Portable MW & LW
9 Transistor Radio
Transistors; AF117 Y159 AF117 OC70 OC75 OC81D OC81 AC127 2G309
Power supply; 9 volt, Ever Ready PP9
Dimensions mm; W=254, H=191,
See the KB WP31 "Calypso" in the Radio Museum
KB WP31 Service information
Notes; There are two models of the KB Calypso, the WP31 and the
WP31/L, this example is the earlier.
The visual differences between the WP31 and the WP31/L include, "
Luxembourg " marked boldly on the lower half of the dial, and 2 small
trimmer capacitors are mounted on the switch assembly.
The KB Calypso models share the same chassis as the corresponding KB
The KB service
manual states; The difference between the WP2I and WP21/L versions of these
models, are as follows:
On the /L versions, the microphone amplifier is permanently connected to the
input of the main amplifier and cannot be switched via the volume control by
pressing the M.W. and L.W. buttons together.
When the M.W. and L.W. buttons are pressed together on the /L versions,
giving Luxembourg bandspread, T2, Cl, C2, T3 and C10 are switched into
circuit, reducing the frequency range of the medium waveband circuitry.
2SG417 Y159 2G417 2G317B 2G374B 2G374B 2G381A 2G339A 2G309