During the weekly F-troop there are mentions of software, websites and solutions that are worth taking note of. This website attempts to document them.

20180407 - SMS QSO confirmation

posted Apr 6, 2018, 6:02 PM by Onno Benschop

W5WTH Pat shares with us a project he's just completed:

20180212 - Emission Modes

posted Feb 11, 2018, 2:51 PM by Onno Benschop

Andrew VK6AS shares a tool that allows you to lookup the emission modes that the ACMA uses to designate different types of transmissions:

20180127 - HF exploration

posted Jan 27, 2018, 12:12 AM by News Team

John  VK6JD shares an online series of tools that can be used to determine propagation levels around the globe:

20180127 - HF Signals to check propagation

posted Jan 27, 2018, 12:10 AM by News Team   [ updated Jan 27, 2018, 12:11 AM ]

John VK6JD reports from Kalgoorlie that one of his preferred tools for propagation is listening to the Wiluna HF Weather Fax service broadcast on many different frequencies:

20180120 - Flowerpot Antenna for 2m and 70cm

posted Jan 19, 2018, 4:53 PM by Onno Benschop   [ updated Jan 19, 2018, 5:04 PM ]

Lots of discussion about a simple to construct antenna. A good example is:
Bert VK6HDY built one and shares it with us:

#antenna #build

20180114 - Soldering Tips

posted Jan 15, 2018, 5:47 PM by Onno Benschop   [ updated Jan 15, 2018, 5:48 PM ]

Denis VK6AKR sends in this information about soldering:

Hello Onno

One thing that time did not permit mentioning this morning relates to power connections.   Mainly DC power connections.   For these, especially those carrying significant current crimping or compression screwing wins every time over soldering.   The reason as you'll doubtless already know is that a soldered joint *may* offer some resistance which will give rise to heating in the presence of significant current flow.

Crimp connectors, correctly sized for the cable and correctly crimped offer gas-tight joints with high quality (low resistance) contact into the connector pin, finger, whatever.   A good alternative is a screw type connector such as an electrical "blue point" connector.   But in this case the individual strands of wire must not be tinned (soldered) together no matter how tempting that may be.   The reasoning is that solder tends to "flow" over time under pressure and this again gives rise to resistance and heating.   With attendant fire risk.   Not a good look.

So important is this latter point (not tinning wire bundles) that back in my apprenticeship days (radio and TV - valve radio, valve black and white TV) we had to obtain our "cords and plugs" electrical workers' licenses.   This enabled us to carry out necessary repairs to electrical appliances of the plug-able variety.   No fixed-wired stoves, hot water system, etc.   Part of the license was a test where we were presented with various flexible cords, plug tops, terminal blocks and so on, screwdrivers and other hand tools, and a soldering iron, flux and solder all in good working condition.   It was an instant fail for anyone tinning wire bundles to be held under screw tension in plugtops, etc for the above reasons.

Above I said that soldered connections *may* offer resistance.  Ideally a soldered joint will use the solder purely as a mechanical bond.   Electrical conductivity a distant second.   So joining wires involves making the tightest possible mechanical bond between the wires prior to applying solder, which will then maintain the bonding.

Not sure if this is selling coals to Newcastle but there you go.

73
Denis VK6AKR of crappy signal fame!

#vk6akr #soldering #tips

20171230 - Skywire Antenna

posted Dec 29, 2017, 4:55 PM by Onno Benschop

Denis VK6AKR sends us some details about radiation patterns related to skywire antennas:

20171230 - Online SDR in VK6

posted Dec 29, 2017, 4:36 PM by Onno Benschop

Simon VK6MSC has set-up an SDR:

20171230 - Antenna Resource

posted Dec 29, 2017, 4:27 PM by Onno Benschop   [ updated Dec 29, 2017, 4:27 PM ]

Bryan points us at the website of Peter VK6YSF in Northam with details on antennas, baluns and more:
#antenna #resource #vk6ffra

20171209 - A beginner’s guide to using the Allstar network.

posted Dec 9, 2017, 2:33 AM by Onno Benschop

Peter, VK6LB (aka VK6FROG) has published a handy guide to connect to the AllStarLink network.

It describes in detail what's needed, what DTMF codes are needed and how to connect and disconnect to the various resources within the network.

#allstarlink #vk6lb #vk6frog #manual

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