Dear Folks, Having just joined the group I'd like to thank everyone who attended the EMDRC lecture on 'Optical Comms - Beyond The 100 Mile Barrier' last Friday...
Just a warning about the K3PGP circuit, which is widely used by those employing narrow-band digital modes like WOLF and some JT modes in America... It isn't...
Hello All
Just a short note:
Ralph (VK3WRE) and myself (VK3TDV) with the the help of Bill (VK3EBQ) have managed to extend our 22km contact out to nearly...
Congratulations, fellas! I think you've broken the 43 km Victorian record set by myself and VK3KAU (Sunbury)in April 1991 - and it's about time, too! I've put...
After a quick confab between interested parties in Gippsland and Melbourne, we may try a link between Mount Tassie (South-East of Morwell)and Mount Donna Buang...
Well, Murphy's law has struck --- The weather looks uncertain, the Gippsland group feels like a few more day's grace, and we'd do well to have a good day of...
Dear Group, I've just posted pictures and diagrams of the Nazi 'lichtsprecher 60' optical communicator produced by Carl Zeiss in 1941. Note the dual lenses for...
I have brought the 3w Luxeon from Jaycar at our Christchurch branch at NZL $38. South Island componates have the prolight brand up to 5w red. Are these any...
Don't know anything about Prolight. However, I think Jaycar have got it wrong there. They need to update the datasheet and comments on their site. The Red...
One other observation. The 5W rating for the Prolight is the max peak power. Average is actually 700mA @ 4.4V = 3.1W For the Luxeon III, max peak power is...
Dear Murray and Dave, This is a warning that I've given on my website, but it may be worth repeating in view of large amounts of NZ dollars changing hands. ...
Hi Chris, I got my Luxeon from Jaycar, and it is the "right" kind (i.e. Luxeon III Lambertian - LXHL-LD3C). From memory, it's the ZD0520 (not ZD0432, which is...
OK Murray and Dave! The situation with Jaycar must have changed since I visited their Melbourne city store about twelve months back - they tried to fob off the...
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VK3AFW
vk3afw@...
Feb 26, 2006 10:46 pm
Hi Chris and other optical folks, A less complicated system can be built using the movers trolley available new for less than $20 at Bunnings. The handles are...
Thanks Ron, I have several mover's trolleys but what I was really proposing was a three-wheeled device with an integral tripod. With the F550 lenses and ...
Hi Chris & all, My biggest issue at present is time, but I am planning to get the lenses mounted into a box sometime soon! Do not be put off about The Horn -...
Hi all, Since it's obvious that LOS 100+ miles is no major problem, I was wondering if you guys had tried using snow covered mountain peaks as 'passive...
Hi Peter et al, I suspect that it will be the early mornings in winter or late Autumn that might offer the clearest conditions anyway, just making the need to...
Hi Tim! Nice to see you in here from 'the laser reflector'. Speaking personally, from the point of view of bouncing signals from snow-clad mountains, I think...
Thanks Chris I didn't realize it was so flat there. With all the talk about mountains, i assumed they were more common than they actually are. Still, might be...
Dear guys, I've just added two pics of the Surrey Hills Telstra tower in 1999 and today. The big dishes that I used to focus my optical gear on (from 3 blocks...
Dear folks, I've just posted Mike Groth's latest rx design, currently being fitted by Mike into the box which houses his A550 fresnels. It is important to use...
Hi folks, last Saturday night Ralph VK3WRE and I had a number of successful contacts from Mt Tassie (South of Traralgon) across the valley to Tyers and to a...
Hi Chris et al, I was speaking to Chris Long the other night and he's keen to try from Donna Buang to you and/or Ralph, Bernie, George ... wherever you might ...
Hi all, I've added a sound recording (in mp3 format) to the Files section of this site. It is a short recording of Ralph VK3WRE calling me from Mt Tassie over...
Hi David, I hope to be available on both the Friday and Sunday evenings, but not Saturday. I'll check with Ralph to see what his plans might be too. Since my...
Hi group, About 45 folks were at the BARG meeting at which I presented a new version of my optical comms power point lecture - now with video segments...
