no they are not to drive around with by the way i forgot to mention i run a 2 antenna system= front hot rear grounded so the part about 1/2 s unit gain is from 2 antenna set up not a single antenna.
-
You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.
Capacitance Hat's Don't add Audio
- Thread starter MrSuburban
- Start date
no they are not to drive around with by the way i forgot to mention i run a 2 antenna system= front hot rear grounded so the part about 1/2 s unit gain is from 2 antenna set up not a single antenna.
Well, if they are for stationary use, why bother with the coil and cap hat in the first place? (never mind that placing the coil directly under the cap hat effectivly kills any benefit of a cap hat anyway) It's a stupid design IMHO.
1iwilly, you would do well to go back and read through this thread, as the info that shows exactly why the antenna you showed is a bad design, and why all these guys who purport these things are either uneducated on the subject, or just plain liars.
the 1/2 S unit thing comes from the idea that running a reflector behind your main radiator will reduce the gain in the rear direction and increase the gain in the forward direction.
if this is done exactly right, it is possible to achieve about a 3db gain theoretically.
if the salesman says its because his antennas are superior to others, he is lying.
in fact, i would think that adding those cap hat things on top could really mess with the relationship between the two vertical radiators.
the absolute best way to do this would be with two 102" whips. anything shorter will be a compromise.
its amazing to me how fast these guys who sell to the competition crowd start copying eachother.
one guy starts putting an electrolytic cap in his amps so they all start doing it.
one guy puts a cap hat over a coil because he read the ARRL handbook and sort of understood it, and they all start doing it.
lets all be clear here. a cap hat over a coil is not necessarily a bad design, BUT attention must be paid to the exactly correct placement of the cap hat and the inductance of the coil.
if done correctly, the cap hat can help reduce the resistance of the coil because less inductance is needed which will help reduce the losses.
that is the reason to use a cap hat over a coil.
it will never be as good or better than a 1/4 wave radiator.
LC
the 1/2 S unit thing comes from the idea that running a reflector behind your main radiator will reduce the gain in the rear direction and increase the gain in the forward direction.
if this is done exactly right, it is possible to achieve about a 3db gain theoretically.
if the salesman says its because his antennas are superior to others, he is lying.
in fact, i would think that adding those cap hat things on top could really mess with the relationship between the two vertical radiators.
the absolute best way to do this would be with two 102" whips. anything shorter will be a compromise.
its amazing to me how fast these guys who sell to the competition crowd start copying eachother.
one guy starts putting an electrolytic cap in his amps so they all start doing it.
one guy puts a cap hat over a coil because he read the ARRL handbook and sort of understood it, and they all start doing it.
lets all be clear here. a cap hat over a coil is not necessarily a bad design, BUT attention must be paid to the exactly correct placement of the cap hat and the inductance of the coil.
if done correctly, the cap hat can help reduce the resistance of the coil because less inductance is needed which will help reduce the losses.
that is the reason to use a cap hat over a coil.
it will never be as good or better than a 1/4 wave radiator.
LC
mine have no coil mine are tube inside a tube like a beam element. when tune the rear is like 92 inches long
Ok Guys and Gals its time to pay attention now. im gonna make this very easy for all of us to understand. top hats do work and HELP To LOWER THE ANGLE OF RADIATION , THEREFORE U WILL TALK FURTHER. on your car or suburban it is hard enough to have your 1/4 wave antenna perform like a 1/4 wave . steel whips have to much of a height take off angle, wasted energy going to outerspace. some people are so gun ho about the steel whips , not me unless u got 2 of them in an array with dual hotts with capacitor tuning . a coil in a resonat circuit is the most important part of the antenna for great transmission, is reactance , ears, q factor all of that stuff. capacitor hats work great , ask any real ham thats been in the game for a while ! and egg beater, mickey mouse ears, or even a corona ball will help yes, symetrical shapes will work better to. way to many people bitchin in here and not trying it for themselves. mr coil makes a beautiful antenna , i love em , holds a lot of watts to, and outperforms just about everthing out there. i love the double coil one he makes . i had had every dam antenna on my mobile from 3 wraps to 10 wraps. around 6 foot works the very best overall for one antenna. but the coil is very important ladies and gents for that effiencey that makes the anttena radiate properly .
time to go back on the bench for some real world tests. take a break from the pc for a while, lol lol you guys no who im talking about . lol
time to go back on the bench for some real world tests. take a break from the pc for a while, lol lol you guys no who im talking about . lol
Ok Guys and Gals its time to pay attention now. im gonna make this very easy for all of us to understand. top hats do work and HELP To LOWER THE ANGLE OF RADIATION , THEREFORE U WILL TALK FURTHER. on your car or suburban it is hard enough to have your 1/4 wave antenna perform like a 1/4 wave . steel whips have to much of a height take off angle, wasted energy going to outerspace. some people are so gun ho about the steel whips , not me unless u got 2 of them in an array with dual hotts with capacitor tuning . a coil in a resonat circuit is the most important part of the antenna for great transmission, is reactance , ears, q factor all of that stuff. capacitor hats work great , ask any real ham thats been in the game for a while ! and egg beater, mickey mouse ears, or even a corona ball will help yes, symetrical shapes will work better to. way to many people bitchin in here and not trying it for themselves. mr coil makes a beautiful antenna , i love em , holds a lot of watts to, and outperforms just about everthing out there. i love the double coil one he makes . i had had every dam antenna on my mobile from 3 wraps to 10 wraps. around 6 foot works the very best overall for one antenna. but the coil is very important ladies and gents for that effiencey that makes the anttena radiate properly .
time to go back on the bench for some real world tests. take a break from the pc for a while, lol lol you guys no who im talking about . lol
Horizontal waves travel further and stronger to , thats why we use our capacitor hats !!!!!!!!! :w00t:
First, polarization of the waves has nothing to do with how "far" they travel. It can play into how strong a signal is received in the near field if the other station's polarization is different than your transmitted signal's polarization.
Second, a proper cap hat doesn't change the polarization.
sure it will . 1st depends of the shape, thickness, and how much material is used to make the top hat or cap hat.
2nd how much more resonat is the top hat in relationship to the coil underneath it .
3rd the desired frequency the antenna is made for maximum gain.
now pick 1 out of them , they are all correct .
we are not talking about being polorized we are talking about the angle of radiation becomes lower and talking further with a top hat . dont twist it now son .
HVNJ, first of all, you need to read my last post more carefully.
secondly, referring to the astroplane patent sheet is only going to get you into more trouble.
remember what a patent sheet is, and why they exist.
right there in the patent sheet, the inventor of the astroplane says that substituting the cap hat for a full sized radiator is more efficient.
the ONLY!!!! reason they used a cap hat on that antenna was to gain an extra 4 feet of height on the mast.
that antenna was invented to abide by the 60 foot max height limit and send the signal out from the highest possible point on the antenna.
dont you think if he thought a loading coil would have had any positive effect, he would have used it?
or do you not think that herbert blease knew what he was talking about?
LC
secondly, referring to the astroplane patent sheet is only going to get you into more trouble.
remember what a patent sheet is, and why they exist.
right there in the patent sheet, the inventor of the astroplane says that substituting the cap hat for a full sized radiator is more efficient.
the ONLY!!!! reason they used a cap hat on that antenna was to gain an extra 4 feet of height on the mast.
that antenna was invented to abide by the 60 foot max height limit and send the signal out from the highest possible point on the antenna.
dont you think if he thought a loading coil would have had any positive effect, he would have used it?
or do you not think that herbert blease knew what he was talking about?
LC
sure it will . 1st depends of the shape, thickness, and how much material is used to make the top hat or cap hat.
2nd how much more resonat is the top hat in relationship to the coil underneath it .
3rd the desired frequency the antenna is made for maximum gain.
now pick 1 out of them , they are all correct .
Everything you just said is completely off-base. This debate is getting absurd at this point. It's no different than trying to convince some uneducated, dark ages scientist that the earth really isn't flat.
You're the one that said "horizontal waves travel farther" and that's "why we use a cap hat".
So by your definition you believe that putting a cap hat on a vertical antenna (which has vertical polarization) changes the radiated signal into "horizontal waves", which would be horizontal polarization. Apparently you don't understand the difference between polarization and radiation angle. I'm not twisting anything, but you sure are.
And a cap hat changes none of those things you're talking about.
to be really polorized you would have an 180 degree phase shift correct ???
what i am saying is the top hat changes the take off angle slightly lower compared to a stick straight up antenna. not a complete split in half polorize shift. but the top hat will change it by a difference. i cannot measure the exact angle with some good test devices . try it some time for real.
B
BOOTY MONSTER
Guest
sure it will . 1st depends of the shape, thickness, and how much material is used to make the top hat or cap hat.
2nd how much more resonat is the top hat in relationship to the coil underneath it .
3rd the desired frequency the antenna is made for maximum gain.
now pick 1 out of them , they are all correct .
if the thickness of the entire vertical on a 5/8 affected signal strength then the little wire in a imax would be killed by other 5/8 made of tubing . saying "how much material is used to make the top hat or cap hat" implies that surface area can increase gain ....... it doesn't .
how can a tophat in and of itself be resonate on 27 MHz. without being quite a few feet across ? if it is resonate on 27 MHz why does it need a coil or shaft ?
some will say if you want maximum gain to eliminate any coils or tophats .
- No one is chatting at the moment.