KD5VEZ
11-15-2008, 06:44 PM
I thought this might be of general interest to antenna builders - particulary UHF / VHF antenna builders.
I built a couple of antennas designed for use on the 2m and 70cm bands, using 300 ohm twin-lead (that old TV antenna stuff) in a j-pole design - and was able to use some pvc and some pvc-fittings to make 'walking-sticks' into which the antenna fit.
Here's the fun part -- the second one I build was CAVERNOUS inside... the 300ohm twin-lead just rattled around inside everywhere I walked... and at first I just put packing peanuts inside around the antenna to keep it still...
But then it occurred to me that you could fill it with other useful things, and make it into a useful carrier of equipment should you be called out as an emergency responder.
I've got the plans to build the antenna, and some photos of the results I got. Both the ones that I built worked really well, and would make great additions to a more extensive "Go Bag."
If you are interested in either or both, please email me. Also, FYI, the photos are on the Yahoo Group for the Yaesu VX-5, in the photos section.
I'll try and post a few images here...
Here's the first try all put together:
http://us.a2.yahoofs.com/groups/g_71361/4d90/__sr_/a17e.jpg?grIC1HJBoLKINSft
Here it is opened up (sorry, only the coax is showing):
http://us.a2.yahoofs.com/groups/g_71361/4d90/__sr_/6334.jpg?grIC1HJBTC6bjeWT
Here's the second one, the "Production Model"
http://us.a2.yahoofs.com/groups/g_71361/780d/__sr_/828f.jpg?grIC1HJBHuxB2HkT
http://us.a2.yahoofs.com/groups/g_71361/780d/__sr_/7b3d.jpg?grIC1HJBBn.Uavx4
73,
Alan M. Taylor
KD5VEZ
I built a couple of antennas designed for use on the 2m and 70cm bands, using 300 ohm twin-lead (that old TV antenna stuff) in a j-pole design - and was able to use some pvc and some pvc-fittings to make 'walking-sticks' into which the antenna fit.
Here's the fun part -- the second one I build was CAVERNOUS inside... the 300ohm twin-lead just rattled around inside everywhere I walked... and at first I just put packing peanuts inside around the antenna to keep it still...
But then it occurred to me that you could fill it with other useful things, and make it into a useful carrier of equipment should you be called out as an emergency responder.
I've got the plans to build the antenna, and some photos of the results I got. Both the ones that I built worked really well, and would make great additions to a more extensive "Go Bag."
If you are interested in either or both, please email me. Also, FYI, the photos are on the Yahoo Group for the Yaesu VX-5, in the photos section.
I'll try and post a few images here...
Here's the first try all put together:
http://us.a2.yahoofs.com/groups/g_71361/4d90/__sr_/a17e.jpg?grIC1HJBoLKINSft
Here it is opened up (sorry, only the coax is showing):
http://us.a2.yahoofs.com/groups/g_71361/4d90/__sr_/6334.jpg?grIC1HJBTC6bjeWT
Here's the second one, the "Production Model"
http://us.a2.yahoofs.com/groups/g_71361/780d/__sr_/828f.jpg?grIC1HJBHuxB2HkT
http://us.a2.yahoofs.com/groups/g_71361/780d/__sr_/7b3d.jpg?grIC1HJBBn.Uavx4
73,
Alan M. Taylor
KD5VEZ
