VK5UJ Ham Radio http://vk5uj.com Most recent posts at VK5UJ Ham Radio posterous.com Wed, 18 Apr 2012 06:45:00 -0700 OpenBeacon Transmitter Kit http://vk5uj.com/openbeacon-transmitter-kit http://vk5uj.com/openbeacon-transmitter-kit

Adding to my list of "want to build' items, I saw this one tonight.

OpenBeacon is an open source crystal-controlled QRPp beacon transmitter kit which can output a variety of slow-speed modes, including QRSS, DFCW, and Sequential Multi-tone Hellschreiber.

More reading at the suppliers web site.

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Wed, 28 Sep 2011 06:20:00 -0700 A mini expedition for QRP http://vk5uj.com/a-mini-expedition-for-qrp http://vk5uj.com/a-mini-expedition-for-qrp

Love this video of some guys going on a mini expedition to work QRP in north east Oregon, Eagle Cap SOTA.

Great seeing them work CW and SSB QRP from a nearly 10,000ft summit. Just an awesome take off for RF and great views!

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Tue, 31 May 2011 04:47:00 -0700 WebSDR Slovenia http://vk5uj.com/websdr-slovenia http://vk5uj.com/websdr-slovenia

I was playing around with this WebSDR in Slovenia tonight, well it was around lunch time over there :-)

The first station I picked up on 40m was a CW beacon "IZ3DVW/B" from Italy, I "googled" the beacon callsign and found out it's running 100mw into an inverted V dipole.

I'm not completely familiar with the geography so I used an online grid square converter to work out the distance between the SDR and beacon.

Based on grid square to grid square it was 268km, not a bad distance for daytime on 40m from a low powered beacon :-)

Thanks to the guys in Slovenia for running the WebSDR, it works pretty well and I can't wait to test it during something like CQ WW!

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Mon, 08 Nov 2010 03:37:00 -0800 Continent map http://vk5uj.com/continent-map http://vk5uj.com/continent-map

A map of the continents, a reminder for me :)

Continents

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Sat, 06 Nov 2010 05:15:00 -0700 Very Simple All Mode Receiver http://vk5uj.com/very-simple-all-mode-receiver http://vk5uj.com/very-simple-all-mode-receiver

Here's an awesome really basic receiver you can homebrew with bits from your junk box.

The very simple receiver for the whole shortwave band.
Regenerative control, tuning, band selection, it has everything.
Even a fine tuning by moving your hand towards the coil!

Read more at the authors website.

As noted by Charley VK2ZYZ:

This rig will never be you main rig, it is just a novelty but it is a blast, if you have a junk box and an hour to kill give it a go, build one with the grandkids

Something for a rainy day in the shack.

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Tue, 05 Oct 2010 04:58:00 -0700 30m QRSS Transmitter Kit http://vk5uj.com/30m-qrss-transmitter-kit http://vk5uj.com/30m-qrss-transmitter-kit

I was just reading about this exciting QRSS Transmitter Kit by Hans Summers:

This 30m QRSS Transmitter Kit was produced by Steve G0XAR and Hans G0UPL.

The kit contains a keyer chip programmed with the buyer's callsign, all components, and a 2.5 x 2-inch PCB to build my QRSS transmitter project

More reading at Hans website, however at 15 USD it looks like another kit I can add to my wish list!

 

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Sat, 07 Aug 2010 07:28:00 -0700 Got an antenna up http://vk5uj.com/got-an-antenna-up http://vk5uj.com/got-an-antenna-up

Today I spent some time and got my G5RV / dipole back up in the air. It's only temporarily up, the ends are on poles and the middle is on a ladder in an olive tree :-)

Oh and the coax feeding the balun/600ohm ribbon is pretty horrid.. So I have some work to do before it's a permanent or useful fixture.

Still this afternoon a quick listen on 20m CW I copied KH7Y from Hawaii, and a quick tune up to the shortwave band I heard Voice of Malaysia on 15Mhz.

So maybe not too bad for receiving, although transmitting at this point isn't an option. Will see how much I can improve it or what other options I can find to get a signal back on air.

-.-

 

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Fri, 30 Jul 2010 05:59:00 -0700 WLW 500KW AM Transmitter http://vk5uj.com/wlw-500kw-am-transmitter http://vk5uj.com/wlw-500kw-am-transmitter

I recently stubled across this link while reading something else on the web, as you do :)

http://www.ominous-valve.com/wlw.html

Somehow, he finagled the Federal Radio Commission into an "experimental" authorization for 500 kW, first with the special callsign of W8XO, finally as commercial WLW.

It makes pretty interesting reading, 500KW on AM is not to be sneezed at!

 

 

 

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Sun, 25 Jul 2010 10:06:00 -0700 More radio kits - Small Wonder Labs http://vk5uj.com/more-radio-kits-small-wonder-labs http://vk5uj.com/more-radio-kits-small-wonder-labs

Been looking around for some kits to build and one of the places I came across was Small Wonder Labs.

I'm a bit taken by the Rock-Mite CW transciever, even a kit building noob like myself should be able to have a go at that.

The PSK kit for something like 30m might be interesting, although some of the stuff that you can do with SDR makes it a bit pricey for a once use type kit.

I dropped an enquiry email to Dave K1SWL asking about stock of the RockMite and I had a response in aobut 30 minutes, pretty good customer service.

Will make an order soon I think, mmm the smell of solder smoke, can't wait :)

 

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