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Hi,
?
today I made following test with 2 Surface pro3 with following configirations:
1. win11 with wsjt-x installed manual
2. Linux mint with linix73 installed Hammonds 4.5 and wsjt-x
?
both installations running with xiegu x6100 unun 1:9 and 7m wire, usbc cable with 2 ferrits Running with 8watts
?
the Linux pc always gehts problems when transmitting. WSJT always looses Connection to x6100.
the Win11 PC runs smoothly without and Problems.
?
how can this happen with exactly the same hw for both Tests?
?
vy 73 de Klaus, DC2JR?
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Interesting question, this sounds like RFI (obviously), and the only stated differences are the physical computers (two different computers of same model/design) and the OS (Linux or win)...
I suspect the issue has to do with the location of each computer in relation to feedline/transmitter... that's about the best I can do based on the supplied info.
Your random wire antenna w/ 9:1 balun is using the coax as part of the antenna system, so you have your computer right next to the actual antenna. A difference of inches between your transmitter/coax and computer could make the difference.
Have you considered adding a choke balun (1:1) away from the radio to keep RF away from the computers?
I'm interested to see what we learn from this...
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On Aug 1, 2024, at 07:02, dc2jr via groups.io <k.j.raske@...> wrote:
? Hi,
?
today I made following test with 2 Surface pro3 with following configirations:
1. win11 with wsjt-x installed manual
2. Linux mint with linix73 installed Hammonds 4.5 and wsjt-x
?
both installations running with xiegu x6100 unun 1:9 and 7m wire, usbc cable with 2 ferrits Running with 8watts
?
the Linux pc always gehts problems when transmitting. WSJT always looses Connection to x6100.
the Win11 PC runs smoothly without and Problems.
?
how can this happen with exactly the same hw for both Tests?
?
vy 73 de Klaus, DC2JR?
|
Sounds interesting, I also think, it is RFI. Both computers stand at the same Place, about 49cm right of the xiegu and all devices (pc and xiegu) run on internal battery
vy 73 de Klaus, DC2JR Von meinem iPhone gesendet
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Am 01.08.2024 um 16:00 schrieb Ken N2VIP via groups.io <ken@...>:
? Interesting question, this sounds like RFI (obviously), and the only stated differences are the physical computers (two different computers of same model/design) and the OS (Linux or win)...
I suspect the issue has to do with the location of each computer in relation to feedline/transmitter... that's about the best I can do based on the supplied info.
Your random wire antenna w/ 9:1 balun is using the coax as part of the antenna system, so you have your computer right next to the actual antenna. A difference of inches between your transmitter/coax and computer could make the difference.
Have you considered adding a choke balun (1:1) away from the radio to keep RF away from the computers?
I'm interested to see what we learn from this... Ken, N2VIP On Aug 1, 2024, at 07:02, dc2jr via groups.io <k.j.raske@...> wrote:
? Hi,
?
today I made following test with 2 Surface pro3 with following configirations:
1. win11 with wsjt-x installed manual
2. Linux mint with linix73 installed Hammonds 4.5 and wsjt-x
?
both installations running with xiegu x6100 unun 1:9 and 7m wire, usbc cable with 2 ferrits Running with 8watts
?
the Linux pc always gehts problems when transmitting. WSJT always looses Connection to x6100.
the Win11 PC runs smoothly without and Problems.
?
how can this happen with exactly the same hw for both Tests?
?
vy 73 de Klaus, DC2JR?
|
The question is, hey is the Linux pc more sensitiv against rfi than the win pc, as Both are physically the same machines
?
Vy 73 de Klaus, DC2JR?
?
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I'm also thinking it sounds like RFI. It's working but fails. Both computers are not the same, regardless of the OS. Circuitry design, RF noise, parts used? internally being different from different vendors, etc. Even the same make and model can act differently. I once had a computer randomly reboot, changed out the power supply and the motherboard. Turned out the surge protector's MOV was bad. Had another one that kept having a screen go blank, turns out the keyboard had a bad ground and was picking up static. Troubleshooting sure can be fun ?
?
Greg
KE5DXA?
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Well, These Are 2 identical Surface pro3, both Running on battery, so the rfi effect should be identical
vy 73 de Klaus, DC2JR Von meinem iPhone gesendet
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Am 02.08.2024 um 20:39 schrieb Greg Sanders via groups.io <KE5DXA@...>:
? I'm also thinking it sounds like RFI. It's working but fails. Both computers are not the same, regardless of the OS. Circuitry design, RF noise, parts used? internally being different from different vendors, etc. Even the same make and model can act differently. I once had a computer randomly reboot, changed out the power supply and the motherboard. Turned out the surge protector's MOV was bad. Had another one that kept having a screen go blank, turns out the keyboard had a bad ground and was picking up static. Troubleshooting sure can be fun ?
?
Greg
KE5DXA?
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The point about subtle differences between two identical laptops is interesting. There could be very slight differences and the RFI could be right at the threshold of what the components can take - one handles it, the other has just the slightest difference that makes it just unable to handle the same level of RFI. For example, say there were something referred to as RFI Units, and your station had 100 RFI Units present at the laptop position. One laptop might handle 100 or even 101 RFI Units, and the other can only handle 99 RFI Units due to slight variations in components in each laptop. There are analog parts in the laptop (for example power circuits), and some variance in digital components is common (IC mfg bin parts based on post-production tests do things like speed ratings, and parts are tested aggressively for use in critical circuits like those on space crafts).
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On Aug 3, 2024, at 03:52, dc2jr via groups.io <k.j.raske@...> wrote:
? Well, These Are 2 identical Surface pro3, both Running on battery, so the rfi effect should be identical
vy 73 de Klaus, DC2JR Von meinem iPhone gesendet Am 02.08.2024 um 20:39 schrieb Greg Sanders via groups.io <KE5DXA@...>:
? I'm also thinking it sounds like RFI. It's working but fails. Both computers are not the same, regardless of the OS. Circuitry design, RF noise, parts used? internally being different from different vendors, etc. Even the same make and model can act differently. I once had a computer randomly reboot, changed out the power supply and the motherboard. Turned out the surge protector's MOV was bad. Had another one that kept having a screen go blank, turns out the keyboard had a bad ground and was picking up static. Troubleshooting sure can be fun ?
?
Greg
KE5DXA?
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On Sat, Aug 3, 2024 at 01:52 AM, dc2jr wrote:
Well, These Are 2 identical Surface pro3, both Running on battery, so the rfi effect should be identical
?
vy 73 de Klaus, DC2JR
Von meinem iPhone gesendet
Am 02.08.2024 um 20:39 schrieb Greg Sanders via groups.io <KE5DXA@...>:
I'm also thinking it sounds like RFI. It's working but fails. Both computers are not the same, regardless of the OS. Circuitry design, RF noise, parts used? internally being different from different vendors, etc. Even the same make and model can act differently. I once had a computer randomly reboot, changed out the power supply and the motherboard. Turned out the surge protector's MOV was bad. Had another one that kept having a screen go blank, turns out the keyboard had a bad ground and was picking up static. Troubleshooting sure can be fun ?
?
Greg
KE5DXA?
Troubleshooting this thuroughly would require swapping the OS between devices and se if the problem stays with unit or follows the OS..?
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If 2 identical Computers are so different acting to RFI, how can they get FEC or T?V
vy 73 de Klaus, DC2JR Von meinem iPhone gesendet
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Am 05.08.2024 um 05:58 schrieb Bill Lamm via groups.io <kd9mdl@...>:
? On Sat, Aug 3, 2024 at 01:52 AM, dc2jr wrote:
Well, These Are 2 identical Surface pro3, both Running on battery, so the rfi effect should be identical
?
vy 73 de Klaus, DC2JR
Von meinem iPhone gesendet
Am 02.08.2024 um 20:39 schrieb Greg Sanders via groups.io <KE5DXA@...>:
I'm also thinking it sounds like RFI. It's working but fails. Both computers are not the same, regardless of the OS. Circuitry design, RF noise, parts used? internally being different from different vendors, etc. Even the same make and model can act differently. I once had a computer randomly reboot, changed out the power supply and the motherboard. Turned out the surge protector's MOV was bad. Had another one that kept having a screen go blank, turns out the keyboard had a bad ground and was picking up static. Troubleshooting sure can be fun ?
?
Greg
KE5DXA?
Troubleshooting this thuroughly would require swapping the OS between devices and se if the problem stays with unit or follows the OS..?
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dc2jr
Greg Sanders
Bill Lamm