With due consideration to the forum currently being hosted over ADSL I won't post an image but I'm building a Cumbria Design DSP audio filter.

I know I could buy a BHI speaker which does a similar thing but I think this works out cheaper and I get to build it myself.

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I had same WR-90 laying around so I thought I would try and build a BPF for 10GHz.

I came across this design by W1VT.
   

The design uses a small piece of WR-90 and some small hardware which should be easy to obtain.
   

After a quick tune I found that the probe length has large effect on the filters frequency.

The filter has a bandwidth of around 80-90MHz and a loss < 1dB.

   

Back on August 22nd Gavin VK3HY suggested a 3.4GHz activity day for the 28th of August. Even with the short notice a number of people took advantage of the opportunity and got their gear out to play radio. Here is my belated report of the day.

It was very pleasing to hear everyone on air and great to hear that once again our ZL friends joined in the activity. I along with Chris VK3ACG and Garry VK3VLA set up at Mt Anakie where we heard and worked the following stations;

Mt Dandenong: Gavin VK3HY, Rob VK3MQ
Mt Buninyong: Ian VK3AXH, Anthony VK3CAP (First microwave adventure),
Ian VK3IDL, Bob VK3BNC
Barrabool Hills: Chas VK3PY
Geelong: Cal VK3ZPK
Kinglake area: Bernard VK3AV
Camberwell: Alan VK3XPD
Mt Ridley, Craigeiburn: Damian VK3KQ: Ralph VK3LL
Mt Tassie: Ralph VK3WRE
Loch: Peter VK3APW

In ZL, Brian ZL1AVZ, Harry ZL1BK, Simon ZL1SWW and Stephen ZL1TPH all got on the air.. Ralph ZL1TBG was to >be on but never heard.

We heard faint traces of Matt VK3PP's keyer from Hamilton but he could not hear us. We missed Craig VK3KG who had some issues with his receiver. By all accounts Craig put a strong signal into Melbourne. We also took 2.4GHz with us specifically to work Bernard VK3AV on his new transverter and to allow Garry VK3VLA to operate microwaves under his recently acquired standard call. On 2.4GHz all three of us worked VK3APW, VK3AV and VK3HY.

I suggest the next event (whenever that may be) should be 2.4GHz as it allows the standard call operators to join in the fun. For the record, standard call operators are permitted to work on 1.2GHz, 2.4GHz and 5.7GHz - certainly enough bands to keep them busy on field days.

Thanks to Gavin, Rob and Ian who got the ball rolling on another fun microwave activity day.

Radio Amateurs Old Timers Club Australia Inc
http://www.raotc.org.au/

The Radio Amateurs Old timers Club of Australia (RAOTC) is eager to attract new members, particularly younger members, to help to keep the spirit of Amateur Radio alive, revitalise the club and ensure its continued existence. We believe that there is a place for a club like ours which complements existing amateur radio clubs and other amateur organisations.

Many amateurs know very little about the RAOTC. Here are some ideas and information about the RAOTC that may be worth considering to someone who has been qualified to hold an Amateur Licence for ten or more years.

To many, an ‘old timer’ portrays the wrong image. As you know, an ‘old timer’ does not have to be a person of mature years and a good explanation of this appears on the RAOTC web page at http://www.raotc.org.au. In fact, the first Foundation Licence holders are now eligible for membership of the RAOTC!

The RAOTC is a National club with a membership of around 470 amateurs spread right around Australia, stronger in some States than in others. It does not hold regular meetings or other activities as do other radio clubs, so no regular commitment of time is necessary. The RAOTC holds two luncheons per year in Melbourne, a monthly luncheon in Perth and an annual luncheon in Adelaide. Members have the opportunity to meet up with friends over a meal and a drink. It would be good if membership would grow sufficiently in other states so they could also enjoy meeting at similar get-togethers.

The RAOTC can assist members and their families, and advise them what to do with radio equipment, books and components belonging to radio amateurs who are no longer on the air for various reasons.

If you would like to join the RAOTC, there is an application form for membership available as a PDF and, if you decide to join before 1st January 2017, the $5.00 joining fee will be waived.


(This info was extracted from an invitation I recently received to join RAOTC, but there was more than could be posted if someone asks.)

and...

Don't forget the RAOTC QSO Party on 40M and 20M on Saturday, 8th October 2016

Full details at http://www.raotc.org.au/qsoparty.htm

Doug VK4ADC

Last Tuesday I tripped over a group (mostly in the western suburbs of Melbourne) on 144.310 SSB. They all operate with vertical antennas so anyone with an all mode rig can have a go with SSB and make some contacts. The net apparently starts around 7.30 pm on Tuesday. There is also a 70cm version on Monday evenings 432.310 at 7.30pm.
The discussion is very casual and I found it quite enjoyable. If you have a 2m or 70cm allmode box and a vertical antenna and live in Melbourne or the surrounds, I am sure you will be made welcome.

Mike

Its on again, the Microwave show and tell at the SCARC club at Seaford Meadows. The Seaford Meadows Scout facility on Railway Road is the venue, on Thursday 15th September, from 7.30pm. Looking forward to seeing some of the new gear, and developments from last year.

Daniel Flakelar - VK5DF
Secretary | South Coast Amateur Radio Club inc
secretary@scarc.org.au
South Coast Amateur Radio Club inc.
PO Box 333, Morphett Vale SA 5162
Website: http://www.scarc.org.au

Just before VKLogger shut down for posts, Andy VK3YT posted:

Hi all,

PS-68 is planned for release at 7am Sat 27 Aug 2016 AEST.
Solar powered party balloon, 10mW TX
APRS on 145.175Mhz
Olivia 8/250 with RSID on 434.649Mhz USB (Dial frequency)

Tracking as PS-68 on SNUS https://tracker.habhub.org/#!mt=roadmap ... ay&f=PS-68
and VK3YT-11 on APRS.FI http://aprs.fi/#!mt=roadmap&z=11&call=a ... tail=43200

Prediction (the red line)
Image

Assistance with tracking is appreciated.

Instructions for tracking can be found here http://picospace.net/?p=736
There should be someone on the IRC forum to help with setup http://webchat.freenode.net/?channels=picospace

Andy
VK3YT

What happened ? Did it make it to SE Qld ?
I try to keep across these but that weekend got very busy.

Doug VK4ADC

Southside Amateur Radio Society (SARS), Logan Qld

Business meetings 1st Wednesday of each month at Logan Central;
Social meetings on the 3rd Wednesday at varying locations in the Logan area.

Club net at 7.30PM on VK4RAX Mt Cotton, 147.675, possibly going to HF also.

Query here against this topic on OzLogger if you want to find out where meetings are each month.

http://www.southsidears.org.au/