Elizabeth Amateur Radio Club

Our club favours VHF, UHF, microwaves, light and contesting.

EARC DATV 445.5 MHz

Photos

2018


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2018-10-03 Keith VK5OQ as guest speaker

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Discussing the 24 GHz transceiver

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10 GHz and 24 GHz horn antennas

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24 GHz transceiver using a bare mixer output.

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24 GHz splash feed


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Vaisala radiosonde recovered by Tim VK5ZT

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Showing the GPS chip far right of pix, 13.6 MHz pcb rf pickup coils far left, radio chip centre left.

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Sensors for temp and humidity. This model no longer measures pressure because altitude is determined from the GPS readings.

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Springy wire antenna that can be soldered. Main operating frequency is around 401 MHz. PLL can be reprogrammed to run at 433 MHz. Power out is about 50 mWatts.

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The 2 x Lithium AA cells are about half used when recovered. The STM32 is under the batteries somewhere. It generates a little bit of heat which keeps the batteries warmer that if the processor wasn't there.

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Labeling

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Status LEDs


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2018-10-14 MAD Day. Microwave Activity Day

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Keith VK5OQ setting up

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Ian VK5IL appeared out of nowhere

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Testing

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Operating with the gloomy weather in the background

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Fully operational.


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The back of Iain VK5ZD car

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Some of the gear

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Setting up

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All the transverters in the one box

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Iain VK5ZD nearly ready

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Is this the ultimate 5 band portable setup? Iain VK5ZD operating 1296 MHz, 2 GHz, 3 GHz, 5 GHz and 10 GHz. The 1296 antenna is barely visible as a boom sticking out under the top solid dish. There are also 2 metre and 70 cm verticals behind the array.

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Steve VK5AIM, Iain VK5ZD and two other VK5's

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Steve VK5AIM 1296 MHz luxury setup

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Steve VK5AIM comfortably operating

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Iain VK5ZD fully operational


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2018-11-10 The Digital Amateur TV transmitter is up and running and is semi operational.

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The frequency is 445.5 MHz and this can be found on almost all modern TV's.


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2018-11-21 Club meeting room. Temporary 20 metre dipole.

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John VK5NI looking serious

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Keith VK5OQ and John VK5KAF analyzing an antenna analyzer.

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Keith VK5OQ and John VK5KAF more analyzing.

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Keith VK5OQ and John VK5KAF more analyzing.

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Test equipment night.

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Steve VK5AIM volt amp meter circa 1941

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Steve VK5AIM volt amp meter circa 1941


20181124-earc-01-graeme-vk5wx-PF86xa

2018-11-24 Spring VHF UHF Field Day, hours 3 to 4. Graeme VK5WX operating position PF86xa west of Ninnes SA. -33.996847 137.938613

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Hours 5 to 6. Graeme VK5WX operating position PF96aa east of Ninnes SA. No one to talk to. By this stage, even my xyl wouldn't talk to me. -33.963558 138.050752