Hello Last night, Gordon G0EWN and I carried out a short, 10km, test across the city of Sheffield, UK, to try out our new transmitters. The attached photo...
Hello I forgot to mention in my previous post that I'm driving my LuxeonIII using VK7MJ's electronics (circuit downloaded from the group pages Rev2.1,...
Hello Barry The OPT101 is not a very sensitive device because it is fitted with only 1 Mo feedback resistor. The KA7OEI's receiver or a even a simple K3PGP Rx...
Hi Barry, Congratulations on your work! You might mention what the overload/distortion sounded like or, if you have a recording - provide a link to it. For...
Barry I have just begun to look at the schematic of the transmitter, so I am not sure what it is doing. Nor am I familiar with what it should be doing. That...
Hi, Can anyone tell me the year of the first Amateur Radio Laser Communication experiment conducted in Australia? I recently tried to apply for a permit to...
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Ron VK3AFW
vk3afw@...
Oct 13, 2010 1:21 am
Hi ken, 1 A bit hard to establish as there is no amateur radio allocation these days above 250 GHz. 2 You would need to apply for approval under another...
Hi Ken, Have you tried buying from an on-shore supplier? I bought many lasers a few years ago for my university research group & was never knocked back. Maybe...
Hi Paul, So far my dealings with weapons licensing have been very unproductive. As far as they are concerned they have never heard of Amateur Radio and have no...
Clint I'm having difficulty finding a UK stockist for the high power red Phatlights. Can you suggest one in the US? My son works in Washington and so I could...
Hi all, Its been a wet,cold and windy now for a few days and hence no more tests with laser transceiver. I think this weather will last into next next week....
... Yo, I don't know which kind of photosensitive device you are using, but if it is a photodiode, reverse breakdown LED, avalanche photodiode or even a SPAD...
John A 1 KHz tone oscillator which can also be keyed would be useful. Also, how about an audible S meter? See KA7OEI's web site for a circuit. 73 Barry, G8AGN...
Hi Barry, Got that already, but not keyed. Will have to drill another hole for the socket..no problem. John ________________________________ From: Barry...
Hi, Good idea regarding noise, and blacking out the inside of the box. I may try and use a rubber seal around the perimeter, but good old matt black piant will...
Happy New Year All Where can I find the files for Weak Signal Communicator? ... Weak Signal Communicator Setup 1. These files make up WSC and should be in the...
hi Barry, I've looked high and low for those files but they don't seem to be anywhere. You might have better luck asking the author directly or asking over on...
Tim Many thanks for your feedback. This morning, coincidentally, I have also had an e-mail from David Smith, who wrote the WSC code. 73 Barry, G8AGN Laser and...
Greetings All, The following appeared on the RSGB news and was picked up by ARNewline: New UK Optical Record Set On 3rd April a new distance record set for...
Way out of date! Well and truly exceeded since then! Record, as of a few days ago now 117km..... 73 de Sam, G4DDK Sent tomorrow from my time machine...
Hi Miguel, Like any group, I suppose that it becomes what those who are members make of it. Having said that, another group that seems to be a bit more active...
Hi Miguel, Many of the UK folks, knowing that the distances are more likely to be limited by geography than atmospheric attenuation, have chosen to sacrifice...
Ahhhh, apologies for the old news and great to hear the distances are extending. Just thought I'd spark some life into this list as it has been a little quiet...
Thank you for your explanation, Clint. I'm very surprised. I could not even imagine to go to 100km apart and have still 30-40dB margin so subcarriers are...
Hi Miguel, Many years ago, I was somewhat surprised to note that I could easily spot the light from a flashlight across 10's of km distance - but upon ...
Thank you Clint for your extensive message. But now an old question I have not been able to solve to myself. See this image: http://ea4eoz.ure.es/focus.png ...
Hello, I think you should try to illuminate a maximum of the active surface. But... the smaller the active surface the better the signal / noise ratio (roughly...
