In conjunction with Melbourne QRP by the Bay, this is a demonstration of 160 metre (1.8 MHz) AM communication with home, mobile and portable stations around Port Phillip. The video was shot at Chelsea beach of VK3AML's 10 watt Seacom AM transceiver on 1825 kHz.
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https://www.youtube.com/watch?v=FdsJBIwIoiY
Using two cheap Chinese handhelds (Baofeng UV82) to work through the AO91 amateur satellite. Their performance is marginal for this application. But if you pick a high pass, operate out in the open and choose a time when there's not many others on then you may make contacts.
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https://www.youtube.com/watch?v=sJrA62t141s
These were $20 special buys at Aldi. Claimed range was 100m. Never having experimented with 2.4 GHz before I couldn't resist buying a pair. In this video I take a look inside then do some range tests over various paths.
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(then if you buy something I'll get a small commission at no cost to you)
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https://www.youtube.com/watch?v=0Q98oWR_zr0
A look through various Dick Smith Electronics catalogues between 1981 and 2000.
This is Part 1, looking at the 1981-2 catalogue only.
Part 2 will follow shortly.
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https://www.youtube.com/watch?v=-KAa99b-0zA
When winding antenna wire (or rope) over your arm should you wind in circles or a figure 8 pattern? Watch and find out.
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https://www.youtube.com/watch?v=rQ5aZj8QqxI
40m QRP with 3 transistor direct conversion transceiver. 2 transistors in transmitter, 1 transistor reflex receiver. More on the receiver in a later video. Also general Q & A.
PS: If you liked this video please consider supporting Amateur Radio VK3YE by:
* Subscribing on YouTube
* Checking my books page at https://books.vk3ye.com
* Shopping on Amazon via: https://amzn.to/3iiDQXv, or
* Shopping on eBay via: https://ebay.us/i9DuWP
(then if you buy something I'll get a small commission at no cost to you)
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https://www.youtube.com/watch?v=k5BUKoLm9A0
Description of a 80cm diameter magnetic loop antenna for HF pedestrian mobile operation on all bands between 7 and 28 MHz.
This one is heavier than my previous loops (being made of copper tubing) but delivers better performance.
JUNE 2012 UPDATE: A video comparing this loop with another is presented at http://www.youtube.com/watch?v=YswnVmAKSP0 I have a new favourite loop!
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https://www.youtube.com/watch?v=vGdV0Us5JSk
80m SSB contact with VK3AML/7 on Deal Island, an RF quiet location about 200km away. I drop my transmit power. How low can I go and still be heard? Watch and find out.
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https://www.youtube.com/watch?v=wAYv1SKMFrE
Experiments with 3.5 MHz pedestrian mobile with a 5 metre centre loaded vertical in the water. Stations worked were up to approximately 150km distance. The time was 8am. Interestingly the effect of touching the sand was less marked than on 40m.
Use this to calculate the inductance required for centre loaded verticals: http://www.m0ukd.com/calculators/loaded-quarter-wave-antenna-inductance-calculator/
Use this to calculate the coil dimensions for the required inductance: http://www.daycounter.com/Calculators/Air-Core-Inductor-Calculator.phtml
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https://www.youtube.com/watch?v=FfaKRIDFUho