RS232/USB 1200 Baud Modem: Project Details & Kits

Hamcom Radio Interface: Project & Kits

1200 Baud External Power Modem - Project Details Only

Member Messages on this Project

For many radio amateurs, talking or chit-chatting on-the-air is of no interest. They prefer to "Silently" work on their bench with hobby projects & communicate with fellow amateur by way of a PC and a modem connected to their wireless sets.

There are lots of ideas and many brands of radio modems available to fill this requirements. Buying a ready made modem & making one for own use, makes a lots of difference to many. This design is an attempt to build a quality modem for 1200 Baud VHF digital work.

Hamcom is another such interface giving us ability to connect on HF & VHF with RTTY, CW & other modes. 

Complete technical details & schematic are given here for download 

           

Project Details

This Baycom compatible Modem uses a MX614 1200 baud Bell 202 modem chip as detailed on previous project. Modem takes its power from RS232 COM port and has provision to use an USB chip from FTDI to use on USB with FTDI drivers.

A Double Sided PTH PCB measuring 10cm X 5cm is available for those who wish to build this modem using their own parts.

Project Details & Buy Kits on-line