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Peter Marks
Works at Australian Broadcasting Corporation
Lives in Sydney
137 followers|1,746,055 views
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Peter Marks

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Slinky dipole for 40m on balcony
My 10m wide balcony works fairly well for 20m but I wanted to try 40m. Good news, Australian Geographic stores carry very nice metal slinky's for $10 each so today I made up a balun and strung up two slinky's as a dipole. A question: should the turns go the...
My 10m wide balcony works fairly well for 20m but I wanted to try 40m. Good news, Australian Geographic stores carry very nice metal slinky's for $10 each so today I made up a balun and strung up two slinky's as a dipole. A...
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Ham radio story on ABC Open
Stephen, VK2BLQ spotted this story on ABC News24 the other day. A great piece from ABC Open. Brenton: Ham Radio from Micah Barnes Photography on Vimeo .
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Peter Marks

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Antenna experiments curtailed in the flat
It's the down side of living in a unit. My squid pole antenna support off the balcony is virtually invisible from the ground, but not it seems to the resident one floor above. Today I received a polite but firm note. I've only been leaving it up over weeken...
It's the down side of living in a unit. My squid pole antenna support off the balcony is virtually invisible from the ground, but not it seems to the resident one floor above. Today I received a polite but firm note. I've o...
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:-(
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ARNSW Home Brew Group - Smart phone and tablet apps for Ham Radio
Today at the ARNSW Home Brew group, a different kind of meeting. We turned to a survey of applications for Ham Radio that run on popular tablets and smart phone. Convener, Peter, VK2EMU rigged up an impressive camera on a tripod to project devices on to the...
Today at the ARNSW Home Brew group, a different kind of meeting. We turned to a survey of applications for Ham Radio that run on popular tablets and smart phone. Convener, Peter, VK2EMU rigged up an impressive camera on a tri...
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Peter Marks

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iOS icon resizer script
Goodness, iOS 6 & 7 needs a lot of different icon sizes for a universal app. I wish Apple would support SVG. Here's my little script to resize a large icon down. It requires Imagemagick. #!/bin/bash # Usage: iconmaker.sh bigicon.png # You need to brew insta...
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Using a PC headset mic with a KX3
The KX3 is a radio with convenient standard looking connectors, either 2.5mm or 3.5mm sockets. Elecraft mentioned that many low cost PC headset mics can be used in the four conductor mic socket but I found for my Logitech unit a small adapter cable had to b...
The KX3 is a radio with convenient standard looking connectors, either 2.5mm or 3.5mm sockets. Elecraft mentioned that many low cost PC headset mics can be used in the four conductor mic socket but I found for my Logitech uni...
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Peter Marks

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How I lost weight
When I returned from Hong Kong in 2002 I was 82kg, today I'm fairly stable at around 71kg. My work is sedentary and losing weight is a struggle. I hate depriving myself at every meal as you do in a traditional diet. Last year I got a Fitbit and did 10,000 s...
When I returned from Hong Kong in 2002 I was 82kg, today I'm fairly stable at around 71kg. My work is sedentary and losing weight is a struggle. I hate depriving myself at every meal as you do in a traditional diet. Last ye...
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Same for me, I felt better for being fitter but it didn't take off much weight. Oddly, on "fast" days, I spend lunchtime doing a walk which probably does double the good.
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Home made low cost keyboard tray
I'm finding typing on the dining table gives me sore shoulders so overnight I had an idea. Two F-clamps and a plank and I have a nifty adjustable keyboard tray. No doubt this is elaborate procrastination but it seems like a simple solution.
I'm finding typing on the dining table gives me sore shoulders so overnight I had an idea. Two F-clamps and a plank and I have a nifty adjustable keyboard tray. No doubt this is elaborate procrastination but it seems like a...
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Peter Marks

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hello there. Everyone gets g+ in the end. No choice.
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And so the empire expanded
:-)
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Peter Marks

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Made an Unun for feeding end fed wire antennas
Following pictures and diagrams from M0UKD , I've built up a 9:1 impedance transformer sometimes called an Unun. This transformer meant that a random wire strung up on the balcony could be quite easily tuned up and achieved a 1.1:1 SWR without too much trou...
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People
In his circles
139 people
Have him in circles
137 people
George Bray's profile photo
Lars Andersson's profile photo
Paul Anslow's profile photo
Steve Steinitz's profile photo
Dennis Kavadas's profile photo
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Currently
Sydney
Previously
Melbourne - Hong Kong
Work
Occupation
Software Developer
Employment
  • Australian Broadcasting Corporation
    Software Developer, present
  • Apple, CNN, ABC
  • Whitesmiths
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Gender
Male