New 1090 MHz ADS-B Flight Tracking Cavity filters - Custom Made

Description: These are custom built to my specs based on excellent research by N7UV and 100% quality controlled by me. These are similar to the Sysmocom cavity filters from Germany that are expensive to get in the USA, and that is why I had these built in a factory that specializes in these. These are 4 pole very low loss iris coupled cylindrical filters in "lego" brick form for sale here. Compared to the so-so performance SAW (surface acoustic wave) filters from RB, FR24, the now empty ADSB Ex store and other no name sellers which have losses of up to 4.2 dB or even up to 5.3 dB according to the actual SAW filter chip manufacturers. Even the FA Blue tube LC filter has 2.5 dB loss. These filters have only 0.9 dB loss typical as a guaranteed maximum loss. Most test at about 0.5 dB. Look closely at the Instrument screenshots and you will see the most test at under 0.5 dB loss at 1090 MHz. These filters have SMA connectors. Lower losses mean moar planes spotted! More Range! Wag that SDR dongle proudly (except at Soylent James, Thank You!) as you climb the leader boards at your favorite flight tracking site (except the ADSB community site that sold out to a PE firm in January 2023) with these excellent filters. If these filters don't improve your feed - it's DEAF and you have connector or coax issues. Advantages: lower filter loss means the same performance with longer coax runs, or you can optimize for improved performance. If you keep the same length coax, you still get a system noise figure improvement of up to 2.4 dB, which equals more decodes at low signal levels. Using an external filter also gives you more choices in SDRs. Feeder friends do not allow friends to use filtered SDRs or allow them to send data to the danstabberfatclown site. Many cool kids that feed Airplanes.Live, SDR-E Wingbits and Airframes.io are using these. These filters are Airframes.io approved and sales will directly benefit the Airframes project. These filters are Airplanes.live approved and sales will directly benefit the Airplanes.Live project. Please feed your plane tracking data to Airplanes.live. Note: these are not raintight. If used outdoors, they must be housed in a rain tight enclosure.This filter is fully symmetrical. There is no "in" and "out" terminal.This filter easily exceeds these specs. Complete Specifications: Specification Parameter Filter Type 4 Pole Iris Coupled Cavity Resonator Passband 1087-1093 MHz Bandwidth @ -3dB 12 MHz Insertion Loss ≤1.0dB, .09 Typical at 1090 MHz Passband Ripple ≤0.5dB Max within Passband Return Loss ≥20 dB Rejection ≥80dB @ 921-960 MHz Power Rating 30W (CW) Operating Temp. -20 to +55 C. Connectors SMA – Females -50Ω Dimensions 54 X 54 X 43 mm (2.13 X 2.13 X 1.79”) Excluding the connectors. Paint Color Black Satin

Price: 78.99 USD

Location: Kailua, Hawaii

End Time: 2025-01-15T00:30:47.000Z

Shipping Cost: 10 USD