DigiKeyer-2 external soundcard with CAT interface
http://www.microham.com/contents/media/dkii_new_knobs.jpg https://www.wimo.de/bilder/dkII_rear-l.jpg

More than just a soundcard interface - DigiKeyer-2

Significant differences to the predecessor microHam DigiKeyer:
- Winkey Chip for precise morse keying added
- Foot switch added
- Support for pseudo-FSK (fldigi) and OOK (Audio On/Off keying by cocoaModem)
- AF output for integration with the Micro-2R SO2R station controllers

The DigiKeyer-2 is much more than an interface, because it is an own, self contained soundcard. Together with the other integrated components like CAT interface and PTT/FSK/CW keyer this is a very versatile interface for all special modes. Use RTTY, Fax, SSTV, Echolink, PSK31, MFSK, Olivia, WSJT, APRS and many more, everything which is supported by a soundcard.

What is Pseudo-FSK/Pseudo-CW/OOK?

For 'real' FSK keying one would normally require a true UART chip in the computer (parallel to serial converter, COM-Port). With a virtual COM port such a device is simulated by the USB driver, but only with some problems. Depending on the load of the computer the timing of keying can vary (jitter) or be delayed (latency). This leads to not very clean telegraphy keying. With RTTY/FSK the characters might be illegible on the receiving side due to timing errors.

Now some multi mode programs (e.g. fldigi or cocoaModem (MacOs)) have found a good solution to this USB driver issue. Instead of toggling a handshake line of the virtual comport, an audio signal is sent (or not) to the right channel of the soundcard output. An additional hardware decoder within the interface detects the presence or absence of the tone and uses this information to key the FSK or CW line to the radio. With cocoaModem this mode is called OOK, Audio On/Off Keying

This leads to a much more precise timing with FSK and CW. Especially when using high speed telegraphy or QSK this is very beneficial. When using RTTY/FSK you can be sure that all characters are sent with the proper and consistent baudrate.

Of course the radio must support FSK keying to use this function with RTTY. When using AFSK this problem does not exist.

With the integration of a high-quality soundcard you have several advantages:

Of course all connections between radio and PC are electrically isolated to avoid noise loops. Between the DigiKeyer-2 interface and the PC just a standard USB cable is required. And also from interface to the radio it's only one cable, which usally connects to the rear connections of the radio. This greatly simplifies station setup.

https://www.wimo.de/bilder/dkII_blockdiagramm-m.jpgThe integrated CAT interface transmits frequency and other information between PC and radio, most manufacturers are supported: Icom, Kenwood, Yaesu, Elecraft, JRC, and TenTec. Depending on type a level conversion is done by the interface.

With just one cable between DigiKeyer-2 and radio all connections for CW, PTT and FSK keying are done. Further the interface offers two more time delayed PTT lines for power amplifier and pre-amp keying.

A connection on the rear side of the DigiKeyer-2 is used for a PS/2 keyboard (full or 10 Keypad, see below). With this keyboard pre-defined texts can be recalled for digital modes like RTTY and for CW.

A special AF output serves to connect to the Micro-2R SO2R station controller by microHam. This allows you to integrate the DigiKeyer-2 perfectly into your SO2R station.

The cable between DigiKeyer-2 and radio is individual to each radio model and must be ordered separately. We offer cables for most radio models. If the interface will be used on several radios, just order one cable for each radio.
Weight 1.1kg, Size 165 x 44 x 110mm.

Order No.
DK-2 microHam DigiKeyer-2 Soundcard Interface 260.00


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

Aansluitkabel voor de USB-2, USB-3, CW-Keyer en DigiKeyer2

DB15-IC-8: Icom IC-707, IC-725, IC-726, IC-728, IC-729, IC-735, IC-736, IC-737, IC-738, IC-746, IC-746Pro, IC-7400, IC-756, IC-756Pro (I+II+III), IC-761, IC-765, IC-775, IC-7600, IC-7700, IC-7800, IC-781, IC-910

DB15-IC-13: Icom IC-703, IC-706, IC-706mkII, IC-706mkIIG, IC-718, IC-7000, IC-7100, IC-7200, IC-7410, IC-9100

DB15-IC-7800: Icom IC-7800

DB15-EL-K3: Elecraft K3

DB15-TS-6: Kenwood TS-140, TS-440, TS-450, TS-680, TS-690,TS-711, TS-790, TS-811, TS-850, TS-940, TS-950, TS-140, TS-680(requires Kenwood IF-10C), TS-711, TS-811 ( requires Kenwood IF-10A), TS-940 (requires Kenwood IF-10B)

DB15-TS-9: Kenwood TS-570, TS-590S, TS-870, TS-2000

DB15-TS-990: Kenwood TS-990S

DB15-TSMINI6: Kenwood TS-480HX, TS-480SAT

DB15-FTMINI8: Yaesu FT-100, FT-817, FT-857, FT-897

DB15-FT-450: Yaesu FT-450

DB15-FT-736: Yaesu FT-736

DB15-FT-840: Yaesu FT-840

DB15-FT-847: Yaesu FT-847

DB15-FT-890: Yaesu FT-890, FT-900

DB15-FT-920: Yaesu FT-920

DB15-FT950: Yaesu FT-950, FTDX-1200, FTDX-3000

DB15-FT-9000: Yaesu FTDX-9000 serie

DB15-FT-1000M: Yaesu FT-1000MP, FT-1000MP MkV, FT-1000MP MkV Field, FT-2000, FT-2000D, FTDX-5000, FTDX-5000D, FTDX-5000MP

DB15-FT-1000D: Yaesu FT-1000D(requires ROM Version 6.0+)

Microham DB15-IC-8  
Microham DB15-IC-13
Microham DB15-IC-7800  
Microham DB15-EL-K3  
Microham DB15-TS-6  
Microham DB15-TS-9  
Microham DB15-TS-990  
Microham DB15-TSMINI6  
Microham DB15-FTMINI8 All cable's   72.00
Microham DB15-FT-450  
Microham DB15-FT-736  
Microham DB15-FT-840  
Microham DB15-FT-847  
Microham DB15-FT-890  
Microham DB15-FT-920  
Microham DB15-FT-950  
Microham DB15-FT-9000  
Microham DB15-FT-1000M  
Microham DB15-FT-1000D  


DigiKEYER List of cables and schematics
DB15-IC8 Icom IC-707, IC-725, IC-726, IC-728, IC-729, IC-735, IC-736, IC-737, IC-738
IC-746, IC-746Pro, IC-7400, IC-756, IC-756Pro, IC-756ProII, IC-756ProIII
IC-761, IC-765, IC-775, IC-7600, IC-7700, IC-781, IC-910
DB15-IC13 Icom IC-703, IC-706, IC-706mkII, IC-706mkIIG, IC-718, IC-78, IC-7000, IC-7200, IC-7410, IC-9100 Schematic
DB15-TS6 Kenwood TS-140, TS-440, TS-450, TS-680, TS-690
TS-711, TS-790, TS-811, TS-850, TS-940, TS-950
TS-140, TS-680 - benötigt Kenwood IF-10C
TS-711, TS-811 - benötigt Kenwood IF-10A
TS-940 - benötigt Kenwood IF-10B
DB15-TS9 Kenwood TS-570, TS-590S, TS-870, TS-2000 Schematic
DB15-TSMINI6 Kenwood TS-480HX, TS-480SAT Schematic
DB15-FT450 Yaesu FT-450 Schematic
DB15-FTMINI8 Yaesu FT-100, FT-817, FT-857, FT-897 Schematic
DB15-FT736 Yaesu FT-736 Schematic
DB15-FT847 Yaesu FT-847 Schematic
DB15-FT890 Yaesu FT-890, FT-900 Schematic
DB15-FT920 Yaesu FT-920 Schematic
DB15-FT950 Yaesu FT-950, FT-DX3000D, FT-DX1200 Schematic
DB15-FT1000M Yaesu FT-1000MP, FT-1000MP MkV, FT-1000MP MkV Field, FT-2000, FT-2000D, FTDX-5000, FTDX-5000D, FTDX-5000MP Schematic
DB15-FT1000D Yaesu FT-1000D (requires ROM Version 6.0 or higher) Schematic
DB15-FT9000 Yaesu FT-DX9000, all Versions


10er Tastatur

The 10 Keypad is directly connected to the microKEYER and allows control of various CW functions, like recall of stored standard buffers, adjusting speed and many more. The RTTY functions require a full PS/2 keyboard (a USB keyboard will not work!).

Order No.
MK-KEYPAD 10 keypad 25.40

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