Roberts Radio R876 - Manual (Page 61)

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Portable shortwave aerial
MW step size switch
1. This switch located inside the battery compartment
provides a means of changing the MW step size from
9kHz to 10kHz. In Europe and most other parts of the
world set the switch to the 9kHz position. For the USA
and Canada set the switch to the 10kHz position.
1. Pull out the jack plug from the aerial reel and plug into
the socket marked "AM EXT. ANT" located on the left
side of the radio. Uncoil the aerial to a convenient length
and attach the reel clip to a suitable support point.