[Elecraft] Using the KPA100 loudspeaker when the KPA100 is remoted

[Sverre Holm]

When the KPA100 power amplifier is external to the K2, the KPA100
loudspeaker is unused. I wanted to use it for other rigs that need a
loudspeaker. The minijack connection on the back of the KPA100 can be used
if its internal switch is shorted.

This can be done in a simple way by mounting a male connector and plug in
the unterminated "AF In" connector (J5). The lower pin on the male connector
is soldered to the warm speaker cable. See middle right in the image on
http://www.qslnet.de/member/la3za/KPA100_loudspeaker.html

If the KPA100 is mounted in the K2, J5 is plugged into the K2 main board,
and when it is used stand alone, J5 may be plugged into the new connector.
In this way the KPA100 loudspeaker connection is compatible with the
original design when mounted in the K2 and its loudspeaker can be used for
other rigs when the KPA100 is separate from the K2.

73

Sverre
LA3ZA
http://www.qslnet.de/la3za/