Noise Noise Noise

Well after a week of total desperation i had to confront my neighbour about a very strong ( s9+) noise that had materialised....

What i found was he had fitted some ebay LED lamps in his bathroom which i had a look at and made a video of the noise that can be found here      https://www.youtube.com/watch?v=orm_pqqS35c   or direct below

I decided to open the psu up to see if it had any filtering and here is a pic of the noisy little beast

From there i decided to get the Rigol spectrum analyser out and do some noise tests so here goes with the baseline test

Then i done a sweep at 100Mhz with a 200Mhz span

At closer inspection you see the noise is very bad and it has a 25 - 30 Meter radius

Its not all bad! the neighbour is sympathetic to the problem and wants a resolution as much as me so we spoke the the ebay seller who sent out 2 units ( 1 x 6W and 1x 9W). The 6W is fairly quiet and we managed to use the 6W psu to run the 9W led and it let to me track the noise down  to the led psu driver.

I have to add the 6W to show you how different both units are.

 Same packaging just different pcb

As you can see its a lot quieter and has 1 - 2 Meter Noise radius

 I will let you know the outcome as the ebay seller helps us with the noise issue....73's for now G0SCI

RNLI DONATION FROM WEARS CLUB

I am proud to announce that WEARS along with Houghton ARC and Durham DADARS have passed the cheque for the sum of £253.00 to the RNLI.

MOVING!

Not too far though... The new shack is in progress and I have moved it upstairs into my box room.I have a lot more to do but it the shack is coming along nicely. The shack now has a 42" 4K lcd tv, ICOM IC-9100, and I now have a Audio Technica studio mic with Beringer 802 mixing deck.

ITS IAMBIC TIME

Well it was after 12 at night and i was into the small hours of the morning, I wasn't tired and i had the idea to knock up a iambic keyer for my new ebay purchase

I managed to find a arduino nano, a mini piezo speaker, some wire and a couple of 4.7K resistors

More Long distance results from WSPR

Not really much to say except the 100mW travels well

And further again!

The conclusion i have decided on is that the Ultimate 3 WSPR was fun to make and does well!
A big thank you to Hans Summers at http://www.hanssummers.com/ and you can find his Ultimate 3 for sale at http://www.qrp-labs.com/

THE ULTIMATE 3 WSPR PART4 (THE RESULTS)

Here is a few WSPR map results

All in All A Surprising result with contacts from all over the globe using a trap dipole and the U3 txing 50 - 200 Mw ...Barry G0SCI

THE ULTIMATE 3 WSPR PART 3 ( THE CURVES)

Here is the results of the tests i done with the filters with my Rigol DSA815TG

160 Meters

80 Meters

40 Meters

30 Meters

20 Meters

10 Meters

How i tested the low pass filters