On Sun, Apr 27, 2014 at 07:04:14PM +0200, Rick - DJ0IP / NJ0IP wrote:
> The Pixel is a RECEIVE-ONLY antenna.
> YES it has a pre-amp.
>
> It does have a built in antenna switch to switch itself out during TX, but I
> don't know if it is fast enough for QSK, or how it is keyed, etc.
>
> Sri but IMO, 500 bucks for a small rx-only loop is a bloody rip-off!
>
> 73 - Rick, DJ0IP
> (Nr. Frankfurt am Main)
Yes, it's receive only. I wouldn't trust the switch either, but as a
failsafe, it's kind of reassuring.
>
>
> -----Original Message-----
> From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of Jim Allen
> Sent: Sunday, April 27, 2014 2:56 PM
> To: Discussion of Ten-Tec Equipment
> Subject: Re: [TenTec] New Jupiter on its Way _ A Few Questions
>
> Do I understand there is a pre-amp on it? If so, wouldn't this mean receive
> only>
>
> 73 de W6OGC Jim Allen
>
>
> On Sat, Apr 26, 2014 at 11:34 PM, <ny6p01@gmail.com> wrote:
>
> > 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@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.
> > > > > >>
> > > > > >>
> > > > > >> _____________________________________________________
> > > > > >> _______________________________________________
> > > > > >> TenTec mailing list
> > > > > >> TenTec@contesting.com
> > > > > >> http://lists.contesting.com/mailman/listinfo/tentec
> > > > > >
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