The KLORTNER KT-70 is a pinless meter that uses a microprocessor for signal processing. Its key features, which are explained in detail in the manual, are:
Forced air cooling is highly recommended for panel-mounted configurations to extend component lifespan.
If you are planning an upgrade or a retrofit, understanding the is the first step. Here is an overview of what you need to know before you turn the first wrench.
Select a position in the radio instrument panel within easy reach of the pilot. Ensure adequate clearance behind the panel for the mounting rack, connectors, and cable harness bends.
The KT 70 should be mounted in the radio stack within clear view of the pilot. While it features highly efficient solid-state circuitry, stacking multiple pieces of avionics creates tight thermal pockets. The manual emphasizes checking for or ensuring adequate passive airflow spacing to protect the internal power supply components. 2. Mounting Rack Deployment Kt 70 Installation Manual
: The unit slides into a tray and is secured with a locking screw on the front bezel. Electrical Interconnect
RG-142 or low-loss specialty cable (e.g., Electronic Cable Specialists 311601).
Cross-check the encoder output against the primary altimeter.
Mount the transponder antenna vertically on the bottom surface of the aircraft fuselage. The KLORTNER KT-70 is a pinless meter that
was a pioneer in the "Silver Crown" line, offering Mode S compatibility in a compact, panel-mounted design. To install it correctly, you need the official documentation—specifically Manual #006-00673-0002 (or the earlier 006-00673-0001). 1. Manual Overview & Key Specifications The KT 70 installation manual typically spans about
Display jumps ±10°C. Solution: Reroute sensor wires away from power cables (inductive coupling). Use shielded cable and ground one end.
While the KT 70 remains an exceptionally reliable, high-performing Mode S unit, it is crucial to note that classic standalone Mode S units do not natively fulfill modern NextGen without secondary active data links. For aircraft owners seeking full compliance, manufacturers like BendixKing offer modern slide-in transponder upgrades (such as the KT 74) that utilize existing KT 70 trays and wiring harnesses to significantly cut labor down-time and panel modification costs.
Before pulling wires or cutting panels, the installer must ensure the aircraft's electrical and environmental environment matches the transponder's rated operating limits. Here is an overview of what you need
Because retrofitting, repairing, or inspecting an aircraft's transponder system requires exact technical compliance with aviation regulations, having a comprehensive understanding of the unit's installation blueprint is critical. Section 1: Technical Specifications & Equipment Overview
Place it at least 3 feet away from the ADF sense antenna, 6 feet away from the DME antenna, and clear of landing gear doors or exhaust paths.
The KT 70 is a technological step up from the KT 76 series, maintaining a similar physical footprint to allow for easier cockpit upgrades without extensive panel modification.
| User Type | Experience Level | Verdict | |-----------|----------------|---------| | Professional electrician/technician | High | Good – concise, technical, accurate | | Industrial maintenance engineer | Medium | Acceptable – needs careful reading | | DIY hobbyist / boater / car enthusiast | Low | Difficult – lacks basic “how to strip a wire” guidance | | Student learning instrumentation | Medium | Useful – but pair with instructor’s notes |
Shield all data lines to prevent radio frequency interference (RFI). 5. Antenna Installation