microHAM USB CAT/Audio Interface II

The USB-II interface by microHAM is a USB interface for CAT and soundcard AF. This interface offers the usual level converters for nearly all CAT interfaces, electrically isolated lines for PTT and CW keying, an input for a squelch signal and electrically isolated audio interfaces. This makes this device ideally suited for all users who wants to run digital modes from the soundcard.

The microHAM USB-II device works with all comouters with USB interface, drivers are available for Windows 98SE/ME/2000/XP/Vista/Windows 7 32/64-Bit, Apple Macintosh OS8/OS9/OS-X and Linux (with limitations, only from Kernel 2.6.17.8 on). MS-DOS is not supported. Windows 7 64-Bit is supported since version 7.6.1.

Unlike common computer mass market "USB to Serial adapters" our USB Interfaces are carefully designed for maximum immunity from strong RFI and at the same time be "RF quiet". Each data line is low pass filtered for minimum interference. The only known product of USB chipset clock is a beat at 144.030MHz.

• No COM or LPT port necessary, just one USB port and sound card
• Complete "Computer <-> Radio" electrical isolation
• Integrated computer control port for all radios CI-V, FIF-232, IF-232, RS-232
• Squelch input for signaling to computer
• No external power adapter required
• Strong RFI immunity
• Quick change connectors
• Drivers for all version of Windows, incl. Windows Vista® and Win7 32/64 Bit.
• LEDs for easy visual feedback of CAT, CW, PTT, SQL
• Metal/Aluminum case, powder coated and silk screened
• Free, time unlimited firmware/software upgrades via internet

• USB: USB 2.0 Full speed , USB 1.1 compatible
• CAT RXD, TXD, max. 57600 Bd
• CW: open collector, driven from DTR, max 30V/400mA
• PTT: open collector, driven from RTS, max 30V/400mA
• FSK: open collector, driven from DTR (requires EXTFSK from MMTTY)
• SQL input: close to ground or high (two inputs) to activate. Wired to CTS
• Size: 100mm x 25mm x 80mm (BxHxT)
• Weight: 220 gr (without cables)

• USB-Interface II
• CD-ROM with driver software, manual
• USB cable (A/B)
• Two audio cables for soundcard

Important: Cable to radio needs to be ordered separately!

DB15-IC8 DB15-IC13 DB15-TS6 DB15-TS9 DB15-TSMINI6 DB15-FT450 DB15-FTMINI8 DB15-FT736 DB15-FT847 DB15-FT890 DB15-FT920 DB15-FT950 DB15-FT990 DB15-FT1000M DB15-FT1000D DB15-TT-OM DB15-EL-K2

List of cables for microHAM "digiKEYER", "USB-2" and "USB-III" interfaces

DigiKEYER List of cables and schematics

Other cables for Elecraft, TenTec etc. on request.