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Ten-Tec Model 219, 9 MHz 6 Pole 250 Hz CW Crystal Filter NEW in Box

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MPN:
219
Condition:
New
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$8.00 (Fixed Shipping Cost)
  • Ten-Tec Model 219, 9 MHz 6 Pole 250 Hz CW Crystal Filter NEW in Box
  • Ten-Tec Model 219, 9 MHz 6 Pole 250 Hz CW Crystal Filter NEW in Box
  • Ten-Tec Model 219, 9 MHz 6 Pole 250 Hz CW Crystal Filter NEW in Box
$79.99
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Description

Ten-Tec Model 219, 9 MHz 6 Pole 250 Hz CW Crystal Filter NEW in Box

 
Ten-Tec Model 219 is a 9 MHz 6-pole crystal ladder filter with a 250 Hz bandwidth (at -6 dB), designed as an optional narrow CW filter for enhanced selectivity in very crowded bands or weak-signal work. It offers a tight passband with good shape factor (around 2:1 typical) for rejecting nearby interference while passing clean CW tones. It's part of the classic 9 MHz filter series (216/217/218/219/220/221), but unlike the 8-pole 217 (500 Hz), the 219 is a 6-pole design centered around 9.000750 MHz (optimized for ~750 Hz CW offsets in most compatible rigs; differs from the 221's lower 500 Hz centering for variable-offset models).Key Details and Specifications
  • Bandwidth: 250 Hz (nominal at -6 dB).
  • Poles: 6-pole ladder configuration.
  • Center Frequency: ~9.000750 MHz (passband aligned for standard Ten-Tec CW offsets of 600–750 Hz; not ideal for very low offsets without adjustment).
  • Shape Factor: Good for its class (sharp enough for serious CW contesting/DX).
  • Installation: Plug-in internal board (slots into IF filter positions per rig manual; may need minor alignment or jumper settings in some models).
  • Era: Late 1970s/1980s onward, widely used in classic Ten-Tec gear.
  • Build: Shielded module with high-quality crystals; durable vintage component.
Compatible RadiosThe Model 219 fits Ten-Tec transceivers with a 9 MHz IF stage supporting these ladder filters. Compatible models include:
  • Omni Series: Omni A, B, C (Model 546), Omni V (Model 562/563/564; usable in 9 MHz positions, though prefer 6.3 MHz filters first in later ones).
  • Corsair / Corsair II (Models 560/561).
  • Argosy / Argosy II (Models 525/525D).
  • Delta 580 (and Delta II 536 in compatible slots).
  • Paragon / Paragon II.
  • Omni VI / Omni VI+ (Models 563/564; in 9 MHz slots; note: for very low CW offsets <500 Hz, the Model 221 is preferred instead).
  • Orion / Orion I (Model 565; optional in some IF positions, per manual references).
  • Others: Early Omni series, some Argonaut mods, and cross-compatible rigs in the 9 MHz ladder family.
Confirm exact fit, centering, and any mods with the rig's manual or TentecWiki (e.g., fixed offsets in most models make the 219 well-suited; variable offset in Omni VI+ allows flexibility). Not for later DSP-based rigs like Jupiter, Omni VII, or Eagle (different
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