How do you make them? What's the difference between a jPole and a diPole?
Sent from my iPhone
> On Oct 10, 2014, at 1:48 PM, Colin McDonald <[log in to unmask]> wrote:
>
> You may get slightly better performance by putting it out the window.
> That said, if you have aluminum window frames this could cause problems with
> SWR if the metal part of the antenna touches it or is in close proximity.
> There are many antennas that work on most HF bands, however they are very
> large verticals, or very long dipoles.
> For instance, I have a carolina windom wire antenna that is 132 feet long,
> with a 26 foot vertical radiator that hangs down from it.
> I also have a 6 band vertical that covers 80M through 6M that is 12 feet
> long with 6 4 to 5 foot horizontal elements.
> This vertical is more or less useless on 80M and 40, but works OK on 20M,
> 15M and 10M given good band conditions.
> A vertical that performs OK on the lower frequencies would be at least 31
> feet, and usually 43 feet or more if you want to be able to use it
> consistently
> The smallest antenna that would cover most HF bands that I've seen is a
> mobile screw driver type antenna which is about 6FT long...but again, the
> lower frequencies are not usable on it.
>
> Antennas are not expensive if you make them, but can get pricy if you buy
> them.
>
> 73
> Colin, V A6BKX
> --------------------------------------------------
> From: "Joe Quinn" <[log in to unmask]>
> Sent: Friday, October 10, 2014 11:49 AM
> To: <[log in to unmask]>
> Subject: Re: HF antenna fun
>
>> What if you put it out of the window, would it work any better? Also, are
>> th=
>> ere any antennas that work on all hf bands?
>> Also are antennas expensive?
>>
>> Sent from my iPhone
>>
>>> On Oct 10, 2014, at 12:11 PM, Colin McDonald <[log in to unmask]>
>>> wrot=
>> e:
>>> =20
>>> you will get just limited performance on 20M and up in frequency.
>>> You will get basically no performance on bands down in frequency from 20M
>>> o=
>> r=20
>>> 14MHZ
>>> If you have stations very close by on 40 or 80/75M you may be able to=20
>>> participate in round tables...again, if they are very close indeed...as
>>> in=
>> ,=20
>>> within 2 or 3 miles
>>> If band conditions are extremely good, you may make an occasional contact
>>> o=
>> n=20
>>> 20M, 15M or 10M bands.
>>> You will have RFi issues, and you will have noise problems making
>>> receivin=
>> g=20
>>> difficult at best.
>>> Not trying to discourage you at all, but you need to be aware of the
>>> sever=
>> e=20
>>> limitations of an indoor apartment style HF antenna.
>>> They very seldom work for anything other than limited receiving on HF.
>>> Mo=
>> st=20
>>> guys who use HF in an apartment can get the antenna outside on the
>>> balcony=
>> =20
>>> or something...this at least gets the radiator outside the building.
>>> The=20=
>>
>>> building is full of metal and all sorts of stuff that blocks RF from
>>> getti=
>> ng=20
>>> in or out, along with electronics that create high noise level on
>>> receive=20=
>>
>>> making it difficult to copy stations.
>>> I had limited success using a hamstick style mono-band mobile antenna=20
>>> clamped to the balcony railing on the fourth floor for a couple years.
>>> It got me on 20M and 40M, but barely... I didn't make any contacts at
>>> all=20=
>>
>>> unless the band conditions were very very good.
>>> Unfortunately, this is one of those things where there is no way
>>> around=20=
>>
>>> it...the wheel has been invented, and reinvented on indoor HF antennas
>>> and=
>> =20
>>> while manufacturers still make them and claim all sorts of fantastic=20
>>> results, at the end of the day, they just don't work well.
>>> That said, if you are located on the beech in florida or some other
>>> south=20=
>>
>>> eastern State, you may find you have reasonable performance even with
>>> an=20=
>>
>>> indoor antenna. Angle of radiation, propagation and other factors come
>>> in=
>> to=20
>>> play making the circumstances more conducive to success.
>>> That said, the best part about ham radio is that if you try something,
>>> you=
>> =20
>>> may find you have results that don't match up to the accepted theory
>>> or=20=
>>
>>> experience of others.
>>> So, try it and see what happens.
>>> Another antenna to check out might be the MFJ loop antenna...a bit
>>> more=20=
>>
>>> money, but they work well even inside buildings, at least better than
>>> your=
>> =20
>>> typical vertical.
>>> =20
>>> 73
>>> Colin, V A6BKX
>>> --------------------------------------------------
>>> From: "Joe Quinn" <[log in to unmask]>
>>> Sent: Friday, October 10, 2014 10:17 AM
>>> To: <[log in to unmask]>
>>> Subject: Re: HF antenna fun
>>> =20
>>>> Mfj1622 apartment antenna, lest you see something better
>>>> =20
>>>> Sent from my iPhone
>>>> =20
>>>>> On Oct 10, 2014, at 10:20 AM, Jim Shaffer <[log in to unmask]> wrote:
>>>>> =20
>>>>> I see a bunch of antennas here. Specifically, what antenna is it?
>>>>> =20
>>>>> -----Original Message-----=20
>>>>> From: Joe Quinn
>>>>> Sent: Friday, October 10, 2014 10:00 AM
>>>>> To: [log in to unmask]
>>>>> Subject: Re: HF antenna fun
>>>>> =20
>>>>> Here's the link, tell me what you think=3D20
>>>>> http://www.mfjenterprises.com/Product.php?productid=3D3DMFJ-1622
>>>>> =20
>>>>> Sent from my iPhone
>>>>> =20
>>>>>> On Oct 10, 2014, at 9:24 AM, Butch Bussen <[log in to unmask]>
>>>>>> wrote=
>> :
>>>>>> =3D20
>>>>>> I didn't see a link to your antenna. Keep in mind, anything smaller
>>>>>> is=3D20=3D
>>>>> =20
>>>>>> a compromise antenna. Not to say it is bad, just be ware. A dummy
>>>>>> load=3D20=3D
>>>>> =20
>>>>>> will load up on all bands, but doesn't radiate worth a damn. I had
>>>>>> one=3D20=3D
>>>>> =20
>>>>>> of those b and w 160 through ten antennas, looked goot on swr meter,
>>>>>> but=3D20=3D
>>>>> =20
>>>>>> was a very poor performer. It is basicly a folded dipole, 50 foot or
>>>>>> so=3D20=3D
>>>>> =20
>>>>>> each side of center, right above the center insolator or balon is=3D20
>>>>>> another box which is actually a resister which is why it matched
>>>>>> so=3D2=
>> 0
>>>>>> well. I called it my dummy load with wires. I'd ask about
>>>>>> putting=3D2=
>> 0
>>>>>> something up out side and go from there. Can you get any local hams
>>>>>> or=3D20=3D
>>>>> =20
>>>>>> club involved to lend you a hand to see what might be done?
>>>>>> 73
>>>>>> Butch
>>>>>> WA0VJR
>>>>>> Node 3148
>>>>>> Wallace, ks.
>>>>>> =3D20
>>>>>> =3D20
>>>>>> On Thu, 9 Oct=3D20
>>>>>> 2014, Alan R. Downing wrote:
>>>>>> =3D20
>>>>>>> Hello Joe, Don't get your hopes up too high for this indoor HF
>>>>>>> antenna=
>> .
>>>>>>> I=3D
>>>>> =20
>>>>>>> think that it is highly doubtful that an antenna that small can work
>>>>>>> very=3D
>>>>> =20
>>>>>>> efficiently. In addition to poor performance, keep your eye open for
>>>>>>> interference. When you transmit on this small antenna, you run
>>>>>>> the=20=
>>
>>>>>>> risk
>>>>>>> o=3D
>>>>> f
>>>>>>> getting into all many of electronics, not only in your apartment,
>>>>>>> but=20=
>>
>>>>>>> in
>>>>>>> neighboring units. Keep us posted on how you do.
>>>>>>> =3D20
>>>>>>> =3D20
>>>>>>> Alan/KD7GC
>>>>>>> =3D20
>>>>>>> =3D20
>>>>>>> =3D20
>>>>>>> Alan R. Downing
>>>>>>> Phoenix, AZ
>>>>>>> =3D20
>>>>>>> -----Original Message-----
>>>>>>> From: For blind ham radio operators
>>>>>>> [mailto:[log in to unmask]
>>>>> ]
>>>>>>> On Behalf Of Joe Quinn
>>>>>>> Sent: Thursday, October 09, 2014 9:49 PM
>>>>>>> To: [log in to unmask]
>>>>>>> Subject: HF antenna fun
>>>>>>> =3D20
>>>>>>> I found an antenna that will work inside my apartment. It says
>>>>>>> it'll=
>>
>>>>>>> wo=3D
>>>>> rk
>>>>>>> f=3D3D
>>>>>>> rom 40-10 meters on hf and six and 2 meters on vhf. It's not huge, so
>>>>>>> I=
>>
>>>>>>> c=3D
>>>>> an
>>>>>>> p=3D3D
>>>>>>> ut it outside my window or even indoors clamping it to the desk. What
>>>>>>> I=
>>
>>>>>>> woul=3D3D
>>>>>>> d like to know, is if there is another antenna that would work
>>>>>>> below,=20=
>>
>>>>>>> or
>>>>>>> i=3D
>>>>> s
>>>>>>> i=3D3D
>>>>>>> t above, 40 meters but that wouldn't be huge, so it would work from
>>>>>>> insid=3D
>>>>> e
>>>>>>> m=3D3D
>>>>>>> y apartment. I don't know that I would be able to get permission from
>>>>>>> the=3D
>>>>> =20
>>>>>>> ma=3D3D
>>>>>>> nager to be able to hang out a 60 foot or whatever antenna outside
>>>>>>> of=20=
>>
>>>>>>> my
>>>>>>> apa=3D3D
>>>>>>> rtment window. :-) but I want to be able to work as many HF bands as
>>>>>>> I=
>>
>>>>>>> ca=3D
>>>>> n.
>>>>>>> A=3D3D
>>>>>>> nybody have any ideas?=3D3D
>>>>>>> =3D20
>>>>>>> =3D20=20
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