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

THE ULTIMATE 3 WSPR PART 2 (TESTING)

The completed U3 with room for more addons if needed

Another view from the rear with antenna, power (5 volts) and gps sockets

The GPS new and old (the old V,KEL in the box with 3.3v regulator board)  SKM61 has just been delivered and is pictured to the right of the box

I would advise to use quick drying transformer varnish

THE ULTIMATE 3 WSPR PART1 (BUILDING)

 Well the Hans Summers U3 Kit arrived and as you can see i had my work cut out....

 

As you can see the PCB's are really well made and a pleasure to solder

 I mocked up a couple of test low pass filters to test the U3 with temp hot melt

 Once the U3 was built i powered up and it worked first time

 

Filters in order from left to right 160, 80,40,30,20 and 10 meters with a fresh coat of transformer varnish which seals them from the elements and holds them in place... no nasty hotglue

 The GPS i purchased from ebay  and the lovely new case came so we are on the home straight !