This issue has a good antenna article on loop antennas but for some
strange reason the author seems to think it is only a good AMBCB
antenna. This antenna type is excellent for SW also. Depending on what
frequencies you want to the antenna to operate on and the circumference
of the loop you will not need a matching transformer. Closed loop
antennas are generally superior in urban environments with local noise
sources for a number of reasons.

There is also a good article on propagation by Tomas Hood.

--
Telamon
Ventura, California

On Sun, 03 Aug 2008 12:26:26 -0700

Telamon wrote:

This issue has a good antenna article on loop antennas but for some
strange reason the author seems to think it is only a good AMBCB
antenna. This antenna type is excellent for SW also. Depending on what
frequencies you want to the antenna to operate on and the circumference
of the loop you will not need a matching transformer. Closed loop
antennas are generally superior in urban environments with local noise
sources for a number of reasons.

There is also a good article on propagation by Tomas Hood.


Have you heard anything about those hula-hoop sized loops? If I can find a suitable tuning capacitor I might try building one. The directional abilities look useful.



mike


--
__ __ __ __ __ __ __ __
/ /\ / /\ / /\ / /\ / /\ / /\ / /\ / /
/ /\ \/ /\ \/This space for rent/\ \/ /\ \/ /
/_/ \/_/ \/_/ \/_/ \/_/ \/_/ \/_/ \/_/

Densa International_
'Think tanks cleaned cheap'

Due to the insane amount of spam and garbage,
I block all postings with a Gmail, Google Mail,
Google Groups or HOTMAIL address.
I also filter everything from a .cn server.

http://improve-usenet.org/

On Aug 4, 2:36*am, m II wrote:
On Sun, 03 Aug 2008 12:26:26 -0700

Telamon wrote:
This issue has a good antenna article on loop antennas but for some
strange reason the author seems to think it is only a good AMBCB
antenna. This antenna type is excellent for SW also. Depending on what
frequencies you want to the antenna to operate on and the circumference
of the loop you will not need a matching transformer. Closed loop
antennas are generally superior in urban environments with local noise
sources for a number of reasons.

There is also a good article on propagation by Tomas Hood.

Have you heard anything about those hula-hoop sized loops? If I can find a suitable tuning capacitor I might try building one. The directional abilities look useful.

mike

--
* *__ * *__ * *__ * *__ * *__ * *__ * *__ * *__
* / /\ */ /\ */ /\ */ /\ */ /\ */ /\ */ /\ */ /
*/ /\ \/ /\ \/This space for rent/\ \/ /\ \/ /
/_/ *\/_/ *\/_/ *\/_/ *\/_/ *\/_/ *\/_/ *\/_/

* * * * * * * *Densa International_
* * * * * *'Think tanks cleaned cheap'

* *Due to the insane amount of spam and garbage,
* *I block all postings with a Gmail, Google Mail,
* *Google Groups or HOTMAIL address.
* *I also filter everything from a .cn server.

* *http://improve-usenet.org/

Build you one Mike. You can't go wrong. Loops IMO are freeking killer-
I only have loops for the BCB. For some some reason I just can't
picture (even though I know it works) using a loop for shortwave. I
have three of them and use two of them all the time- without them
there is NO WAY I could have logged and received the verification
reports I have. What type of capacitor are you looking for? I have one
I am not using.....it's a good one- I forget the specs but I could
find out.

Build you one Mike. You can't go wrong. Loops IMO are freeking killer-
I only have loops for the BCB. For some some reason I just can't
picture (even though I know it works) using a loop for shortwave. I
have three of them and use two of them all the time- without them
there is NO WAY I could have logged and received the verification
reports I have. What type of capacitor are you looking for? I have one
I am not using.....it's a good one- I forget the specs but I could
find out.

I have been flirting with purchasing a Wellebrook SW loop for a year
or two now... does anyone on list have one? Specifically paired with
a Satellit 800 or E1?

,
chevyorange writes:

I have been flirting with purchasing a Wellebrook SW loop for a year
or two now... does anyone on list have one? Specifically paired
with a Satellit 800 or E1?

I received my Wellbrook ALA 1530P (indoor version) a few days ago. My
receiver is a tentec rx320.

I have been using a couple of 'long' wire antennas. One is inside and
runs around a couple of rooms and is about 30m long. The other is
outside but not very high and is about 35m long and connected to a
length of coax. I only use that when I can have a window open. My
house is primarily made of wood so no real problem for internal
antennas.

My interest is SW only (broadcast + amateur and I hope some digital
modes soon).

First thing I noticed with the wellbrook loop is the noise level
dropped by a huge amount. Comparing the signal when listening to SW
broadcast stations with the 3 antennas the wellbrook is far better
overall. The wire antennas are ok for strong broadcast signals but
fading was a real pain because of the high noise level. Listening
to amatuers the wellbrook wins hands down.

I have found little to no affect when I have rotated the loop or even
when I've laid it flat on the floor. I believe that this is more
noticeable on lower frequencies such as MW. I must remember to tune
in to the BBC one 198 KHz sometime.

So far I am very impressed. I'm still moving the loop around to find
the best place for it. I haven't tried it outside yet (it is water
proof so can be used outside).

My only gripe to date is the time it took to be delivered. About 3
weeks and I received no response to email queries as to the status of
my order.

Disclaimer: I am in no way associated with Wellbrook Communications.
My view of the performance of the antenna areis totally subjective.

On Aug 4, 12:54*am, chevyorange wrote:
Build you one Mike. You can't go wrong. Loops IMO are freeking killer-
I only have loops for the BCB. For some some reason I just can't
picture (even though I know it works) using a loop for shortwave. I
have three of them and use two of them all the time- without them
there is NO WAY I could have logged and received the verification
reports I have. What type of capacitor are you looking for? I have one
I am not using.....it's a good one- I forget the specs but I could
find out.

I have been flirting with purchasing a Wellebrook SW loop for a year
or two now... does anyone on list have one? *Specifically paired with
a Satellit 800 or E1?

I've used the ALA100 for I guess 5 years. I won't go back to anything
else. The ALA100 is a DIY box from Wellbrook. They supply the amp, you
supply the loop itself. You need about a 4ftx4ft loop to get the
antenna really cooking. I use copper pipe at home and wire in the
field.

This is a loop I built for use in the field. It is just an umbrella
stand base, PVC, fiberglass tent poles, wire, and of course the
ALA100.
http://www.lazygranch.com/images/radio/loop1.jpg
http://www.lazygranch.com/images/radio/loop2.jpg
http://www.lazygranch.com/images/radio/loop3.jpg
http://www.lazygranch.com/images/radio/loop4.jpg

I have a larger version that uses white fiberglass rods from Tap
Plastics instead of the tent pole rods. I also have a small 2ft by 2ft
loop I use for direction finding.

The key to the Wellbrook loop is "aperture." It needs to occupy a lot
of space if you want the signal to noise level to be high.

I think the ALA100 is the least expensive product they make, or
perhaps this is the case for export use since it is very small. Still,
with the weak dollar, it isn't cheap nowadays.

BCBlazysusan wrote:

Build you one Mike. You can't go wrong. Loops IMO are freeking killer-
I only have loops for the BCB. For some some reason I just can't
picture (even though I know it works) using a loop for shortwave. I
have three of them and use two of them all the time- without them
there is NO WAY I could have logged and received the verification
reports I have. What type of capacitor are you looking for? I have one
I am not using.....it's a good one- I forget the specs but I could
find out.


Thank you for your kind offer but I have a large two or three group
style one buried in the garage somewhere. I think it's under the surplus
signal generators or the box of one milliamp meters or the breadboarding
stations or the ....



mike

--
__ __ __ __ __ __ __ __
/ /\ / /\ / /\ / /\ / /\ / /\ / /\ / /
/ /\ \/ /\ \/This space for rent/\ \/ /\ \/ /
/_/ \/_/ \/_/ \/_/ \/_/ \/_/ \/_/ \/_/

Densa International©
'Think tanks cleaned cheap'

Due to the insane amount of spam and garbage,
I block all postings with a Gmail, Google Mail,
Google Groups or HOTMAIL address.
I also filter everything from a .cn server.

http://improve-usenet.org/

On Tue, 05 Aug 2008 15:05:44 GMT, m II wrote:

BCBlazysusan wrote:

Build you one Mike. You can't go wrong. Loops IMO are freeking killer-
I only have loops for the BCB. For some some reason I just can't
picture (even though I know it works) using a loop for shortwave. I
have three of them and use two of them all the time- without them
there is NO WAY I could have logged and received the verification
reports I have. What type of capacitor are you looking for? I have one
I am not using.....it's a good one- I forget the specs but I could
find out.


Thank you for your kind offer but I have a large two or three group
style one buried in the garage somewhere. I think it's under the surplus
signal generators or the box of one milliamp meters or the breadboarding
stations or the ....

stockpile of Chinese ammunition???

On Tue, 05 Aug 2008 18:52:27 -0700

Thank you for your kind offer but I have a large two or three group
style one buried in the garage somewhere. I think it's under the
surplus signal generators or the box of one milliamp meters or the
breadboarding stations or the ....

stockpile of Chinese ammunition???

No ammo here. You're confusing me with dxAce. He buys the stuff in 10
thousand round case lots and hides it in the crawl space below the
house. The FBI is looking into his profile as we speak.



mike

--
__ __ __ __ __ __ __ __
/ /\ / /\ / /\ / /\ / /\ / /\ / /\ / /
/ /\ \/ /\ \/This space for rent/\ \/ /\ \/ /
/_/ \/_/ \/_/ \/_/ \/_/ \/_/ \/_/ \/_/

Densa International_
'Think tanks cleaned cheap'

Due to the insane amount of spam and garbage,
I block all postings with a Gmail, Google Mail,
Google Groups or HOTMAIL address.
I also filter everything from a .cn server.

http://improve-usenet.org/

On Aug 3, 11:36*pm, m II wrote:
On Sun, 03 Aug 2008 12:26:26 -0700

Telamon wrote:
This issue has a good antenna article on loop antennas but for some
strange reason the author seems to think it is only a good AMBCB
antenna. This antenna type is excellent for SW also. Depending on what
frequencies you want to the antenna to operate on and the circumference
of the loop you will not need a matching transformer. Closed loop
antennas are generally superior in urban environments with local noise
sources for a number of reasons.

There is also a good article on propagation by Tomas Hood.

- Have you heard anything about those hula-hoop sized loops?
- If I can find a suitable tuning capacitor I might try building one.
- The directional abilities look useful.
-
- mike

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stay-tuned & in-the-loop - iane ~ RHF {pomkia}