Photo 3 – W3YY Interface with components installed His boards are available for purchase in kit or assembled/tested form at a reasonable cost. Bob, W3YY, has produced a very nice high-quality circuit board using opto-isolators. Opto-isolators can also be used instead of transistors. These radios require either a PNP transistor or straight through keying circuit.
#N1mm logger with signalink series#
Some radios, such as the Ten-Tec Omni Series and Kenwood TS-930, do not have the capability of changing FSK polarity. If you find your FSK transmit signal is inverted, you can normally change the polarity from a menu option in your transceiver. These simple transistor interfaces will work for most radios that are capable of transmitting FSK. Diagram 2 – Simple FSK, PTT & CW transistor circuits. The 2N3904 transistor works fine too. The resistor value can be just about anything from 500 to 2k ohm or possibly lower or higher. The transistors can be just about any general purpose NPN transistor.
#N1mm logger with signalink serial#
These circuits are connected to the same DB9 connector which allows all three circuits to be controlled by the same serial port (DB9 pin-out shown here). These are the exact circuits I (AA5AU) use for FSK, PTT and CW keying. If you are handy with a soldering iron, you can build your own simple transistor interface. Photo 1 – Mortty is a CW/RTTY interface designed by N8AR & K8UT. Information on interfacing Tinyfsk & Mortty with MMTTY here. For more information, see the Mortty website here. Mortty connects to your computer’s USB port and provides outputs for FSK/CW and PTT. You can buy the kit and build the interface. Mortty is a kit created by Steve Smith, N8AR, and Larry Gauthier, K8UT, that utilizes TinyFSK. TinyFSK is an ingenious FSK interface created by Andrew Flowers, K0SM, utilizing Arduino or Arduino-compatible boards and supported by major logging programs like WriteLog, N1MM, and DXLabs. RFSpace SDR-IQ)Ĭheck out the web page here.
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