Originally posted by trigger
View Post
It is due to radiation pattern of the antennas. The 1/2 wave dipole has a higher gain than Franklin for nearby planes.
Please see the drawing below.
(2) As far as long distance goes it is definitely down by about 50nm on my coiled Franklin.:
(a) Try larger diameter can (330mL Beer/Pepsi can dia 2-5/8 inch = 66mm).
(b) Is your whip's FINISHED length 69mm? (see my post #1455 above)
(c) Are you comparing the two antennas With or Without Amplifier?
(3) Is the reason that aluminum cans are recommended to avoid long term problems with rust? I have a Baked Bean can that I'll mangle this afternoon.
The reasons I used Aluminum can are:
(a) Aluminum is non-magnetic.
(b) Aluminum is easy to cut & drill hole.
I wanted to try a can larger than standard drink cans. I could not find any made of aluminum. All larger cans were made of iron sheet. I then emptied a baked beans can (ate the beans for lunch) and tried to cut the can, but was unable to cut it, as the can was made of iron sheet and was harder than what my hand hacksaw could cut (I don't have a power hacksaw). I then gave up. The beans can had the advantage of larger dia & a flat bottom. I still want to give a try to such a can.
Comment