Interfaces for the widely-acclaimed 'Gold Star'
QSO-format G4WXL/G4UXD Supa-Tuta Morse Code (CW) Tuition (Trainer or Tutor)
software/program/programme, as recommended by RSGB Morse Examiners, plus
UK (GB) Morse test requirements for Radio Amateur (hams). Ideal for Koch
method lessons/use of Key.
Morse Tutor System for PCs
'QSO-Test-Format' Version 12.04
"Interface" to attach a "straight" key
No interface is needed - just a simple soldering job - full details supplied.
Interfaces to key an External Oscillator or Rig
#1 - "Cheap and Cheerful" interface
Use a diode-protected relay with mains-powered rigs
#2 - Sophisticated keying
This is suitable for high-speed keying. It is set up for the (usual) positive PTT line. If yours is negative, then reverse the output lines from the opto-coupler and disconnect the line to the transmitter/oscillator chassis, or use a relay.
If keying your rig involves switching a voltage greater than 12V then you must use a relay (with suitable diode protection against reverse-voltage transients) in place of PTT.
If in doubt use a relay. It is assumed that, as a Radio Amateur, you have the competence to wire things correctly. G4UXD can accept no responsibility for the use of these circuits.