General discussions
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Postby Joevano » Mon Oct 08, 2018 1:57 am

Total newbie here. I have an SDR Play1 connected to a discone at 25’ with LMR 400 to the lightening arrestor, and RG8X fed into the radio. I have noise on all bands as you can see in this pic. What is this from?
AC31AD4E-74B5-4317-81D8-147DEE85B161.jpeg (67.88 KiB) Viewed 1188 times

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Posts: 35
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Re: Noise?

Postby NK7Z » Mon Oct 08, 2018 3:47 am

Probably a switching mode power supply... See:
for a bit on how to ID some of this stuff.

Also see:

for an ever growing catalog iof RFI sources.

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Location: Cheshire, UK

Re: Noise?

Postby g1hbe » Mon Oct 08, 2018 7:59 am

You won't get good signals on the HF bands from a standard discone, they are for VHF only. A long wire or dipole (depending on your circumstances) is more suitable. A low noise solution is an active loop like the Wellbrook 1530.

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