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Interference & a Galvanic isolator
I'd be tempted to have a chat with your neighbour, mine have always been interested in finding out what could be causing such interference, but perhaps I'm lucky that many of them seem to be ex-engineers.
As previously mentioned, it's most likely a Chinese battery charger or similar, that hasn't got the mains filter components fitted.
Also, don't discount your own property, try and drop the main breaker if you can, whilst monitoring using batteries. It's surprising what can be overlooked.
Regards,
Martin
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What an impressing radio the KiwiSDR really is.
I have to agree with Hans: every day I'm impressed anew with how well this radio does it's job. And beyond! I didn't know half the things it could do until I owned one and saw all the extensions and how to use them. Best utility receiver of all time, hands down. Man I'm grateful this exists.
Bruce KF7K https://kiwi.kf7k.com
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Allow DRM to preempt autorun FT-8 and autorun WSPR [fixed in v1.806]
Thanks! It works fine now.
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Interference & a Galvanic isolator
Dear all,
this is why I have moved the receiving antennas as far away from buildings as possible. The antenna of my KiwiSDR #1 is 50 meters away. The antenna of KiwiSDR #2 is 250 meters away. The 75 ohm lines are buried about 40 cm. This is the only valid solution I have found to eliminate all this radio interference from domestic appliances using a switching power supply.
I also have 32 photovoltaic panels (12 kWp three-phase), which doesn't interfere with KiwiSDR reception, provided the installation is well filtered.
The neutral system on the electrical installation is IT (230 V). This means that there is no neutral and the mains power supply is symmetrical (two-phase).
I hope this helps. Happy RFI hunting. Best regards, Philippe
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What an impressing radio the KiwiSDR really is.
I bought my first KiwiSDR in the autumn of 2016. It has been on 24 hours all days and years since. That is over 70000 hours without any problems. It has been an amazing journey with a constructor that really stands behind his product. The continuous evolution of the firmware is itself impressive enough. I have many radios after 50 years as a licensed ham radio operator. KiwiSDR is by far one of my best investments ever. Many many thanks John. 73 de Hans LA9LT
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v1.806
Okay, I see that. Thanks
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v1.806
From the CHANGE_LOG file:
v1.806 March 12, 2025
Let DRM extension kick preemptable channels so it can run. (thanks VK6KCH)
SSTV extension: Fixed Robot B/W modes and added R36-BW. (thanks N1NKM)
Fixed "continuous update from GPS" of admin webpage grid/location fields. (thanks JQ6LIA)
TDoA extension: Flag sampling hosts as having low GPS resolution (but not doing this just yet).
Fixed more cases of failing to restart proxy client when proxy configuration changed.
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Allow DRM to preempt autorun FT-8 and autorun WSPR [fixed in v1.806]
Good catch! I think I have this fixed now and it will be in the next release. Thanks
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v1.805
From the CHANGE_LOG file:
v1.805 March 9, 2025
Mobile improvements:
Keyboards shortcuts work again, e.g. a Bluetooth keyboard connected to iPad. (thanks DL3LED)
Popup keyboard dismissed properly after "return" key pressed (e.g. on "ident" fields)
Disabled input field auto complete, auto correct, auto capitalize.
Antenna switch:
Buttons now turn green for Kmtronic-2ch switch. (thanks Fernando)
Multiuser/mixing denial notification working again. (Thanks Steffen)
CW Skimmer extension: New. But consider it experimental as there are a number of problems.
SSTV extension: Fixed MP mode height issue. (thanks VK3HK, VK3KHZ)
DX label filter panel: Reset button now clears ident & notes fields.
Update to satellite table to reflect recent Galileo changes. (thanks F4FPR)
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Allow DRM to preempt autorun FT-8 and autorun WSPR [fixed in v1.806]
It seems that if autorun FT-8 and/or autorun WSPR is configured to run, it isn't possible to initiate a DRM session.
It would be ideal if starting a new DRM session would automatically preempt all the preemptible autorun sessions.
Thanks,
Chris
