[TenTec] New Jupiter on its Way _ A Few Questions

Sun Apr 27 00:34:57 EDT 2014

On Sat, Apr 26, 2014 at 09:32:41PM -0500, Jim Allen wrote:
> It doesn't look to me like any of the Pixel products are for amateur use,
> not for transmitting anyway.
> 
> Am I missing a product from their website?
> 
> 73 d W6OGC  Jim Allen

Their RF-Pro 1B is very popular with SWLs and hams.

> 
> 
> On Sat, Apr 26, 2014 at 9:25 PM, <ny6p01 at gmail.com> wrote:
> 
> > On Sun, Apr 27, 2014 at 09:56:36AM +1000, Richard Tschur wrote:
> > > Hi all,
> > > a really good quality magnetic loop is available from Kaeferlein in
> > > Germany! I have one with 80cm in diameter and it can handle up to
> > > 500Watts and it performs really well. They are not cheap, but they do
> > > perform. I bought mine used years ago for like 300 german Marks (good
> > > old times;-)), and i had great contacts on it. For example, the antenna
> > > was mounted about 50 cm above ground between the houses and i had a
> > > contact from Melbourne VK to Italy with 100 watts. But the important
> > > thing is, from what I've been told, no joins, one loop out of aluminium
> > > with at least 33mm diameter. This Kaeferlein guy is sort of a pioneer
> > > with loops, he made them for decades. Just my take on them, so if you
> > > have no space, go for a good quality loop, you can put them nearly
> > > everywhere, in the garage, in the basement, height is not really
> > > critical, from what I have experienced. Just my take on it. Here is the
> > > link to Kaeferleins web side
> > > www.ama-antennen.de
> > > Unfortunately only in german, but I think pretty much self explaining.
> > > I forgot to mention: the loop I have covers 13.5 to 30 MHz. I have
> > > another one from DJ0HV, he makes sort of homebrew semi comercial, this
> > > one is 2 m in diameter and covers 80 to 20 m and can handle up to 1 kw.
> > > The aluminium pipe is 60mm in diameter. Both of them are fully remote
> > > controllable! The only disadvantage in my opinion is, you have to retune
> > > every like 15 to 30 KHz, if you transmit, but you get a very selective
> > > and quiet antenna and in comparison with a dipol, it is maybe half to an
> > > s point lower! An that, you can compensate with a bit of juice behind
> > > the antenna ;-)!
> > >
> > > Regards and greetings from Down here
> > > Richard VK3KVK / DK3KVK
> > >
> >
> > Good cite. Here in the U.S., Pixel makes them with all the bells and
> > whistles for about 500., but I'm not interested in them for that reason. I
> > want a receiving antenna that can null out or reject all the QRN in my
> > area.
> > For this, the mag loop is perfect, and doesn't need the heavy duty
> > treatment
> > of a transmitting loop.
> >
> > >
> > >
> > > On 27/04/14 06:49, Rockinghorse Winner (Terry) wrote:
> > > > K8JHR wrote:
> > > >> I have used the Wellbrook ALA-100M receiving loop for over a decade
> > > >> with good results at two locations.  It is a "medium or large
> > > >> aperture" loop, because you supply whatever size wire loop you want.
> > > >> I used mine outside, but you could do it inside, but of course it
> > > >> tends to be more RF quiet the farther you get away from your
> > > >> dwelling.  Wellbrook also makes a model that uses a 1 meter alum
> > > >> loop, which works well indoors. The loop does not have to be round or
> > > >> symmetrical, and you can use very light litz wire which is nearly
> > > >> invisible outside.  They can also be used indoors, as in an attic,
> > > >> but you don't want to be listening on it when you are transmitting on
> > > >> it, if you cannot locate it at least 1/4 to 1/2 wavelength away from
> > > >> the transmitter antenna (which applies to all receive only antennas I
> > > >> suppose.)  These work on the magnetic portion of the electromagnetic
> > > >> waves we work with, as does Rick's project.
> > > >>
> > > >> See The Wellbrook products here:
> > > >>
> > > >> http://www.wellbrook.uk.com/antennashop/
> > > >>
> > > >>
> > > >> I have also used a DX-Engineering active whip with good results. I
> > > >> have mine in the front yard, away from the transmitting antennas in
> > > >> the back yard, and it has a very low profile.  These work on the
> > > >> electrical portion of the electromagnetic waves we work with. They
> > > >> have a single vertical whip model, and a dipole model, and you can
> > > >> see them here:
> > > >>
> > > >> single vertical model:
> > > >>
> > > >> http://www.dxengineering.com/parts/dxe-arav3-1p
> > > >>
> > > >> dipole model:
> > > >>
> > > >> http://www.dxengineering.com/parts/dxe-arah3-1p
> > > >>
> > > >>
> > > >> I have used both the Wellbrook loop and the DX-E active whip with
> > > >> good results as receive only HF antenna on my small suburban lot,
> > > >> although they are substantially more expensive than Rick's home brew
> > > >> project.  I know several SWL's who have built similar loops to Rick's
> > > >> project, with good results. It is a classic.
> > > >>
> > > >> I went to the Wellbrook site. But the antenna you cited was 60" in
> > > >> diameter, too large for my room. Did you say they had some smaller
> > > >> loops? In any case, I'm going to try to build a receive mag loop
> > > >> according to the instructions Rick provided. It seems like a straight
> > > >> forward project that should take a few hours at most.
> > > >
> > > >> Happy trails.
> > > >> ----------------------  K8JHR  -----------------------
> > > >>
> > > >>
> > > >>
> > > >> On 4/25/2014 6:05 PM, Jim Allen wrote:
> > > >>> You might also consider the helically loaded loops that K8NDS has
> > been
> > > >>> developing.
> > > >>
> > > >>
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