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10. PA PTT
PTT output for Power Amplifier.
Output (Solid State or RElay contact) depends on RE/SS
jumper position.
Connector: RCA, when active goes to ground.
TIP – Signal
If the jumper is in the SS position, the switching transistor
(open collector) is connected to the PA PTT jack. The
transistor can switch up to 45V/0.8A. This position is
appropriate for modern Power Amplifiers with electronic
keying. Check the manual of your amplifier to be sure
the power requirements do not exceed the transistor
rating. If the requirements exceed transistor rating set
the jumper to the RE position - this position connects the
relay contact to the output jack. Maximum rating for the
relay is: 48V AC/DC @ 1A.
TIP: If you are not sure about the keying voltage of your Power
Amplifier or LNA, use the RE position.
TIP: the RE/SS jumpers are located on the edge of the circuit board
in front of the PA PTT and LNA PTT jacks.
11. GND
Terminal for connection to station ground.
12. SUB RX
Audio input from transceiver (second receiver - right channel).
Connector: 3.5mm
13. POWER
Power Switch
14. PADDLE
6.3mm (1/4") stereo female for paddle input.
TIP - DIT RING - DAH SLEEVE – GND
NOTE: The paddle sense can be reversed using Router settings
15. PS/2
MiniDIN6 for PS/2 keyboard or PS/2 keypad.
16. FOOTSW
RCA foot switch input. Active when closed to ground.
TIP - Signal SHELL – GND
17. LNA PTT
PTT output for controlling Low Noise Preamplifier or Receive antenna switching.
RCA jack TIP - Signal SHELL - GND
See: 10 – PA PTT
microHAM © 2008 All rights reserved
SHELL – Ground
TIP - Audio RING – no connection SLEEVE – Ground
7
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