Error: no such theme PatternSkinTheme

Repeater interface to TYT TH-9000 mobile radio

Radio-side connector

There is a connector on the TH-9000 circuit board with the signals necessary for repeater operation. The pinout is the same as the Jetstream JT-220:

Pin Function
1 Ground
2 Tx Audio
3 COS (Active Low)
4 Rx Audio
5 PTT (Active Low)
6 5V

(Source: http://www.slvrc.org/220band.htm)

A mating cable harness for the 1.5mm header is made by TE Connectivity (2058943-5, Digikey A100196-ND). The radio normally has no external connector for this header, but there is a DE-sized cutout on the back below the center heat sink protrusion. Because the COS output is active low and the NHRC-2.1 repeater controller requires an active high signal, a conversion circuit is required. The inverted signal can be connected to an unused pin on the DE-9 connector, making the complete external pinout:

Pin Function
1 Ground
2 Tx Audio
3 COS (Active Low)
4 Rx Audio
5 PTT (Active Low)
6 5V
7 COS (Active High)

NHRC-2.1 connector

Pin Function
1 Ground
2 CTCSS Decode
3 PTT (Active Low)
4 Tx Audio
5 Rx Audio
6 NC
7 CAS (Active High)
8 Ground
9 Fan

Interface Cable (Simplex)

This interface cable connects the radio to both sides of the controller, allowing simplex repeater mode.

TH-9000 Function NHRC-2.1
1 Ground 1
2 Tx Audio 4
4 Rx Audio 5
5 PTT 3
7 COS 7

-- StephenCavilia 27 Apr 2014

ProjectForm edit

Name TH-9000 Repeater Interface
Summary
Preview
Components
Difficulty Intermediate
Author
Topic revision: r1 - 27 Apr 2014, StephenCavilia
 

This site is powered by FoswikiCopyright © 2009-2018 StephenCavilia and contributing authors. This topic, TH9000Repeater is available under the Creative Commons Attribution-ShareAlike 3.0 license.
Ideas, requests, problems regarding CodenamePending? Send feedback