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(26) – PAPTT1
PTT output for Power Amplifier for RADIO1.
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 PAPTT1 jack.
The transistor can switch up to 45V/0.8A. This position is appropriate for modern amplifiers with electronic
keying. Check the manual of your amplifier to be sure the PTT 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/DV 1A.
(27) – LNA1
Sequenced keying (bypass) for Low Noise Amplifier or receive antenna control on RADIO1.
Output (Solid State or RElay contact) depends on RE/SS jumper position.
Connector: RCA, when active goes to ground.
TIP – Signal
SHELL – Ground
The output circuit is the same as shown for PAPTT2.
(28) – DC 12V
Power input.
Connector: 2.1/5.5mm coaxial
CENTRAL – Positive pole
SHELL – Negative pole (Ground)
IMPORTANT WARNING: Be sure to observe the proper polarity!
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