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MF/HF marine radio

cmutai

May 21, 2023
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May 21, 2023
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What is the solution to a marine mf/hf radio when the ptt is press it warns that tjhe antenna unit not responding, please verify connection. Thank yo.
 

bertus

Moderator
Nov 8, 2019
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Nov 8, 2019
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Hello,

What is the make and model of the radio?
What does the manual tell you about the failure?

Bertus
 

danadak

Feb 19, 2021
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Feb 19, 2021
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What is the solution to a marine mf/hf radio when the ptt is press it warns that tjhe antenna unit not responding, please verify connection. Thank yo.

Good chance radio is seeing high SWR out of spec, something has changed on
antenna feed or driven element connections or cable short or....


Regards, Dana.
 

davenn

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Sep 5, 2009
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What is the solution to a marine mf/hf radio when the ptt is press it warns that tjhe antenna unit not responding, please verify connection. Thank yo.

Good chance radio is seeing high SWR out of spec, something has changed on
antenna feed or driven element connections or cable short or....


Regards, Dana.


exactly, probably going into a low poer TX or shutting down the TX completely so that it doesnt get damaged

So, @cmutai ... the solution is probably simple , check your antenna and coax feed for problems

You could also get a 50Ohm dummy load capable of the power output rating of the transmitter
and see if you still get a warning transmitting into a good load
 

kellys_eye

Jun 25, 2010
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Could be a 'comms' issue 'tween tx and ATU. Many manufaturers use a multi-core as well as the RF coaxial feed. The multi-core can be a full comms path (send/receive) or a simpler relay selection signal with VSWR 'error feedback'. This is why we need to know make/manufacture as there can be multiple reaons for an 'error'. Using Occams Razor I agree with the above though - probably something as simple as the antenna wire fallen off the coupler!
 
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