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Collins Mechanical 1.9 KHz SSB Filter, Type F 455 FD 19 (P/N 526 9691 020), NOS

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MPN:
526 9691 020
Condition:
New
Shipping:
$9.00 (Fixed Shipping Cost)
  • NOS Collins Mechanical Filter Type F 455 FD 19, Part 526 9691 020. 455 kHz IF bandpass, ~1.9 kHz bandwidth for superior selectivity in Collins S-Line receivers, KWM transceivers, or adaptable to Icom R75 and others. High-quality vintage ham radio part, steep skirts, low loss. Perfect restoration or upgrade component. Tested NOS condition. Ships fast
  • NOS Collins Mechanical Filter Type F 455 FD 19, Part 526 9691 020. 455 kHz IF bandpass, ~1.9 kHz bandwidth for superior selectivity in Collins S-Line receivers, KWM transceivers, or adaptable to Icom R75 and others. High-quality vintage ham radio part, steep skirts, low loss. Perfect restoration or upgrade component. Tested NOS condition. Ships fast
  • NOS Collins Mechanical Filter Type F 455 FD 19, Part 526 9691 020. 455 kHz IF bandpass, ~1.9 kHz bandwidth for superior selectivity in Collins S-Line receivers, KWM transceivers, or adaptable to Icom R75 and others. High-quality vintage ham radio part, steep skirts, low loss. Perfect restoration or upgrade component. Tested NOS condition. Ships fast
$124.99
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Description

Collins Mechanical 1.9 KHz SSB Filter, Type F 455 FD 19 (P/N 526 9691 020), NOS

  This filter is new old stock and is in excellent condition.

Compatible Radios and UsesThis is a 455 kHz IF mechanical bandpass filter, primarily associated with Collins/Rockwell Collins amateur (ham) radio equipment, such as S-line receivers (e.g., 75S-3 series) or transceivers (e.g., KWM-2). It serves as a narrower optional or replacement filter for improved selectivity in SSB or CW operation.
 
It has been adapted for use in other radios, such as the Icom R75 receiver (users report successful pin adaptations for the 455 kHz IF). It is a general-purpose high-quality 455 kHz mechanical filter suitable for many vintage or homebrew receivers/transceivers needing sharp IF selectivity.
 
 
The "FD" series (FD19) denotes a specific variant with ~1.9 kHz bandwidth, narrower than common 2.1 kHz filters for tighter SSB or CW performance.
 
 
Specifications
  • Center Frequency: 455 kHz nominal.
     
     
  • Bandwidth: Approximately 1.9 kHz (FD19 designation; likely 6 dB bandwidth around 1.9 kHz, with steep skirts typical of Collins mechanical filters).
     
     
  • Type: Mechanical bandpass filter (disc resonator design with piezoelectric or magnetostrictive transducers).
  • Construction: Encapsulated/sealed case (plug-in pins, often with ground terminals; specific pinout has center pins as ground).
     
     
  • Part Number: 526 9691 020 (Rockwell Collins).
  • Other: Low insertion loss, high stability, excellent shape factor (steep skirts) for its era. Designed for high-performance IF filtering in communications equipment.
     
     
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