Roger Beep - kit contents and construction notes

This article lists the contents of the Roger Beep kit and contains notes and information for constructors.

Table 1 is a list of parts that are supplied in the kit.

Notes:

1.  R4 and R5 must be selected to suit the particular transceiver, the values supplied may suit some transceivers but suitability needs to be checked by the constructor.
2. R6 is a wire link supplied by the constructor, the resistor position on the PCB is provided for constructors who wish to use a bipolar transistor for Q1.
3. The kit does not include header plugs or sockets, IC socket,  heatshrink tube, wire or solder.
4. Some potentiometers may need the legs bent to line up with the PCB holes.

Fig 1: Circuit diagram

Fig 1 shows the RB circuit diagram.

Table 2 shows the usage of pins on JP1. Most constructors will wire directly to the PCB, but for those who wish to use a connector, a normal 6 pin polarised header plug, or 90° version of same can be installed on the board.

Note that PTTin is for connection of a PTT switch that provides a contact closure to ground to transmit. Check your connections carefully and DO NOT ATTEMPT TO USE IT IN ANY OTHER WAY.

Fig 2: Parts overlay

Fig 2 is a view of the parts overlay. The cathode (ie the stripe) of D1 goes to the left.

Fig 3: Example RB using an optional connector

Fig 3 is a view of the component side of a board using an optional 90° 6 pin polarised header. The chip was socketed in this case because this RB is used to test program code. Constructors could optionally install a socket to facilitate chip upgrade. R6 on this board has a 1k0 resistor installed, constructors would normally use a wire link, and R5 on this board is 4.7K to suit the transceiver.

Shielded wire should be used from JP1 pins 5 and 6 for the audio connection.

Changes

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