The DM N4-4 navigation antenna system has been designed to minimize bearing errors when receiving VOR and ILS signals. It provides increased gain at the horizon, particularly during banks, than fuselage mounted “deer horn†or “vee†antennas. It can discriminates against vertically polarized signals, and when properly installed on helicopters, it rejects rotor modulation which results in better signal to noise ratios with less errors. Constructed from magnesium tubing, this antenna is lightweight and rugged, and ideal for use on light planes and helicopters.
- Designed to minimize bearing errors when receiving VOR and ILS signals
- Provides increased gain at the horizon, particularly during banks
- Discriminates against vertically polarized signals
Product Codes | |
|---|---|
| Mfr Part No: | DM N4-4 |
| ECCN: | 7A994 |
| NSN: | 5826-00-739-4479 |
| SCHEDULE B CODE: | 8526.10.0010 |
| TSO: | C40a, C36b |
Weight: 2 lb, without cableConnector: BNCMounting: on opposite vertical surfaces of the aircraftFrequency Response: 108 MHz to 122 MHzVSWR: <5.0:1Gain: 0 ±2dBImpedance: 50ΩPolarization Pattern: Omnidirectional in the azimuth plane. Approximately cos. q in the vertical planeEfficiency: 95%Power Handling: Receive OnlyEnvironmental: Military: MIL-E-5400, MIL-T-5422 FAA: TSO-C40a
- Stock: Out of Stock - On Backorder
- Manufacturer Part #: DM N4-4
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Returns & refund summary
- 30-day return window — with prior return authorization, unopened in original packaging.
- Restocking fee: 20% on unopened items, 30% on open-box items.
- Refund processing fee: 5.51% applies to all refunds (returns, cancellations, core-fee refunds) regardless of reason.
- Return shipping: paid by buyer.
- Non-returnable categories: installed/used parts, special-order or rebuilt items, programmed items (incl. ELTs), batteries, AOG-priority orders, international orders.
Full terms: Return Policy.
Authenticity & authorization
All parts sold by American Aviation Parts are genuine factory products sourced through authorized distribution channels. Our authorization status varies by brand — for some brands we are a direct authorized dealer; for others we are an independent reseller through authorized distribution. Either way, the part you receive is the same factory product, with standard documentation available on request.
See our full Manufacturer Authorizations page for the current per-brand status.
Need traceability paperwork?
If your installation requires FAA Form 8130-3, manufacturer Certificate of Conformance, or other traceability documentation, please call 1-877-722-8727 or email [email protected] before placing the order so we can confirm what is available for this part.
Shipping
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