Specifications

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(15, 16) – iLINK (internal LINK)
Ports for connecting other microHAM devices (future expansion) to MK2R or MK2R+.
Connectors: Mini DIN6
(17) – ACC
Port for connecting external peripherals like 3
rd
party Band Decoders or custom built level
translators.
Connector: DB25 female
Pin description is in Appendix B.
(18) – PADDLE
Paddle input.
Connector: 6.3mm (1/4”) stereo
TIP – DIT Input RING – DAH Input SHELL – Ground
Note: The paddle sense can be reversed using Router or application settings.
(19) – RADIO2
Multi-pin jack for RADIO2 interconnection.
Connector: DB37 female
Detailed description is in Appendix A.
(20) – PTT IN 2
Status input for sensing the state of RADIO2. Connect to the PTT output of RADIO2.
Connector: RCA
TIP – Signal SHELL – Ground
Note: This connection is required to support VOX operation and PTT by software (CAT).
(21) – FS2
Foot switch 2 input (configurable function, by default keys RADIO2).
Connector: RCA, active when grounded.
TIP – Signal SHELL – Ground
(22) – PAPTT2
PTT output for Power Amplifier for RADIO2. Output (Solid
State or RElay contact) depends on RE/SS jumper position.
Connector: RCA, when active goes to ground.
TIP – Signal SHELL – Ground
If the jumper is in the SS position, the switching transistor
(open collector) is connected to the PAPTT2 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: 125VAC/2A or 60VDC/2A.
TIP: If you are not sure about the keying voltage of your amp or LNA, use the RE position.
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