Loop question
 

I feel about an idiot in asking this, I should know the answer. It is about
some BCB dxing. When I listen to the BCB I can choose between a couple real
affective loops and I'm privy to about as much wire as I feel like rollong out
on the ground, I used a tad over 700 ft. last night.

My question is: Can the wire be used *with* the loop also? I was thinking of
hooking the run of wire to the loop. Will this work? Is there another combo
with the antennas I used for the BCB that I can use to squeeze a little more?

TIA

GO BEARCATS wrote:

I feel about an idiot in asking this, I should know the answer. It is about
some BCB dxing. When I listen to the BCB I can choose between a couple real
affective loops and I'm privy to about as much wire as I feel like rollong out
on the ground, I used a tad over 700 ft. last night.

My question is: Can the wire be used *with* the loop also? I was thinking of
hooking the run of wire to the loop. Will this work? Is there another combo
with the antennas I used for the BCB that I can use to squeeze a little more?

There is a way to phase the loop against the wire, but I'll defer to someone who
has used that technique in BCB dx'ing.

Try a Google on 'loop phasing', that will give you a start.

dxAce
Michigan
USA

http://www.iserv.net/~n8kdv/dxpage.htm

My question is: Can the wire be used *with* the loop also? I was thinking
of
hooking the run of wire to the loop. Will this work? Is there another combo
with the antennas I used for the BCB that I can use to squeeze a little
more?

There is a way to phase the loop against the wire, but I'll defer to someone
who
has used that technique in BCB dx'ing.

Try a Google on 'loop phasing', that will give you a start.

dxAce
Michigan
USA

Geeze Steve, that was quick. ;-) I didn't see why it couldn't be done. On the
one loop, I have two brass screws and I was thinking of #1 running the wire to
the screw on the loop or #2 running the wire to the receiver with the loop
right there. {?}

I'm sure if I tried it that something would come of it. Radio on a lazy susan
with a 30x30 loop connected to the table with maybe the other loop being used
also AND the long run of wire. {?}

Just wanted to know before I go through setting all that up.

Try a Google on 'loop phasing', that will give you a start.

btw, thanks for the google tip

GO BEARCATS wrote:

My question is: Can the wire be used *with* the loop also? I was thinking
of
hooking the run of wire to the loop. Will this work? Is there another combo
with the antennas I used for the BCB that I can use to squeeze a little
more?

There is a way to phase the loop against the wire, but I'll defer to someone
who
has used that technique in BCB dx'ing.

Try a Google on 'loop phasing', that will give you a start.

dxAce
Michigan
USA

Geeze Steve, that was quick. ;-) I didn't see why it couldn't be done. On the
one loop, I have two brass screws and I was thinking of #1 running the wire to
the screw on the loop or #2 running the wire to the receiver with the loop
right there. {?}

I'm sure if I tried it that something would come of it. Radio on a lazy susan
with a 30x30 loop connected to the table with maybe the other loop being used
also AND the long run of wire. {?}

Just wanted to know before I go through setting all that up.

To properly phase the loop you'll need a phasing unit, but I'm sure you'll see
that after doing the Google.

Though I'm certain that hooking the wire up directly somehow it will have an
effect upon reception.

dxAce

GO BEARCATS wrote:


My question is: Can the wire be used *with* the loop also? I was thinking
of hooking the run of wire to the loop. Will this work? Is there another
combo with the antennas I used for the BCB that I can use to squeeze a
little more?


I am confused as to how you are coupling the loops to your radio?

Are you using a communications receiver or a portable? Are you coupling a
tuned loop with only the primary winding to a portable via inductive
coupling and rotating the pair on a lazy susan?

Yes, a loop can be phased against a long wire or beverage/BOG type antennas.

A loop used for phasing against another antenna must be a broadband loop,
usually an amplified untuned loop or a Q-spoiled loop. The sharpness of the
traditional box loop's tuning causes a gain change across it's passband
that makes it impossible to use the effects of the phaser to properly
cancel out the target signal you are trying to eliminate. Because of the
high Q of the box loop, the gain across the narrow passband is not uniform.
This causes the phaser to null out the carrier of the target station and
not fully null the sidebands, leaving the Donald-Duck sound of an SSB
signal remaining.

Q-spoiling on the loop eliminates this issue at a slight penalty in
sensitivity.

Some commercial ferrite loops have a switch to broaden the tuning to allow
correct operation with a phaser.

Rick Kunath