Rob wrote:
Hi Miso,

I was just making a point for Tekamon. I really like them and know
they are not shielded. I'm hoping to get an ALA-100 for Christmas so I
can experiment with larger loops. It's obvious that Andy has a good
quiet preamp design and this,coupled with a carefully designed balanced
antenna, constitutes the 'magic' inside a Wellbrook.

Rob

I'm not sure if it is just an amp, or a wideband transformer plus an
amp.


wrote:
Rob wrote:
Actually,

I do know what is inside the plastic loop. If you search on Wellbrook
and look at some of the past topics about it, there is one where
someone was asking the shortwave shop (their distributor) about the
indoor plastic loop, and the guy from the shortwave shop replied that
it was flexible and just had wire inside of it, so it could be squished
through narrow openings to the attic, I assume.

Rob

This question keeps popping up on this newsgroup. Wellbrooks are not
shielded.

I still like the ALA100 because you can roll your own antenna.



Telamon wrote:
In article . com,
"Rob" wrote:

Steve wrote:
John Plimmer wrote:
It's just bliss to have that phenomena that Guy describes: when
the noise on the antenna's is so low you start checking to see if
in fact they are connected. It is such a joy to hear stations
thousand's of miles away waft in over the airwaves as clear as a
bell, yet the signal strength is so low it doesn't even move your
"S" meter. What a thrill!


It's a pity these sorts of locations are so few and far between. In
most locations, atmospheric noise is significant *all by itself*.

I think it was Seein-I-Dawg who commented about the Wellbrook ALA-1530
being shielded....

That was a mistake. That Troll usually posts off topic political crap.

As far as I can tell, having looked at their site several times,
Wellbrook makes no such claims and points to the loop configuration
as the reason why it rejects some near field RFI.

The loop configuration is a reason that the antenna design will be
helpful in reducing local interference.

This is also born out by the fact that they also sell an Indoor
version of the antenna which is packaged in a sort of plastic hula
hoop, rather than in Aluminum tubing.

You and I both do not know what is inside the plastic tubing. It might
be shielded or it may not.

Wellbrook does make a very nice preamp and I suspect that the ALA-100
WILL outperform the ALA-1530 and the ALA-330s with 50 feet of wire on
it. (I currently have an ALA-1530 and hope to have an ALA-100
shortly so I'll let you know.)

Externally the antenna design is good way to go but it would depend on
how it was executed.

--
Telamon
Ventura, California

Oh, I'm sure there are transformers. Many of the best preamps include
them and there may be input and output transformers for impedance
matching and isolation as well.

Rob


wrote:
Rob wrote:
Hi Miso,

I was just making a point for Tekamon. I really like them and know
they are not shielded. I'm hoping to get an ALA-100 for Christmas so I
can experiment with larger loops. It's obvious that Andy has a good
quiet preamp design and this,coupled with a carefully designed balanced
antenna, constitutes the 'magic' inside a Wellbrook.

Rob

I'm not sure if it is just an amp, or a wideband transformer plus an
amp.


wrote:
Rob wrote:
Actually,

I do know what is inside the plastic loop. If you search on Wellbrook
and look at some of the past topics about it, there is one where
someone was asking the shortwave shop (their distributor) about the
indoor plastic loop, and the guy from the shortwave shop replied that
it was flexible and just had wire inside of it, so it could be squished
through narrow openings to the attic, I assume.

Rob

This question keeps popping up on this newsgroup. Wellbrooks are not
shielded.

I still like the ALA100 because you can roll your own antenna.



Telamon wrote:
In article . com,
"Rob" wrote:

Steve wrote:
John Plimmer wrote:
It's just bliss to have that phenomena that Guy describes: when
the noise on the antenna's is so low you start checking to see if
in fact they are connected. It is such a joy to hear stations
thousand's of miles away waft in over the airwaves as clear as a
bell, yet the signal strength is so low it doesn't even move your
"S" meter. What a thrill!


It's a pity these sorts of locations are so few and far between. In
most locations, atmospheric noise is significant *all by itself*.

I think it was Seein-I-Dawg who commented about the Wellbrook ALA-1530
being shielded....

That was a mistake. That Troll usually posts off topic political crap.

As far as I can tell, having looked at their site several times,
Wellbrook makes no such claims and points to the loop configuration
as the reason why it rejects some near field RFI.

The loop configuration is a reason that the antenna design will be
helpful in reducing local interference.

This is also born out by the fact that they also sell an Indoor
version of the antenna which is packaged in a sort of plastic hula
hoop, rather than in Aluminum tubing.

You and I both do not know what is inside the plastic tubing. It might
be shielded or it may not.

Wellbrook does make a very nice preamp and I suspect that the ALA-100
WILL outperform the ALA-1530 and the ALA-330s with 50 feet of wire on
it. (I currently have an ALA-1530 and hope to have an ALA-100
shortly so I'll let you know.)

Externally the antenna design is good way to go but it would depend on
how it was executed.

--
Telamon
Ventura, California