Microham Micro Keyer 3 the most powerful single radio All-In-One USB interface
SKU Part Number: MHAM-MICROKEYER3
Screens are currently yellow - blue screen option available from December 2021 onwards. A low cost, high performance USB interface that provides...
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Special Price £420.00 £350.00 Regular Price £449.99
Availability: In stock
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Screens are currently yellow - blue screen option available from December 2021 onwards. 

A low cost, high performance USB interface that provides high quality build-in sound card for digital modes, with optically isolated transceiver CAT control, CW and PTT. These USB Interfaces provide a solution to the lack of available Serial (COM) ports on laptop and newer desktop computers for controlling your radio. The USB interface III includes full optical isolation of all control signals (radio control, CW, PTT and Squelch) and built-in USB sound card with front panel level controls for transmit via your transceiver's Accessory audio input and the constant level (pre-volume control) audio output. microHAM USB Interfaces have built-in hardware support for your radio - you no longer need additional level converters like CT-62, IF-232, FIF-232, CT-17. USB Interface III includes support for CW keying (DTR) and PTT (RTS) as well as a detector/driver for pseudo-FSK and QSK CW on the soundcard's right audio channel for use with FLDIGI on any platform. USB Interface III uses same cable as USB Interface II or DIGI KEYER.


Features:

Just one USB port for audio and Control  
   • Complete "Computer Radio" electrical isolation
- bidirectional transformer isolation between sound card and radio
ALL digital signals: Radio Control, CW, PTT, FSK, and Squelch, 
        optically isolated from USB port
   • Standard Sound Device - no custom drivers: 
The USB Sound Device is an industry standard device recognized by 
Windows XP and Vista (all versions), Macintosh OS 10 and LINUX. There are no custom device drivers to install and no compatibility problems with your applications. Windows 98SE is not supported.
   • Ultra low noise: 
- The sound circuits are designed with special attention to low noise 
Receive noise floor is better than -90 dBm (typical) in 600 Ohms. 
- 87 dB (typical) dynamic range rivals that of professional products.
- Special circuit design maintains full dynamic range and low noise floor 
  with all radios - both high level and low level outputs.  
   • Independent transmit and receive clock   
- Transmit clock: 32000, 44100, 48000 Hz 
- Receive clock: 8000, 11025, 16000, 22050, 32000, 44100, 48000 Hz
- sampling rates are native: no up/down conversion or "rounding" errors
   • Right channel audio detector and FSK/CW driver    
FSK output for FDIGI "pseudo-FSK" mode  
Provides a "hard keyed" CW output for software that generates 
  only audio (sidetone) CW
   •

Support for all radio control standards (CI-V, FIF-232, IF-232, RS-232)
- fully supports Icom, Kenwood, Ten Tec, Yaesu and other radios
- no separate level converter required
- based on FTDI chip

   • Squelch input for signaling to computer
- two inputs, one is active low, second is active high 
- ideal for Echolink and remote interfacing applications 
   • No external power adapter for most transceivers
- Computer part is powered from USB
- Radio interface is powered from transceiver or transceiver power supply
   • Strong immunity to RFI 
- integrated chokes and filters for best RFI immunity
- advanced shielding and circuit design for RFI product suppression
   • Quick change connectors
- USB 
- Radio - DB15
   • LEDs for easy visual feedback of CAT, CW, PTT, SQL
   • Metal/Aluminum case, powder coated and silk screened
   • Free software upgrades via the Internet


Specifications:


Just one USB port for audio and Control  
   • Complete "Computer Radio" electrical isolation
- bidirectional transformer isolation between sound card and radio
ALL digital signals: Radio Control, CW, PTT, FSK, and Squelch, 
        optically isolated from USB port
   • Standard Sound Device - no custom drivers: 
The USB Sound Device is an industry standard device recognized by 
Windows XP and Vista (all versions), Macintosh OS 10 and LINUX. There are no custom device drivers to install and no compatibility problems with your applications. Windows 98SE is not supported.
   • Ultra low noise: 
- The sound circuits are designed with special attention to low noise 
Receive noise floor is better than -90 dBm (typical) in 600 Ohms. 
- 87 dB (typical) dynamic range rivals that of professional products.
- Special circuit design maintains full dynamic range and low noise floor 
  with all radios - both high level and low level outputs.  
   • Independent transmit and receive clock   
- Transmit clock: 32000, 44100, 48000 Hz 
- Receive clock: 8000, 11025, 16000, 22050, 32000, 44100, 48000 Hz
- sampling rates are native: no up/down conversion or "rounding" errors
   • Right channel audio detector and FSK/CW driver    
FSK output for FDIGI "pseudo-FSK" mode  
Provides a "hard keyed" CW output for software that generates 
  only audio (sidetone) CW
   •

Support for all radio control standards (CI-V, FIF-232, IF-232, RS-232)
- fully supports Icom, Kenwood, Ten Tec, Yaesu and other radios
- no separate level converter required
- based on FTDI chip

   • Squelch input for signaling to computer
- two inputs, one is active low, second is active high 
- ideal for Echolink and remote interfacing applications 
   • No external power adapter for most transceivers
- Computer part is powered from USB
- Radio interface is powered from transceiver or transceiver power supply
   • Strong immunity to RFI 
- integrated chokes and filters for best RFI immunity
- advanced shielding and circuit design for RFI product suppression
   • Quick change connectors
- USB 
- Radio - DB15
   • LEDs for easy visual feedback of CAT, CW, PTT, SQL
   • Metal/Aluminum case, powder coated and silk screened
   • Free software upgrades via the Internet




Specifications:

Power Consumption: USB < 200mA, Transceiver, < 100mA @ 13.8V. 
 
Radio Port: RxD, TxD – max. 57600 Baud, RTS/CTS handshake supported

Levels: FIF-232, IF-232, CI-V, RS-232

Levels: jumper selectable TTL, inverted TTL, open collector bus or RS-232
 
CW: open collector, driven from DTR or audio detector, max 30V/400mA
 
PTT: open collector, driven from RTS, max 30V/400mA
 
FSK: open collector, driven from DTR (MMTTY with EXTFSK) or 
       audio detector (FLDIGI/pseudo-FSK)
 
SQL: input, closed to ground or high (two inputs) to activate. Wired to CTS
 
Audio Out (left): 
     Output Level: 1.3V p-p max. 
     Response:  100 Hz - 10 KHz +1dB/-3dB 
     Second Harmonic:  -80 dB (typical) 
     Third Harmonic:  -70 dB (typical) 
     D/A Sample rates: 32000, 44100, 48000 Hz 
 
Audio Out (right): 
     Internal Pseudo-FSK/QSK CW detector.
     drives CW and FSK outputs
 
Audio In (left): 
     Input Level: 4V p-p max. 
     Response:  300 Hz - 3 KHz +/- .5 dB (typical) 
     Absolute Noise Floor:  -90 dB @ 600 Ohms  
     Dynamic Range:  87 dB (typical) 
     D/A Sample rates: 8000, 11025, 16000, 22050, 32000, 44100, 48000 Hz 
 
Dimensions:  W 232mm (9.125") x H 44mm (1.73") x D 105mm (4.125")
 
Weight: 1.3 kg (2.875 lbs.)
 
Under Microsoft Windows, the microHAM USB Device Router can create/map the USB III to separate virtual serial ports for control, CW, and PTT.  With OS X and LINUX the control, software CW and PTT outputs are provided as a single TTY device using native FTDI drivers for that operating system.  The USB sound card uses OS native USB Audio Class drivers built-in OS.
 
Requirements:
 
Minimum - 800 MHz IBM PC compatible computer with Windows 2000, 64 MB RAM, CD-ROM, USB1.1 port, Transceiver, logger or control software (any) 
 
Recommended - 1.6 GHz PC with Windows XP or higher, 256MB RAM, CD-ROM, USB2.0 port, Transceiver with computer port, logger or control software (any)
Also Supported - Apple G4 or later with OS X 10.4 or later and current LINUX distributions. 

Note:  Windows 98 (any version) is not supported. 

Shipping:

We have several shipping options for our products, including next-day and Saturday/Sunday delivery for certain items. Please see these options at checkout.

Returns:

If you have any equipment that needs to be returned to Martin Lynch & Sons, please fill out the form below:

Click here for returns form

Upon receipt of goods you have 14 days to return goods however the goods must be returned in original packaging and care must have been taken with the goods you wish to return. Under distance selling regulations you are not entitled to any refund on carriage charges or modification charges made at your request.

Warranty Terms and Conditions

Outside of the 14 faulty return period, returned items cannot be accepted, unless covered by manufacturer's warranty. We will repair as much as possible on site however in exceptional circumstances products may have to be returned to the manufacturer of distributor.

For repairs/replacements under manufacturer’s warranty for any item please download a ML&S return form from the link above and return to ML&S with the faulty product.

International Warranty information

Warranty service for items we sell is available in the U.K. only, unless otherwise noted. It is your responsibility to pay freight for returned items to the U.K. and back to you for desired warranty coverage. All of our NEW products come with a minimum 12 month warranty, (Yaesu & Icom 24 months), with up to 90 days on second-hand equipment. Items returned for service must state "returned goods for repair" on the return air waybill or U.K. import customs duties apply and will be added to your invoice. For more info about returning items please contact our customer help desk, [email protected]