Kenwood 50 MHZ ALL MODE TRANSCEIVER TS-590S - Manual (Page 49)

5 SOFTWARE: ENHANCING OPERATING PLEASURE
TS-590S CONTENTS 43
Though only two PF keys are available on the transceiver, it is possible to increase the number of the
PF keys by using a switch to switch a voltage derived from the microphone connector.
If you have a microphone equipped with the PF keys such as MC-47 (although it was discontinued
and no longer available), you can assign the PF function to the PF key and the UP and DOWN keys.
Likewise, by adding an external circuit as shown below, the PF function also can be assigned.
Figure 5-6 Example of Circuit
Caution:

The figure shows the microphone connector viewed from the front panel, but it is inverted (upside down).
 The circuit only shows the connection of DC signals. Be fully aware of loop interference of radio frequency signals and other
possible issues that may arise.
 We will not accept any request for fixing problems arising from connecting devices other than Kenwood’s genuine optional
products regardless of the content of this document.
Hints and Tips “Extension of PF function”
1
2
3
4
5
6
7
8
PF2 PF1 UP
PF4 PF3 DOWN
MIC CN
100 k
22 k
100 k
22 k