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Start with identifying all the components and their position on the PCB.

Fit R1 and R2, soldering in position. Next insert IC1 making sure the IC is the correct way round, the notch on the IC must be the same way as the notch indicated on the PCB. Fit VR1, Cl and TR1, ensuring that the tab on TR1 aligns with the tab indicated on the PCB. Solder all components in position then trim off excess component leads.




Bend the three legs of the 22K potentiometer upwards and solder to the track side of the PCB.
Connect the negative (black) lead of the PP3 battery clip to the negative (-) on the PCB and then connect the positive lead (red) to the jack socket. From the wire supplied cut a 6” length, connect one end to the jack socket and the other to the positive (+) on the PCB.

Using the remaining wire supplied make the two connections between the PCB and the loud speaker.

After checking all components are correctly positioned and soldered connect a battery of between 4V and 12V to the battery clip and plug in your key. Finally check the volume control and adjust the tone preset to give the desired pitch.


R1 150 Ohms Brown Green Brown 1 PCB
R2 100K Brown Black Yellow 1 1/4" Jack Socket
C1 1nf Capacitor 1 1/4" Jack Plug
VR1 1M Ohm Preset 1 PP3 Battery Connector
VR2 22K Ohm Lin Potentiometer 1 Length of wire
IC1 4047B Cmos IC    
SP1 8 Ohm Speaker    
TR1 BFY51    

Price: £12.50 GBP + VAT in the UK and European Union
Shipping: UK 2.25 / European Union and Europe 3.50 / World wide 5.50

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Twin Paddle  l   Single Paddle   l  Hand Key  l   KT1 Key  l   Touch Twin Key   l   EK4 Keyer  l   Morse tutor  l   Vail key  l   Titanic Key  l  Morse Practice Oscillator

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