(Dxluver) wrote in message ...
The main reason I like to keep it on the group is if I lay a clam,
someone will usually correct me.

huh, OK.

Yea... As an example, the other day I said a pancake loop's nulls
were at right angles compared to a solenoid loop. The reason I said
this, was I saw it mentioned on a web page somewhere. But after
thinking about it more, I'm not so sure that is correct. Seems to me,
they should act the same as a solenoid loop as far as null direction,
being they are both "small loops". But I'm not sure...All my current
loops are solenoid. Any comments from any pancake loop owners? Are the
nulls broadside to the loop, as in a solenoid loop? Or opposite?
I do know a ferrite bar antenna is opposite from a solenoid loop. BTW,
I just built a new bigger loop yesterday. It's a diamond loop appx 43
inches per side.
It's 5 ft across at the spreaders. Built it from PVC and is a simple
cross frame. I have it in the room with me, and it's rotatable on a
stand like my 16 inch loop. It's working real good so far. It does
give a lot more voltage than the small loop. About 2 s units worth on
average. Will be good for weak signals in quiet cdx. Good for LW too,
being it's pretty big. Started out with 7 turns, but ended up with 5.
I couldn't tune 160m at first. I'm using two variable caps, one appx
850 pf?, and one that is maybe 50 pf or less full mesh, and two sets
of fixed capacitance to tune from 250 cycles to about 2.5 mhz. On the
high end, I'm using very small capacitance values. In fact, I had to
take a 3 150 pf?? "guessing" piece variable, and only use one section
for those upper freqs. The balance came out as good as my other one,
and about equal or better nulls. Using a one turn coupling loop inside
the tank coil. The nulls seem even and the same either side. Thats
what you really want to see. If they slew off from actual direction,
or are unequal , you know you have a balance problem.
MK

RHF , have you tested this antenna over a australian loop?

MY asutralian loop ( ie a 1 x 1 sqm x 7 woulnds ) ofered possibly more
than 30 db gain [i have not any ability to measure the signal level !)
] over the standard radio loop no matter which is ( degen 1102 , Khibo
C300 , Bolong and other poket radios I use)
I could listen in mid day ( 3-5 LT) in Thessaloniki N Greece even a
french station on ca. 600 kHz with 500 kW

On 1 Mar 2004 13:35:31 -0800, (RHF) wrote:

"B
BA,

Check-Out the "Select-A-Tenna" (SAT) Model 541-M

SAT= http://www.selectatenna.com/

"This is the second generation of Select-A-Tenna. It has the
same intrinsic +30dB signal strength improvement and features
as the basic 541 model. In addition, a jack on the front panel
allows the unit to be connected to either an outside long wire
and ground, or as an alternative, directly connected to a
radio's antenna and ground terminals when the radio has no
internal ferrite rod antenna."

iane ~ RHF

.

.

RHF , have you tested this antenna over a australian loop?

MY asutralian loop ( ie a 1 x 1 sqm x 7 woulnds ) ofered possibly more
than 30 db gain [i have not any ability to measure the signal level !)
] over the standard radio loop no matter which is ( degen 1102 , Khibo
C300 , Bolong and other poket radios I use)
I could listen in mid day ( 3-5 LT) in Thessaloniki N Greece even a
french station on ca. 600 kHz with 500 kW

On 1 Mar 2004 13:35:31 -0800, (RHF) wrote:

"B
BA,

Check-Out the "Select-A-Tenna" (SAT) Model 541-M

SAT= http://www.selectatenna.com/

"This is the second generation of Select-A-Tenna. It has the
same intrinsic +30dB signal strength improvement and features
as the basic 541 model. In addition, a jack on the front panel
allows the unit to be connected to either an outside long wire
and ground, or as an alternative, directly connected to a
radio's antenna and ground terminals when the radio has no
internal ferrite rod antenna."

iane ~ RHF

.

.

ZL,

I have made several Loop Antennas in the One Meter Square Size range.

IIRC: Two Loops one smaller and the other larger; that are
built with the same care and materials would have the same
'relative' Gain with respect to their Peak Signal and ability
to Null a Signal. (Both Loop Antennas would have about the
same "Q" Number.)

AUSTRALIAN ONE METER SQUARE Loop Antenna = 10,000 cm Sq.
A larger Loop Antenna has a greater Signal Capture Area and
usually this results in a higher Signal Outout.
* The Australian 1 Metre Loop from Hard-Core-DX.Com
- by Werner Funkenhauser
http://www.hard-core-dx.com/nordicdx...op/1mloop.html
* Bigger Image of the "Australian 1 Metre Loop"
http://www.hard-core-dx.com/nordicdx...op/rnloop1.gif
* The One Meter (3-4Ft) Loop Antennas all perform really good,
but they are big and need a lot of space to position them and
operate them.

SELECT-A-TENNA [Twelve Inch Round] Loop Antenna = 730 cm Sq.
A smaller Loop Antenna has a small Signal Capture Area and
usually this results in a small Signal Outout.
* Check-Out the "Select-A-Tenna" (SAT) Model 541-M
SAT= http://www.selectatenna.com/
* The smaller Loop Antennas like the Select-A-Tenna perform
very well, plus they are easier to use and simply more portable.

THE NUMBERS: Based upon the above two numbers for the
Australian One Meter Square Loop Antenna -=V=- the
Select-A-Tenna [Twelve Inch Round] Loop Antenna the relative
areas of the Loops are ruffly (10,000/730) 14 to 1. What this
means that the Australian One Meter Square Loop Antenna will
have a Higher Signal Level (Output) and because of it's
greater Signal Capture Area this would result in less apparent
fading of the signal when using it vice the Select-A-Tenna.

RANGE: Estimated usable DXing Ranges of these two Loop Antennas.
* Australian One Meter Square Loop Antenna = 2775 Km (1750 Miles)
* Select-A-Tenna [Twelve Inch Round] Loop Antenna = 750Km (475 Miles)

IMPROVING THE "Q" OF THE LOOPS:
* One thing that can 'improve' the "Q" of a Loop Antenna is to
Replace the wire used in the Loop with LITZ Wire.
* Another thing is to reduce the "Spacing" between the Loop Turns.
The Australian One Meter Square Loop Antenna plans call fo 12mm
(1/2") Spacing you mite try reducing this to 9mm (3/8").

LOOP ANTENNA HELP:
* "Loop Antenna Information Forum" eGroup on YAHOO !
LOOPS= http://groups.yahoo.com/group/loopantennas/
* "Ferrite Rod Antenna Experimenters" eGroup on YAHOO !
http://groups.yahoo.com/group/FerriteRodAntenna/
* "Shortwave SWL Antenna" eGroup on YAHOO !
SWL= http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
..
..
iane ~ RHF
..
Some Say: On A Clear Day You Can See Forever.
http://groups.yahoo.com/group/Shortw...na/message/502
I BELIEVE: On A Clear Night...
You Can Hear Forever and Beyond - The Beyond !
..
..
= = = Zach Liang wrote in message
= = = . ..

RHF , have you tested this antenna over a australian loop?

MY asutralian loop ( ie a 1 x 1 sqm x 7 woulnds ) ofered possibly more
than 30 db gain [i have not any ability to measure the signal level !)
] over the standard radio loop no matter which is ( degen 1102 , Khibo
C300 , Bolong and other poket radios I use)
I could listen in mid day ( 3-5 LT) in Thessaloniki N Greece even a
french station on ca. 600 kHz with 500 kW

On 1 Mar 2004 13:35:31 -0800, (RHF) wrote:

"B
BA,

Check-Out the "Select-A-Tenna" (SAT) Model 541-M

SAT= http://www.selectatenna.com/

"This is the second generation of Select-A-Tenna. It has the
same intrinsic +30dB signal strength improvement and features
as the basic 541 model. In addition, a jack on the front panel
allows the unit to be connected to either an outside long wire
and ground, or as an alternative, directly connected to a
radio's antenna and ground terminals when the radio has no
internal ferrite rod antenna."

iane ~ RHF


..