The Dish Mount and Controller Forum had us Spinning!

Richard VK7ZBX's impressive 1.8m mobile dish.

Richard VK7ZBX’s impressive 1.8m mobile dish.

We had a great roll up to our forum with many people coming along with show and tell.

Notable there was a large 1.8m AZ/EL dish that was trailer mounted that Richard VK7ZBX brought along – more on that later.

The night was all about sharing people’s experiences. We started with Rex VK7MO who took us on a picture journey of his adventures in dish mounts starting with 1296 and working through each iteration of the mounts and heading into the 10 & 24GHz telescope mounts with milling machine table used for accurate azimuth adjustment. Rex’s show and tell included the azimuth and elevation measuring devices. Thanks Rex.

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Clubrooms Closed Wednesday 15th March

Dear Members,

We have just been advised that due to planned hazard reduction burn being conducted by the Hobart City Council & Tasmania Fire Service, access will be restricted to the upper domain on Wednesday & Thursday, dependant on weather.

In the interests of general safety and member comfort we wish to advise that the REAST clubrooms will be closed on Wednesday 15th March.

We apologise for the short notice and inconvenience this may cause.

Regards
Ben Short
REAST President

Everybody Loves Wednesday Nights @ The Club Rooms!

Don’t think that because the Amateur TV experimenters group is having a break while waiting for a new studio to become available that things on a Wednesday night have slowed down. This past Wednesday saw a cracking display of activity at the club rooms.

Every Wednesday evening the REAST clubrooms are open for members to attend, being up their projects to work on, or just sit down and have a bit of chat about the week with friends.

Tom VK7NTK was busy tuning an analogue filter to boost frequencies in the 1000Hz – 1500Hz range. It is hoped that this board will help improve the attenuation issues being seen with the raspberry pi based IRLP node that is a whole tale in itself!

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REAST AGM and 2017 Committee

Last Sunday REAST held it’s AGM. A modest number of members attended and reports from President, Secretary and Treasurer followed by reports from Ex-Officio officers. Members heard that the Association is currently started a path of change with an increase in activities and further changes will occur this year as a result of the changing lease arrangements and introduction of NBN at the clubrooms. The financials for the Association were in good shape, with a loss for the year attributed to the purchase of new assets.

A committee was elected, with the only change from last year being Scott VK7LXX appointed as secretary as Sean VK7FAZE has stepped down for the year to focus on other projects. Congratulations to all members of the incoming committee. The REAST Committee for 2017 is:

President:            Ben Short VK7BEN
Vice-President:       Justin Giles-Clark VK7TW
Secretary:            Scott Bragg VK7LXX
Treasurer:            Alan Jeffrey VK7KAJ
Committee Members:    Larry Hower VK7WLH
                      Barry McCann 

Draft Minutes for the AGM & reports will be placed on the members only section of the website shortly.

From Maxwell to Marconi – A History of Electrical Radio

February Presentation by Mike VK7MJ

February Presentation by Mike VK7MJ

Last week REAST held it’s first major presentation for the year with Mike Groth VK7MJ taking the audience through a history of radio from Maxwell up until the time of Marconi, where signals were largely generated in the form of electrical spark and modulation of the spark. This was the time of spark gap transmitters and who knew it would be so interesting!

Mike presentation took us through how a spark transmitter was tuned, how a coherer, magnetic, electrolytic and crystal detectors worked, and the role wireless played in the sinking of the Titanic in 1912. We learnt about the early attempts at wireless telephony, the development of the HF alternator and the infamous Pousen Arc converter, and Fessenden’s pioneering Christmas broadcast of 1905.

For those who missed the presentation, we will soon have it up on our Youtube Channel, so watch out for that!