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General| Modulation | FM |
|---|---|
| Antenna Impedance | 50 Ohms |
| Type | Handheld |
| Receiver Sensitivity | 0.16 µV |
| Power Supply | Battery pack or external DC power |
| Frequency Range | 144-148 MHz (USA) |
Detailed technical specifications for the transceiver models regarding frequency, mode, and power.
List of included accessories with the transceiver package, such as antennas and battery cases.
Information on the NiCd battery pack, including charging requirements and initial use.
Procedure and guidelines for recharging the NiCd battery pack, including charge times.
Instructions for using optional alkaline or manganese batteries with the battery case.
How to install and remove the battery pack from the transceiver securely.
Explanation of the S meter's function as a relative battery voltage indicator during transmit.
Charts showing estimated operating time with different battery types and modes.
Overview of the transceiver's main operating controls and their functions.
Description of the LCD display and various indicators used on the transceiver.
Details on the function of specific switches like PTT, Monitor, and Lamp.
How to operate the transceiver's receiver functions, including tuning and frequency selection.
Guidelines and precautions for operating the transmitter, including antenna SWR.
Procedures for memory entry, recall, shift, lockout, and initialization.
How to perform band and memory scans with the transceiver.
Information on using the transceiver with repeaters, including offsets and tone.
How to use beep tones and the tone alert system for monitoring signals.
Features to conserve battery life and automatically shut down the transceiver.
Procedures to enable or disable Battery Saver and Auto Power Off functions.
General advice on transceiver maintenance and factory alignment procedures.
Guidelines for returning the transceiver for repair or service, including packing instructions.
A table listing common problems, their probable causes, and recommended actions.
A list and descriptions of optional accessories available for the transceiver.
Instructions for modifying the transceiver for expanded RF transmission range.
Specific modification for MARS/CAP operation on the TH-25AT model.
Modifications to enable transmission on frequencies outside standard ham bands.
Modification to disable the automatic power off feature on the transceiver.
Modifications to improve the tone alert function's reliability with the TSU-6.
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