Wednesday, October 7, 2015

4th October, 2015 - my first 3.4Ghz contact, 0110 to 0115 UTC, worked VK2JDS and VK2AVR/p , distance 500 metres at QF46, we finished modifications and tested our transverter units that came from Geelong ARC, .75w o/p FM, 60/9 signals at each end, ready to do some serious 3.4 GHz terrestrial activity. Now have 1296Mhz, 3.4GHz and 10Ghz transverters ready to go.

23cm EME portable activity - 2nd October 2015

VK2KFJ/p long weekend 23cm EME activity, all on JT65C, using 5 metre dish and 120w from QF46
2nd Oct 2015, 2205 utc, PA3CQE, Frans, JO21 Nederlands, -11dB 1296.064, Az 303deg, El 14deg, Doppler -770Hz
2nd Oct 2015, 2211 utc, VK5FA, Andy, QF95mm, -26dB, 1296.070, Az 301deg El 12.5deg, Doppler -3kHz
2nd Oct 2015, 2225 utc, UA9YLU,Victor, MO92hx, -13dB 1296.070, Az 300deg, El 10.6deg, Doppler -1.8khz

Friday, May 30, 2014

some new beacons

VK1RSB   Canberra
144.410     On-air, temporary vertical antenna  (FSK)
432.410     constructed , awaiting installation   (FSK)
1296.410   constructed , awaiting installation   (direct CW)
Dual "big wheels" horizontal antennas planned will be used for all 3 x bands.
VK2RSF   Nimmitabel
144.414    On-air
432.414    On-air
1296.414  planned 

of most interest to me is the  23cm beacons, these will be good for test references from Sydney.

Tuesday, May 13, 2014

Linux updates and WSJT

I updated my Linux boxes, Debian 7.3 to 7.4, Fedora 18 to 20, Ubuntu 13.10 to 14.04 LTS and Centos in 6.5 final. 

Cant go to Centos 7 as they only releasing a 64bit version, will get a 64bit box when the 32 bit server dies. 

Wondering what new adventures lay ahead trying to get WSJT and WSPR compiled and running on these latest Linux releases ...... mmmmmm

I did download the latest offering of WSJT from John Nagotch, to suit Ubuntu 14.05 "Trusty",
WSJT 9.7 r3639,  John kindly compiles different versions of WSJT and WSJTX for various releases of Ubuntu, which makes for a quick download and install for those not in a position to compile WSJT/WSJTX for Ubuntu,  you can obtain them from  this URL

 It installed fine, runs fine, but the audio interfaces that were compiled into this binary dont work with my Dell Inspiron 6000 notebook,  so its back to downloading from berlios repository and try again to compile it myself, although, I will try the qmake-qt4 as this seemed to be the new path for doing a make, using the development suite from  as mentioned in the WSJT Development forum discussions.

Thursday, February 6, 2014

1296 Mhz and 10 GHz transverters

I started documenting the building of some transverter kits for 1296 Mhz (23cm) and 10 GHz (3cm) to inspire others to try (what I consider is) this new frontier of amateur radio.

I say "a new frontier", as the proliferation of kits and surplus of microwave gear, opens the opportunities of experimenting on microwave bands to more people.

If you have never looked, then go look at VK5EME Minikits  and VK3XDK websites.

anyway, here is my microwave page:

SDR update

if you had played with,  or attempted to play with those little USB TV dongles,  e.g. the black dongle that Andrew VK3BQ sent as link for on ebay end of last year.  The black rtl2838 based dongle is more sensitive and less prone to image signals than the white rtl2832 based dongle we had used in the past.

I can advise that the  SDR#  (sdrSharp) website have greatly  improved their download and install package and install procedures, it's now a much easier task. And the site have also improved their install procedures instructions, for those using RTL based dongles.
The latest Zadig USB driver installer is much improved too. Note: two versions of Zadig, one for XP and another version  for Vista,Win7 & Win8.

begin here at the SDR# downloads area:

which includes links to install procedures on for MS Windows and Linux

Somehow I broke my SDR# installation on my notebook last year whilst trying to update it and could not get it running properly, but I did the download and reinstall yesterday and now it all works great, I can even swap between dongles to compare them, both dongles work fine. Really pleased with it now.


last week was pretty good for propagation from Sydney, with the High pressure cells sitting over the Tasman sea for days, we were presented with consistent tropo ducting up and down the coast of NSW and across the pond to ZL as well as trops across the Great Australian Bight which provided paths from vk6 to vk5, vk3.

As far as paths from Sydney, we had openings to Tamworth to both their 146.750 and 439.950 repeaters,  paths to Buladelah 147.100 regularly, good paths to south coast such as 146.825 near Bega, 146.625 Goulburn  was strong on quite a few occassions, in fact one day it was 60/9, with Mt Ginini 146.950, and the local Canberra repeaters 146.725 and 147.175 heard on occassions. One one night I found 147.025 from Mt Canobolis (Orange) accessible, I called someone to come up on it, but that repeater faded into the noise before we could make a contact.

monday night this week, heard activity on 146.700 near Nowra.

Last week several VK2 and VK4's made it across the pond to ZL1 on 2m,70cm and 23cm SSB, even ZL1TPH/p was receiving the Dural VK2RWI 1296.420 beacon on more than one day, that's pretty impressive, but makes me optimistic that more regular 23cm contacts across to ZL are probable. It provides me with more incentive to get 23cm SSB gear active and a dish up and aimed at ZL next summer.

I did note that the tropo just does not extend inland and with enough intensity for contacts on 2/70/23 to ZL, I think the inland inversion ducting is the much more common propagation mode, which of course occurs mainly at night.

Wednesday, January 22, 2014

Kenwood TR9130 and TR9500 modifications

I finally got a round to documenting some mods I did to my Kenwood TR-9130 2metre All-Mode trasceiver and TR-9500 70cm All-mode transceiver.  Basically I replaced the incandescant lamp with green LEDs to provide a better backlit Signal meter, plus some other improvements.

see the modifications here on my website:

Tuesday, December 31, 2013

23cm repeater testing

went to Long Reef on the coast, to see if I could key up the Newcastle 23cm repeater, yes, it works, s0, not as strong as I thought it would, comparing to Somersby VK2RAG it was about s4.
It was enough to provide proof of concept of the path.
Could not key Chatswood or Dural 23cm repeaters.
Next will try from North Head.

Tuesday, December 10, 2013

Newcastle 23cm repeater

drove up north of Terrey Hills to a high lookout  overlooking Cottage Point & Akuna Bay ,  ( 33deg 38.06min S, 151deg 12.56min E, QF56OI  alt.177m)  using the Double-Quad antenna I could key up the Newcastle repeater VK2RTZ 1273.100 / 1293.100 it came back with a signal strength of 10/9. 

In comparison to Somersby repeater VK2RAG 1273.400 / 1293.400 which came back with 60/0 signal. Both repeaters have voice ident.  Gave some calls, but nobody around.

Tried to key Dural repeater VK2RWI  1273.500 / 1293.500, no luck, it is deaf.  But switched  the Double-Quad antenna to horizontal polarisation, I could hear the VK2RWI beacon on 1296.420 ok

Chatswood repeater VK2RWC 1273.200 / 1293.200  was a no show,  but this was to be expected, as I was in its shadow.