RI-1 Radio Interface
USB to Radio AllStar Interface
RI-1 Description:
The RI-1 is a radio interface board designed to be used with the AllStar Link or Ham-VOIP systems.
The RI-1 board is an excellent way of getting a low cost, professional looking interface, with options. This board is designed to be used with several modified FOB’s that are currently on the market. The main FOB the RI-1 board is designed for is the SANWU Free Drive USB sound card. This is one of the cheapest non-potted FOB currently for sale. This FOB is easy to modify for use with the RI-1. The radio connection is through a DB-9 Female for ease of connection with commonly found parts.
The RI-1 has an onboard audio amplifier to drive those hard to modulate radios such as the Yeasu DR-1X. The audio amplification is adjusted by increasing the voltage from between 5v – 12v depending on how much amplification you need. Most setups do not require more than the 5v the USB power provides to get the required drive.
The RI-1 board also has 4 open holes in this board that are connected to pins 1, 4, 7, and 9 on the DB9 radio connector. Pins 1, 4, and 7 are for any use the end user may have to connect into the radio. Pin 9 may also be used for any input you desire but optionally it is designed for powering the audio amplifier from the radio connector itself via JP2 & JP1 settings.
Use of cabling with ferrite beads installed is recommended to help eliminate any possible interference.