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Locked A really bad signal #reception
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Hi,
Just wanted to pass on a view of one of the worst FT8 signals I have ever seen. https://drive.proton.me/urls/0XZPXQ32D8#Wy1CscWnbrWT 73, Ron / W4MMP |
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D. Scott MacKenzie
I occasionally see the vertical lines at 60hz intervals - but only on 30M. There are plenty of really bad and wide signals - wiping out the entire segment.
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-----Original Message-----
From: main@WSJTX.groups.io <main@WSJTX.groups.io> On Behalf Of Ron / W4MMP via groups.io Sent: Tuesday, February 7, 2023 10:48 AM To: main@WSJTX.groups.io Subject: [WSJTX] A really bad signal #reception Hi, Just wanted to pass on a view of one of the worst FT8 signals I have ever seen. https://drive.proton.me/urls/0XZPXQ32D8#Wy1CscWnbrWT 73, Ron / W4MMP |
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Michael Black
I hope you contacted the operator.
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Mike W9MDB On Tuesday, February 7, 2023 at 09:47:41 AM CST, Ron / W4MMP via groups.io <w4mmp@...> wrote:
Hi, Just wanted to pass on a view of one of the worst FT8 signals I have ever seen. https://drive.proton.me/urls/0XZPXQ32D8#Wy1CscWnbrWT 73, Ron / W4MMP |
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Ah no unfortunately. I had just fired up the rig and did not have WSJT
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running at the time. 73, Ron / W4MMP On 2/7/2023 10:51, Michael Black via groups.io wrote:
I hope you contacted the operator. |
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Unless one knows how to manage and understand audio levels, I find frequently many connect the output signal from their computer to the MICROPHONE input of their radio. This method is very easy to overdrive the first stage of radio audio. In almost all designs, the MIC Level control is located in the circuit AFTER the first stage and no amount of MIC Level adjustment will resolve the issue.
My rule: If it is a microphone connect it to the MIC input. If it is NOT a microphone, DO NOT connect it to the MIC input. Thus one should find an AUX or Line Level input, usually on the back of the radio for feeding computer audio to the radio. 73 Bob, K4TAX |
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Hi,
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What confuses me is the width of the hash. It probably is not obvious in the video but the display width of spectrum (and waterfall) displays 72KHz. I did not turn up to see how far the hash extended. Most transceivers limit the output bandwidth to 3KHz (or so depending on the rig). Just now thinking about it, appears that the entire rig is being modulated with noise. Perhaps a faulty power supply? 73, Ron / W4MMP On 2/7/2023 12:35, Bob McGraw - K4TAX wrote:
Unless one knows how to manage and understand audio levels, I find frequently many connect the output signal from their computer to the MICROPHONE input of their radio. This method is very easy to overdrive the first stage of radio audio. In almost all designs, the MIC Level control is located in the circuit AFTER the first stage and no amount of MIC Level adjustment will resolve the issue. |
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That should have said "tune up" not turn up.
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73, Ron / W4MMP On 2/7/2023 12:50, Ron / W4MMP via groups.io wrote:
Hi, |
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