225ft from any noise source. Great .Let's see. I could buy the 3 homes
across the street, 3 behind me, and the homes on either side, then tear
them all down. So that's 8 homes at about $650k each, or $5.2 million.

No, I think it's better to spend a bit more and get the Wellbrook.


Mark S. Holden wrote:
wrote:
The LF looks like an amplified whip. I seriously doubt it would be in
the Wellbrook league. Those amplified whip are really noisy, especially
at lower frequencies.

Maybe in the Mojave you can get away with an amplified whip.



The trick with a whip is putting it in a low noise location.

My random wire at home is at least 225 feet away from any source of rfi.
An H800 or H900 would work fine back there.

I use an active whip for camping trips and vacations - largely because
they're easy to transport and set up. The one I'm using now is a 3
meter whip that folds like a tent pole with an impedance matching
transformer, and a milspec Avantek low noise high gain amp.

Obviously it's easy to find a quiet spot for an antenna when you're in
the woods.

Fortunately, it's also easy for me to set up an antenna in a low noise
location at the three places I tend to go for vacations and weekend
getaways - and they're good places for swl - perhaps because they're all
on or very near water.

Or maybe you have the space for, say, a 100 ft wire? The Wellbrook is a
great antenna, so long as you find a quiet spot for it. In general,
though, I would trade it for 100 ft of wire in a quiet location.

I've run my radio from a gelcell where the closest noise source is the
farting of one of those poor cows that live in the high desert. I've
done the long wire, long wire plus Palomar magentic balun, and the
Wellbrook, all in the same "dxpedition." It's not even a contest. The
Wellbrook is much quieter. Finding trees worth a damn to string an
antenna in the high desert isn't easy. I had to go to a spot that had
those junipers you see around the 6000ft level. BTW, I used ceramic
insulators for both long wire setups.

Somewhere around 40 to 60ft of wire on the Wellbrook ALA 100 is the
magic spot.


wrote:
Or maybe you have the space for, say, a 100 ft wire? The Wellbrook is a
great antenna, so long as you find a quiet spot for it. In general,
though, I would trade it for 100 ft of wire in a quiet location.

Ah, the ALA-100...I don't have any first hand experience with the 100.
I would expect it to be a better performer than the 330S, though, since
it's Wellbrook's "large aperture" antenna. I suspect it would be better
than an ordinary random wire. Sounds like fun.

wrote:
I've run my radio from a gelcell where the closest noise source is the
farting of one of those poor cows that live in the high desert. I've
done the long wire, long wire plus Palomar magentic balun, and the
Wellbrook, all in the same "dxpedition." It's not even a contest. The
Wellbrook is much quieter. Finding trees worth a damn to string an
antenna in the high desert isn't easy. I had to go to a spot that had
those junipers you see around the 6000ft level. BTW, I used ceramic
insulators for both long wire setups.

Somewhere around 40 to 60ft of wire on the Wellbrook ALA 100 is the
magic spot.


wrote:
Or maybe you have the space for, say, a 100 ft wire? The Wellbrook is a
great antenna, so long as you find a quiet spot for it. In general,
though, I would trade it for 100 ft of wire in a quiet location.

The ALA100 is a roll your own Wellbrook. They sell the amp, you come up
with the wire.

I've run one ALA 100 scheme with a suare loop 11ft on the diagonal.
Obviously not suitable for indoor use. I have a wire holding scheme now
that uses a 5 ft on the diagonal form with 3 loops of wire. The
performance is quite good. This seems to be all the inductance the ALA
100 can handle. I think you get a LC filter with the ALA100, with the C
of the amp and the L of the wire. Too much inductance will put the
resonance in the HF band.

This 3 loop scheme gets good perfrmance on AFN out of Hawaii, though
the noise is higher than I care for. I think another turn or two would
do the trick, but I have to compute the requires "depth" of the coil to
keep the inductance the same as the 3 loop scheme. A larger loop is
generally the best solution if you have the space as it has the least
self inductance (no mutual term).

I had thought the null woould be worse with multiple turns. I don't
believe this is the case. In fact, the null is sharper, which actually
makes it harder to find the null.


wrote:
Ah, the ALA-100...I don't have any first hand experience with the 100.
I would expect it to be a better performer than the 330S, though, since
it's Wellbrook's "large aperture" antenna. I suspect it would be better
than an ordinary random wire. Sounds like fun.

wrote:
I've run my radio from a gelcell where the closest noise source is the
farting of one of those poor cows that live in the high desert. I've
done the long wire, long wire plus Palomar magentic balun, and the
Wellbrook, all in the same "dxpedition." It's not even a contest. The
Wellbrook is much quieter. Finding trees worth a damn to string an
antenna in the high desert isn't easy. I had to go to a spot that had
those junipers you see around the 6000ft level. BTW, I used ceramic
insulators for both long wire setups.

Somewhere around 40 to 60ft of wire on the Wellbrook ALA 100 is the
magic spot.


wrote:
Or maybe you have the space for, say, a 100 ft wire? The Wellbrook is a
great antenna, so long as you find a quiet spot for it. In general,
though, I would trade it for 100 ft of wire in a quiet location.

My yard measures 170 feet,front to back and 60 feet side to side.Or is
it 160 feet front to back and 70 feet side to side? I forget,I did
measure it off a bunch of years ago.Of course I could run an overhead
wire diagonaly from Southeast to Northwest or Southwest to Northeast.I
dont think those two single women next door to me would mind if I ran an
overhead wire from my yard across their yard and I could double the
lenght of overhead wire.Those people who live on the other side,next
door to me probally wouldn't mind either.I could triple the lenght of
overhead wire and I dont think those people who live next door to those
two single women next door to me,two houses down the street from me
would mind all that much either.The possibilities are endless around
here.
cuhulin

Maybe you should ask that sassy gal to help set up your vertical whip!