Rear Panel - microHAM microKEYER Manual

(1) – RADIO:
DB37F connector for radio connection – a detailed description is in Appendix A
(2) – RE/SS:
PA output mode switch for PA output.
RE - Relay contact
SS - Transistor collector
If the slide switch is in the SS position, the switching
transistor (open collector) is connected to the PAPTT
jack. The transistor can switch up to 48V/0.8A. This
position is appropriate for all modern Power Amplifiers
with electronic keying. Check the manual of your amplifier
to be sure the power requirements of the PTT circuit do
not exceed transistor rating. If the power requirements
exceed the transistor's capabilities, move the slide switch
to the RE position. This position connects the relay to the
PA PTT RCA. Maximum rating for the relay is: 48V
AC/DC @ 1A.
TIP: If you are not sure about keying requirements of your amplifier, use the RE position.
(3) - PA PTT:
PTT output for Power Amplifier. Output depends on RE/SS switch position.
RCA jack
TIP - Signal
SHELL - GND
(4) – REMOTE:
MiniDIN6 for PS/2 keyboard or PS/2 keypad.
(5) – USB:
USB B connector for computer connection. Connect a standard USB A-B cable.
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Rear Panel

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