066-1078-10

Integrated navigation receiver functions

The receiver processes compatible VHF navigation signals for course and approach guidance. VOR information supports radial or course presentation through approved cockpit equipment, while localizer and glideslope functions support lateral and vertical guidance from compatible instrument-landing-system facilities. The marker-beacon receiver provides the corresponding marker information where the aircraft installation includes the required antenna and indication path.

The KNR 634A does not independently present a complete pilot display. It supplies navigation information to compatible indicators, flight displays, audio or annunciation equipment according to the approved installation. Accuracy and availability depend on tuning input, antenna condition, signal coverage, aircraft wiring, station status and the integrity of the associated display path.

Signal paths and associated equipment

A representative VOR or localizer chain is approved tuning source → KNR 634A navigation receiver → NAV antenna and ground transmission → receiver processing → course-deviation and flag outputs → compatible cockpit indicator or flight display. The glideslope path uses its approved antenna and guidance output, while the marker channel uses the marker antenna and cockpit indication or audio path. The exact interfaces must be taken from the installation manual.

The receiver is related to compatible controls, antennas and indicators but is not interchangeable with any one of them. Troubleshooting should separate tuning, power, antenna, RF, receiver, connector and display faults. The capped rear connectors in the photographs are part of the observed unit; mating harnesses, rack, antennas and cockpit indicators are supplied only when stated.

Exact electrical and plate information

The exact plate identifies KNR 634A Navigation Receiver Part Number 066-1078-10 and serial number 12996. It states a weight of 4.8 lb, approximately 2.18 kg. Electrical markings are 28 VDC with 3.0 A peak and 1.1 A nominal, plus 26 VAC at 400 Hz with 3 VA peak and 2 VA nominal. The plate also references TSO C40b, C36c, C34c and C35d together with their associated qualification standards.

Those values belong to the photographed -10 unit and should not be transferred to another suffix. The factory plate also includes FCC identification and DO-160A environmental reference. Exact housing dimensions, rack clearance, connector pin assignment, antenna specifications, output interfaces and cooling requirements must be checked in approved KNR 634A installation data.

Overhauled supply and ordering information

This 066-1078-10 KNR 634A is offered in Overhauled condition from partner stock with a six-month warranty. The quotation will confirm the allocated serial number, overhaul source, release documentation, bench-test status, modification record and included hardware. Rack, mating connectors, antennas, tuning controller, indicators and wiring are not included unless expressly listed.

For an inquiry, specify Part Number 066-1078-10, model KNR 634A, aircraft type, installed tuning and indication equipment, required navigation functions, rack and connector configuration, quantity and certification. Related navigation equipment can be reviewed in the Garmin / BendixKing / Honeywell / Collins category. Related items are not automatically interchangeable, and final eligibility must be established from approved aircraft data.

Return-to-service testing should include each enabled navigation channel, flag behavior, indication polarity, antenna path and the aircraft interfaces defined by the applicable maintenance procedure.