RoMac Automatic CW Identifier 2012 & Tuning Pulser  (CW I'der)
Version 6.0.0  Build Mar 24, 2023
Revision History & Problems here...

New in Version 5.8.8 is ability to send out an ID with via voice, using the Windows Text to Speech engine or a custom wave file.

Three ways to interface to your radio for Morse Code for identification.  
Through your present sound card and interface unit,  DTR pin on a serial port, connected to manual CW jack and via CAT commands (Elecraft, Kenwood and later model Yaesu)

Read reviews here... and  here...  (CW I'der before combining with Tuning Pulser)

Information / Downloads
Download (Free Evaluation Copy)
Purchase License Key
Sound Card Compatibility
Simple Interface to Transceiver
Revision History and Problem Reports
Manufacturers & Retailers of Sound Card Interfaces
MicroHam's MicroKeyer II Setup
Minimum System Requirements
Windows 7, Windows 8, Windows 10 (32 & 64 bit)
16 Bit SoundBlaster compatible sound card (See FAQ).


  • Adjustable CW speed 5 to 35 wpm
  • ID time interval 5 to 30 minutes
  • Six different options when to send the CW Identification, including a manual send.

  • Compatible with most commercially manufactured sound card interfaces. See FAQ for setup with the Rig Blaster Pro, Rig Blaster Plus, Rig Blaster Plug and Play, MFJ 1275, and MFJ 1279. (Limited features with some sound card interface units)

  • Support for Yaesu 101D, 450, 847, 897, 920, 950, 891,991,1000,1000MP,1200, 2000, 3000, 5000, and 9000.

  • Icom 7000,7100, 7200, 7300, 7410, 746, 746 Pro, 756 Pro, 756 Pro II, 756 Pro III, 7600, 7610, 7700,7800,7850, 9100, 9700.

  • Kenwood 480, 570, 590, 890, 990 and 2000

  • Elecraft and Flex radios.

  • Support for the new USB audio enabled radios,
    Icom 7100,7200,7300,7410,7600,7610,7850,9100 9700, Yaesu FT-991,3000 and Kenwood 590,890,990

  • Able to connect to HRD's IP server, so you can run HRD and it's suite of programs all at the same time. (HRD needs to have a TX button)

  • Built in controls for the sound card.
  • Selection of sound card independent of preferred sound devices.
  • Simple to interface to your present transceiver.
  • Build your own interface with easily obtainable parts.
  • Complete help file included.
  • Requires 16 bit SoundBlaster compatible  sound card (See FAQ).
  • Check for updated versions with a simple menu choice.






RoMac Software's Automatic CW Identifier and Tuning Pulser sends your callsign at programmed intervals, to ensure your stations compliance with FCC regulations. No more forgetting to ID.

The RoMac Automatic CW Identifier can either send out your call sign with Morse code through your sound card as audio, or it may be programmed to utilize the DTR signal line on a serial port and send out Morse code using the manual CW key jack on your radio.

The software is able utilize strictly CAT commands to generate the ID and Pulser signals. (Kenwood 480,590,990, and 2000. Yaesu models, FT-450,FT-950,FT-991,FT-1200,FT-2000, FT-3000,FT-5000, and FT-9000. Flex radios based on Power SDR2.x. and the Elecraft K3. (SmartSDR supports I'der, not pulser)

When using the DTR or CAT command methods, the software will key your radio, shift the frequency, change the mode to CW, send out your identification, and then restore the mode and frequency, all automatically.

The new USB audio capable radios, Icom 7200, 7300, 7410, 7600, 7610, 9100, Yaesu FT-991, FT-3000 and the Kenwood 590 only requires one USB cable between your computer and radio. What could be simpler!

For Flex Radio users, the software will enable the transmit VAC in your Flex Radio when sending out the ID, and then disable the VAC in the radio when done sending its ID, thereby re-enabling your microphone for VOX.

Whether you choose to use the audio option, or the serial port "DTR" option, connecting your radio is a snap. An audio interface can be as simple as an audio isolation transformer between the sound card in your computer, and a transmit audio input on an accessory jack. Selecting the DTR option, requires a simple one transistor and one resistor circuit, and a second serial port to send the ID to your radio.

The fully programmable serial port interface will work with most sound card interfaces or by utilizing CAT/CIV commands later model radio's.

If you are already using a CAT/CIV program such as Ham Radio Deluxe, the interface to your radio is almost complete. All that is needed is to interface your sound cards audio out, to a transmit audio input with an isolation transformer, or by utilizing a second serial port to key your radio in the CW mode via a manual key jack.

The RoMac CW Identifier 2012 also has the capability to connect the the Ham Radio Deluxe IP Server, to make connecting to your radio even simpler. You can have HRD running and the Automatic CW Identifier will share HRD's IP Server port with all your favorite HRD programs such as their logbook, or DM 780 program.

With the RoMac Automatic CW Identifier flexible and fully programmable interface, it will fit into almost any station setup.

The program is written with the latest .NET Framework 4.0 from Microsoft, ensuring trouble free operation and installation, and forward compatibility with Windows 8.

CW speed speed is fully adjustable from 5 to 35 wpm, ID time interval ranges from 5 to 30 minutes in one minute increments.

Choose from six different and convenient options of when to send you station identification, to match your operating style and tastes.

The Pulser aka "Pulse Tuner" sends a series of short audio tones or keys your manual CW jack rapidly,  enabling you to tune your amplifier or antenna tuner, without worrying about overheating those expensive amplifier tubes or antenna tuner parts.

The Tuning Pulser duty cycle is adjustable fro 1% to 100%.  The software can be programmed to send your ID after tuning with the Pulser.

Take your time, tuning your amplifier optimally using the RoMac Pulser. Considering the cost of replacing amplifier tubes, the RoMac Pulser is a bargain!

If you don't presently have a sound card interface a complete schematic for a basic yet fully functional interface is included here and in the help files. All parts are available at your local Radio Shack store.

The RoMac Pulser is compatible with all transmitters, from Icom, Kenwood, Yaesu, and others. Will work with any amplifier on the market today or any older amplifier.

The free evaluation software runs for 7.5 hours of cumulative running time.

Price is only  $24.95, which includes email and/or phone support, and licensing for two computers.