This Reactel 10CX9-1247.5-X65S11 is a precision engineered RF filter from Reactel Inc., a leader in RF & microwave filters and integrated assemblies.
Key Specifications & Features:
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Center frequency: 1247.5 MHz (as indicated by the “-1247.5” in the part number)
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Filter series: “CX9” (Reactel series designation)
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Connector/packaging style: “X65S11” (as per part numbering)
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High selectivity band-pass filter, manufactured using Reactel’s cavity/combline/tubular technology (Reactel offers cavity filters covering from ~30 MHz up to tens of GHz)
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Excellent VSWR and insertion-loss performance typical of Reactel units (Reactel standard cavity filters: typical VSWR ≤1.5:1)
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Rugged construction, suitable for aerospace/defense (Reactel is ISO-9001 accredited and supplies filters for military/commercial markets)
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Intended for 50 Ω system (since Reactel predominantly designs for 50 Ω unless otherwise noted)
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Temperature range: often –55 °C to +125 °C
Applications:
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RF subsystem filtering at ~1.25 GHz (e.g., telemetry, satellite, communications)
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Co-site interference mitigation, base-station filtering, radar subsystem filter
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Lab instrumentation, engineering test setups, research & defense electronics
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Any system needing a cavity/combline band-pass filter with high selectivity around 1.25 GHz



