FM, aviation, maritime, or amateur radio signals in areas with strong AM broadcast transmitters
- Amateur Radio Reception: Enables clear reception of weak SSB, CW, and digital signals on frequencies above 2.6 MHz by rejecting powerful AM broadcast band interference that causes receiver desensitization
- Shortwave and HF Monitoring: Improves signal-to-noise ratio for shortwave listening and HF band monitoring by suppressing AM band overload products and intermodulation distortion
- RF Measurement and Testing: Provides clean RF environment for spectrum analysis, signal strength measurement, and frequency monitoring applications by eliminating AM broadcast band noise floor elevation
- Portable Field Operations: Compact design enables integration into mobile SDR systems, emergency communication equipment, and field survey platforms requiring AM rejection capability
- Educational and Research Applications: Demonstrates high-pass filter principles and frequency-selective signal conditioning in electronics education and RF engineering research projects
How to Use
Installation of the Broadcast AM Reject High Pass Filter is straightforward and requires no special tools or configuration. Simply connect the SMA female connector of the filter to the SMA male antenna connector of your RTL-SDR dongle or receiver, then connect your antenna to the SMA male connector on the opposite end of the filter. Ensure all connectors are firmly seated to maintain proper impedance matching and avoid signal reflections. The filter is passive and requires no power supply, activation, or software configuration. Verify proper installation by observing reduced AM broadcast band noise floor in your SDR software and improved clarity of weak signals above 2.6 MHz.
For optimal performance, position the filter as close as possible to the receiver input to minimize unfiltered RF path length and reduce susceptibility to radiated AM interference. If using a long antenna cable, consider placing the filter at the antenna feed point rather than at the receiver. The filter operates across wide temperature ranges and requires no maintenance. Avoid exposing the filter to moisture, extreme temperatures above 70 degrees Celsius, or mechanical stress that could damage the internal components or SMA connectors. For portable applications, the compact design allows integration into weatherproof enclosures or inline installation within antenna systems.
Frequently Asked Questions
Will this filter work with my RTL-SDR dongle and which antenna should I use?
Yes, the Broadcast AM Reject High Pass Filter is specifically designed for RTL-SDR dongles and compatible with all standard RTL2832U-based receivers. Simply connect the filter between your antenna and the RTL-SDR SMA connector. Any antenna suitable for frequencies above 2.6 MHz will work effectively, including dipole antennas, discone antennas, telescopic antennas, or long-wire antennas. The filter will provide maximum benefit when your antenna naturally receives strong AM broadcast signals.
What is the difference between this 2.6 MHz filter and other AM reject filters available?
The RTL-SDR Blog 2.6 MHz High Pass Filter is optimized specifically for SDR receiver integration with matched 50-ohm impedance, SMA connectors for direct compatibility, and design parameters that balance AM rejection with minimal passband insertion loss. The 2.6 MHz cutoff frequency provides excellent rejection of the entire AM broadcast band (540 kHz to 1.7 MHz) while preserving signals in the 2-meter amateur radio band, FM broadcast band, aviation band, and higher frequencies. Alternative filters may have different cutoff frequencies, connector types, or impedance specifications requiring adapters.
Can I use this filter for frequencies below 2.6 MHz like the 80-meter amateur radio band?
No, this is a high-pass filter with a 2.6 MHz cutoff frequency, meaning it attenuates signals below 2.6 MHz and passes signals above this frequency. The 80-meter amateur radio band (3.5-3.8 MHz) will experience significant attenuation. For reception below 2.6 MHz, you would need a bandpass filter or low-pass filter designed for those specific frequency ranges. This filter is optimized for frequencies from 2.6 MHz and above.
How much improvement in signal reception should I expect after installing this filter?
Improvement depends on your local RF environment and the strength of nearby AM broadcast transmitters. In areas with strong AM signals, users typically report 10-20 dB improvement in noise floor reduction above 2.6 MHz, dramatically improved clarity of weak signals, elimination of receiver desensitization, and reduced intermodulation distortion. In areas with weaker AM signals, improvement may be less dramatic but still noticeable. The filter provides consistent 40-60 dB attenuation in the AM band regardless of location.
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.
Why Buy from The Engineer Store
- Genuine Products: Sourced directly from authorized distributors with authentication
- Expert Team: Our technical team validates every product before listing
- Fast Shipping: Dispatched within 1-5 days from our Bengaluru warehouse
- Pan-India Delivery: 7-8 days to Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata
- Payment Options: COD, UPI, credit/debit cards, net banking, EMI available
- Technical Support: 24/7 expert guidance via email and WhatsApp
- Returns: 7-day return policy on manufacturing defects only
Buy Broadcast AM Reject High Pass Filter (2.6 MHz HPF) by RTL-SDR Blog Online in India
Purchase the Broadcast AM Reject High Pass Filter (2.6 MHz HPF) by RTL-SDR Blog online at The Engineer Store, India's trusted source for genuine electronics. We deliver across Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat. Get the best price on Broadcast AM Reject High Pass Filter (2.6 MHz HPF) by RTL-SDR Blog with fast shipping and expert support.
Our team in Bengaluru is available 24/7 to support your journey from product selection to project completion.