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Topic: No Audio (Read 1807 times)
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WD8BXS
alter Hase
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Posts: 286
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No Audio
« on: 06. March 2018, 02:15:14 »
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I am using an mchf RF board, and I have no audio, I see nowhere on the JP1 for 12 volts to the audio amp.
How do I get 12 volts to the audio amp please?
I also see NO signals!!
The rf board works fine with the mchf UI Board
Any More ideas??
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Thanks,
De WD8BXS vy 73
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WD8BXS
alter Hase
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Posts: 286
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Re:No Audio
« Reply #1 on: 06. March 2018, 02:39:17 »
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I discovered that I DO have audio at J1, but not very loud.
And I am receiving!
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Thanks,
De WD8BXS vy 73
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DB4PLE
positron
Urgestein
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Posts: 1278
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Re:No Audio
« Reply #2 on: 06. March 2018, 06:55:10 »
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Hi,
yes, the 12V are not easily accessible on the mcHF RF board via a pin header. You will need to solder a cable. You can use a Dupont cable with a female end (cutoff other end), and solder an 1 pin angled header on the UI board. It is not ideal but at least you can easily disconnect things and use the same RF board with the mcHF UI with risking a short.
73
Danilo
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peter_77
Urgestein
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Posts: 735
THE mcHF and UHSDR forum !
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Re:No Audio
« Reply #3 on: 06. March 2018, 10:23:22 »
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Or just use only the LINE OUT audio connector for testing (no need to supply the audio PA with 12V) and adjust the line out audio level in the setup to max before.
Otherwise the larger PCB track around the loudspeaker cutout between 10 and 12 o'clock on the mcHF RF board has 12V.
You can track this PCB track down to one of the components for soldering or solder a wire directly onto the track for the 12V supply of the audio PA section. The wire leads through thls hole to the RF board underneath.
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| « Last Edit: 06. March 2018, 10:35:44 by peter_77 » |
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WD8BXS
alter Hase
Offline
Posts: 286
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Re:No Audio
« Reply #4 on: 06. March 2018, 13:32:48 »
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Thanks, I will check it out, I am using a V6 RF board.
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Thanks,
De WD8BXS vy 73
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