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Wednesday, 15 July 2015

New Anennamabob!

Well,

Quite some time ago I was rummaging on the internet and I came across this site:

http://n6bt.com/

Now, particularly interesting to me was this antenna:

http://www.n6bt.com/n6bt-Q52-p1-1.htm

It's called a Q-52 and is basically a shortened, inductively loaded 2 element beam for 20, 15, 17, 12 & 10 meters.

I ordered one and yesterday it arrived.


The antenna came in 7 parts; 3 part boom plus each side of the elements telescoped into itself - the box was surprisingly small.

Each element (the driven element and the reflector) have a switch controlled relay box which alters the element inductance.


Then there is a central wire connection box which allows you to run a control cable back to the shack where you select the band required on a rotary control unit:


So here it is on the mast, I have removed the MA5BB that I have been using for a few years; this antenna has less visual impact and also less weight. The main reason for changing the antenna is that this will give me 2 elements on 17 and 12, the MA5B is just a rotary dipole on those bands.



Time will tell, but the concept is certainly interesting. The construction of the antenna looks excellent and building it was very simple indeed.

More to follow!

New cats Maggie and Luna are settling in nicely:


Local conditions,

Fn egh?

Friday, 29 May 2015

Israel on 6M? No way!

Well,

Here's a quick video of 4X4DK as received at my QTH on 16th May 2015. He was stronger on 14th May when I worked him.



My QSO is already confirmed in LOTW.


Good, egh?

Thursday, 21 May 2015

New Antenna Time

Well,

Following all the fun I have been enjoying on 4M, 6M and 2M using Meteor Scatter I decided to upgrade the antennas I have for those bands.

Here's the installation after completion:


Nut's egh? Both the 2M antenna and the combined 4/6M antenna are from InnovAntennas. The 2M antenna SWR is excellent through the whole band, as is the 6M antenna:


The 4M antenna is not so great (due to the proximity of all the other metal):


I've spoken to Justin at InnovAntennas and he has had me pulling elements with cable ties and also wrapping tin foil round elements and sending him plots. I am sure we will get it sorted!



Fun egh?

Thursday, 14 May 2015

They call it the Magic Band....

Well,

Been messing about today on 6M. There have been quite a few openings over the past few days due to Sporadic E. This was the sporatic e cloud map from DX Maps earlier today:


The numbers in the boxes represent the MUF (Maximum Usable Frequency). This is the resultant QSO map:


How did I do? I worked a lot of stations in and around Europe, my best being 5B4AAB (Cyprus) and 4X4DK (Israel); both contacts must have been multi-hop Es. You can see the spots for 4X4 and 5B4 on the map above. I was particularly delighted to work 4X4DK as G3OCA was calling him and I was the one that bust the pileup! Ken, as usual, had a spectacularly bad signal that was half a mile off frequency. I was unlucky enough to spend some time with 3OCA when I used to go to the Nunsfield House Amateur Radio Group - he is the most arrogant man I have ever met.

This is my all-time 6M log converted to a map:


I am a member of the UKSMG (UK Six Meter Group), and they run a summer marathon on 6M. Here's the log table (before anyone else uploaded today!):


The only thing that I can guarantee is that I won't stay second for long!

good fun, egh?

*** Update ***

Christian SWL in JN77sn has sent me an Audio file of my transmissions from earlier today, take a listen:

Audio File

Monday, 11 May 2015

It's great to be in the fracas!

Well,

Today has been an excellent day for 6M Sporadic E. This was earlier this morning:


And then tonight the band opened again:


If you haven't witnessed a Sporadic E opening on 6M before, here's a quick video of Tony, I2PJA received here in IO93GA (that's 715 miles as the RF flies):


I'm no 6M wizzo but here's my 6M QSOs from my log converted into a map:


Good, egh?

Local conditions.

Saturday, 9 May 2015

The Tigertronics Signalink USB

Well,

Following my frustrations with the Yaesu SCU-17 rig interface back here:

http://g0mgx.blogspot.co.uk/2015/05/whats-going-on-here-then.html

and more here:

http://g0mgx.blogspot.co.uk/2015/05/whats-going-on-here-then-part-ii.html

I've been fiddling today with a Signalink USB interface. This suffers from similar issues to the Yaesu device, but there are a couple of excellent internet resources that help you fix it, here:

http://www.frenning.dk/OZ1PIF_HOMEPAGE/SignaLinkUSB-mods.html

and here:

http://www.k7sfn.com/projects/signalink.html

So here is my Signalink half way through the fiddling process:


One of the most important mods in the link above is the replacement of a cap on the board with a 33uF value component. My Signalink already had 33uF onboard so this was left as-is.

What I have done is (documented on the links above), firstly added a 4.7uF capacitor to the power rails for the internal PIC:


I have also removed the 1K resistor feeding the audio circuitry power and fed the supply via 470R and the orange jumper wire you can see. This takes the power from the PIC regulator rather than the dirty USB supply. I have also added 47uF tantalum capacitor to the USB power supply:


That has improved the audio response dramatically and here is what we see post modification:


Now, the Signalink doesn't include an FSK switch to run RTTY, so I have modified the rig -> Signalink cable to bring the FSK keying line to an unused pin on the DIL internal socket, and wired that through a 4N32 opto-isolator to a 9 pin D-type connector I have added to the unit:



This connector can now take a Serial-USB adapter so I can run FSK from the PC.

I've also sold my FT-DX5000 and bought an ICOM IC-9100. I have fitted the optional 3KHz roofing filter and the 23cm module in the radio:



Freddie Cat can't be comfy here, but has been supervising most of the day:


Local conditions.

Thursday, 7 May 2015

Whats going on here then - Part II

Well,

Following my musings about the really pants audio bandwidth from the Yaesu SCU-17 back here:

http://g0mgx.blogspot.co.uk/2015/05/whats-going-on-here-then.html

I've found an old external USB soundblaster soundcard thingamabob and hooked it up to my PC with the audio in and out directly to the PKT jack on the FT-DX5000 (the same connector the SCU-17 uses for audio to and from the radio).

Here's the comparison between the two:


So the old battered USB soundcard has a completely flat audio response, the SCU-17 is totally pants. I am rather horrified at the frequency response from this expensive Yaesu unit - I don't think it's even fit for purpose!

What  load of Dingos Kidneys.

Local conditions.