Keys & Paddles

This is an old fashioned Straight key made of hard wood. It`s operation is exact and its axle is encased in ball-bearings. The contacts are made of silver alloy. Its knob has the optimal shape and regular brass screws have Whitworth threading.

The Microswitch key. The good qualities of the microswitch are used and so the contact and easy operation are ensured. A transformer metal-plate was used as a springy element. The power push-button is used as a knob. Because of its small size, this key can be used with the portable QRPP transmitter. The total length is 58 mm.

The Jambic paddle has a massive copper plate to provide good stability. The main paddle board is fastened to the column on the far side. The brass levers are lighter due to the holes drilled in them. The cable is removable and is finished with a three-pole connector jack 3,5mm. The handle allows for easy transmission.

The Microswitch paddle. In the middle of the main board there are two microswitches that are glued together. One has its press-pin turned to the right, and the other to the left. Backstops have been attached near the pins to limit their lift. The springy iron-tins have been formed into a U shape and are pressed against the microswitch with adjustable screws. This ensures their minimal lift.

The Sensor paddle has two small sensor plates and two FET-op-amps. The schematics come from the G3YCC.