Dorne & Margolin Aircraft NAV/COM Receiver Diplexer

Model: DM H21-1
Manufacturer: Dorne & Margolin, Inc.
Serial Number: 9651

Offered for sale is a genuine Dorne & Margolin DM H21-1 aircraft NAV diplexer, designed to allow multiple navigation receivers to operate from a single antenna system.

This avionics component distributes signals between VOR/LOC, glide slope, and marker beacon receivers, enabling efficient antenna sharing within aircraft navigation systems.

Manufactured in Bohemia, New York, Dorne & Margolin diplexers are widely used in certified aircraft avionics installations and are known for their reliability and signal integrity.

Typical Frequency Ranges
• VOR / Localizer: 108–118 MHz
• Glide Slope: 329–335.3 MHz
• Marker Beacon: 74.75–75.25 MHz

Performance
• VSWR VOR/LOC:
Condition
Pre-owned avionics component in excellent condition and tested functional.

Shows normal cosmetic wear from previous installation.

Please review all photos carefully — the unit shown is exactly what will be shipped.

Weight 0.625 lbs
Dimensions 10 × 3 × 4 in
Brand

Dorne & Margolin DM H21-1 H 21 1 H21 Diplexer

Manufacturer Part Number

Dorne & Margolin DM H21-1 H 21 1 H21 Diplexer

Manufacturer

Dorne & Margolin, Inc.

MPN

Dorne & Margolin DM H21-1 H 21 1 H21 Diplexer

Country/Region of Manufacture

US

Condition

Used

Condition Details

See Pictures for Details Nice, pre-owned and tested unit fully functional Guaranteed to pass your Inspection or your money back

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Dorne & Margolin DM H21-1 ...

$89.00