Andy's Amateur Radio Circuit Diagrams

Andy's Amateur Radio Circuit Diagrams

Select Radio then right click on required circuit and click on Save Target As
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ADI

For 130 to 175MHz Coverage
Hold FUNCTION 3 when turning radio on

ADI AT-200 Instruction Manual

ADI AT-200 Block Diagram
ADI AT-200 Main Circuit Diagram
ADI AT-200 CPU Circuit Diagram
ADI AT-200 DTMF Circuit Diagram
ADI AT-200 CTCSS Circuit Diagram

For 400 to 475MHz Coverage
Hold FUNCTION 3 when turning radio on

ADI AT-400 Block Diagram
ADI AT-400 Main Circuit Diagram
ADI AT-400 CPU Circuit Diagram
ADI AT-400 DTMF Circuit Diagram
ADI AT-400 CTCSS Circuit Diagram

AOR

AR-1500 Main Circuit Diagram
AR-1500 CPU Circuit Diagram
AR-1500 Keypad Circuit Diagram

AOR AR-1500EX 500KHz to 1.3GHz Scanner Mods

Dymar

Dymar 880 Circuit Diagram

Hora
Hora C-408

Hora C-408 Instruction Manual
Hora C-408 UHF Handheld 230mW
Modification to Extend Range to 420MHz - 480MHz
Turn radio off and remove batteries.
Now take screws out of radio 2 at top and 1 in battery compartment.
Now locate the surface mount diode marked with the letter ( I )
it is to the bottom right corner of the heat sink See Photograph.
Caerfully remove the diode marked ( I ).
Screw all covers back on radio
Look for the reset button in the battery compartment
Now press to reset radio..

Icom