Mike Cizek W3MC
ko...@toad.net
I've used both. The performance is about the same. But the Stealth by Vortex is
a much beefier antenna; its decidedly more robust.
K0MB
Hi Mike, WA6JPR's standard bugcatcher scored 4dB better than his antenna
with a stainless steel Fortex coil. The Fortex system scored 6.8dB down
from the top bugcatcher. IMO, don't ever buy a stainless steel loading
coil. It is much more lossy than a plated copper coil like the Texas
Bugcatcher's.
--
73, Cecil, W6RCA, OOTC (not speaking for my employer)
Are they silver-plated stainless steel? If so, how thick is
the silver plating?
thanks & 73, Cecil, W6RCA, OOTC
>don't ever buy a stainless steel loading
>coil. It is much more lossy than a plated copper coil like the Texas
The new Stealth coils address this by using silver plate.
K0MB
>MailfrmPA wrote:
>> The new Stealth coils address this by using silver plate.
>
>Are they silver-plated stainless steel? If so, how thick is
>the silver plating?
>
>thanks & 73, Cecil, W6RCA, OOTC
Hi Cecil, Bart (WB6HQK) had the Fortex system at the Santa
Barbara shootout.
73, Jesse, W6KKT
Hi Jess, did Bart have the silver-plated version? Did Walley
have the non-silver-plated version?
I like the Texas bugcatcher, although many good reports abound on the
better screwdriver designs. Please take a look at
http://people.delphi.com/CecilMoore/shootout.htm
for a recent mobile antenna shootout performed by good folks! And my
experience goes along pretty well with their results.
One note to make though, is that consider the mobile HF antenna SYSTEM -
the vehicle is almost as important as the antenna - bigger ones work better
on the low bands. On 40m it may not be as significant an effect.
73s de K5KH (David)
W3MC <ko...@toad.net> wrote in article
<01bcfe00$3b37d0a0$4c1e...@ko7v.Toadnet>...
> I am looking for a GOOD HF mobile antenna. Is anyone familiar with both
> the Texas Bugcatcher and the Fortex (Vortex?) antennas? Any other big
> signal mobile antennas? Main interest is 40M CW. Thanks.
What are the details of this Fortex antenna (Type, bands-covered,
how tuned i.e. screwdriver etc, size, weight, etc). Do they
have a web site ??
Thanks,
Gene K1NR/3
Hi Cecil;
I think you have it right. The silver could not be thick enough to be
effective on the low bands---you and I couldn't afford it (together) if it was.
The coil should be Hard Drawn Copper or Copper alloy and possibly flash plated
to make it look pretty. SS coils have extremely high losses compared to
copper--they make great hand warmers though!. 73 Bill N4...@aol.com
I got a note from them asking if I would be interested in up-grading my 160
coil/whip, but it didn't get that detailed.
K0MB
N4MXF wrote:
It never ceases to amaze me at the comments made on this news group by those that
have no
actual first hand experience or knowledge of the subject matter under discussion.
First let me point out the fact that it is virtually impossible to plate silver
onto stainless steel or any
other metal for that matter. Where did you folks get the idea that Fortex ever
plated silver over
stainless steel? I agree that stainless is not a great conductor of radio
frequency energy and as such the stainless coil measured low on Q as can be
documented by the resulting lower field
strength measurements.
Jim Blankenship of Fortex stated that his original choice to use stainless steel
for the coil was to
insure that the coil would withstand a beating of unreal proportions. For those of
us out there
that are more interested in top performance he is now producing a silver plated
coil of much
higher Q.
It's base material is made of .071 inch tempered phosphor bronze spring wire to
preserve the ruggedness of the original stainless steel design with .003 inches of
copper flashed over it with yet
another .006 inches of silver on top of the copper!
I had the pleasure of being among the very first to receive Jim's new coil and what
a performer
it has turned out to be. I entered my mobile into a regional shoot-out at
Rhinelander, Wisconsin
last August and cleaned house by a margin of 3.7 db over the second place entry.
My Stealth was retrofitted from the original factory version with the silver coil,
custom built three foot half inch diameter extension mast to elevate the top hat
well above the coil with a short three foot whip to complete the structure. It's
mounted on my 1995 Mercedes E300 with Jim's custom made
mount. The tip of the whip measures 13'-4" above the ground. My installation was
featured in the
November 1997 issue of CQ Magazine.
I don't contend that it will blow away the best of the Santa Barbara competition,
but I am willing
to bet money that I'll not take much of a back seat to any antenna and mobile
installation of similar
design that is practical to drive down the road from coast to coast! It's
performance is hardly
anything representing a hand warmer.
William G. Becks WA8WG
Like you, I'm dismayed by unsupported claims by people who no
little about the subject they are talking about.
In my opinion, the Fortex mobile hardware is the best constructed
and the best looking stuff I have ever seen after forty years of
mobileing. However, it produces no better field strength than any
other well designed, center loaded, home brew, or commercial
"Bugcatcher" type system, which use well designed loading coils.
If indeed you "cleaned house" by producing 3.7 db more gain than
the second place system(you didn't say what it was) you must have
been competing against very poor systems without capacity hats,
which you used. You most certainly were not competing on a equal
playing field. Your Fortex system makes a beautiful installation,
but it produces no magic. A comparable center loaded,high-Q,
home brew or commercial Bugcatcher system using the same size
capacity hat and mobile platform will produce the same signal
strength. To state, your system "cleaned house" and was 3.7 db
better, without detail, borders on sensationalism, wouldn't you
say?
73, Jesse, W6KKT
W6KKT (Jesse) wrote:
> On Wed, 03 Dec 1997 19:36:46 -0500, "William G. Becks"
> <wbe...@sun.lssu.edu> wrote:
>
> <Stuff deleted>
> >My Stealth was retrofitted from the original factory version with the silver coil,
> >custom built three foot half inch diameter extension mast to elevate the top hat
> >well above the coil with a short three foot whip to complete the structure.
> >
> <Stuff deleted>
> >I don't contend that it will blow away the best of the Santa Barbara competition,
> >but I am willing
> >to bet money that I'll not take much of a back seat to any antenna and mobile
> >installation of similar
> >design that is practical to drive down the road from coast to coast!
>
> Like you, I'm dismayed by unsupported claims by people who no
> little about the subject they are talking about.
> In my opinion, the Fortex mobile hardware is the best constructed
> and the best looking stuff I have ever seen after forty years of
> mobileing. However, it produces no better field strength than any
> other well designed, center loaded, home brew, or commercial
> "Bugcatcher" type system, which use well designed loading coils.
>
> If indeed you "cleaned house" by producing 3.7 db more gain than
> the second place system(you didn't say what it was) you must have
> been competing against very poor systems without capacity hats,
> which you used. You most certainly were not competing on a equal
> playing field. Your Fortex system makes a beautiful installation,
> but it produces no magic. A comparable center loaded,high-Q,
> home brew or commercial Bugcatcher system using the same size
> capacity hat and mobile platform will produce the same signal
> strength. To state, your system "cleaned house" and was 3.7 db
> better, without detail, borders on sensationalism, wouldn't you
> say?
> 73, Jesse, W6KKT
No, I wouldn't say! The field albeit smaller than Santa Barbara had a good cross
section
of antennas in which to compare. The field consisted of helical wound verticals, top
loaded
and non top loaded BC's, top loaded and non top loaded screwdrivers, Outbackers,
Hustlers, and various other home brew designs.
The second place antenna was a helical wound vertical with top hat loading. It
produced
a score of -30.8 dbm on the spectrum analyzer used as a field strength meter. My
very
modified Stealth measured -27.08 dbm. All others were below the helical with third
place
going to a home brew BC at -31.5 dbm.
I recognize the excellent effort and work of those that participated in the Santa
Barbara
event. The results of the top performers sets a good example of engineering through
the
application of science. To dispel the black magic and myths the we hear repeatedly
on
the air and in some of our publications and news group postings.
My posting was intended to state first had some facts that were relevant to the
subject of
the new silver coil from Fortex, and to further state my own personal satisfaction
with the
performance increase gained in my own mobile installation.
In the interest of keeping this new group a productive tool in which to learn and to
share
knowledge and information, I ask that we all pledge to keep personal ego's and third
party hearsay out of our postings.
Seasons Greetings to all!
Bill WA8WG
So, after all said, would you care to elaborate technically
(without ego) exactly why your "very modified Stelth" system
outperformed all other mobile systems by 3.7 db or more?
Jesse, W6KKT
--
Charles (Jack) Hawley
Chuck....Ham Radio KE9UW
AKA "Jack" BMW Motorcycles, MOA #224 K100RS
W6KKT (Jesse) wrote:
> On Sun, 07 Dec 1997 16:12:10 -0500, "William G. Becks"
> <wbe...@sun.lssu.edu> wrote:
>
> >
> >
> >W6KKT (Jesse) wrote:
> >
> >> On Wed, 03 Dec 1997 19:36:46 -0500, "William G. Becks"
> >> <wbe...@sun.lssu.edu> wrote:
> >>
> >> <Stuff deleted>
> >
> >> >My Stealth was retrofitted from the original factory version with the silver coil,
> >> >custom built three foot half inch diameter extension mast to elevate the top hat
> >> >well above the coil with a short three foot whip to complete the structure.
> >> >
> >> <Stuff deleted>
> >
> >> >I don't contend that it will blow away the best of the Santa Barbara competition,
> >> >but I am willing
> >> >to bet money that I'll not take much of a back seat to any antenna and mobile
> >> >installation of similar
> >> >design that is practical to drive down the road from coast to coast!
> >>
> >> Like you, I'm dismayed by unsupported claims by people who no
> >> little about the subject they are talking about.
> >> In my opinion, the Fortex mobile hardware is the best constructed
> >> and the best looking stuff I have ever seen after forty years of
> more deleted
Now I'm really wondering.....second place went to a helically wound vertical with top
hat...top hat or not....and last place went to a BC.......
This all sort of flies in the face of all the mobil shootouts I've been to, but is very
interesting. Maybe there is something new to learn after all. Or, maybe it's all due to
construction techniques.
Chuck, KE9UW
c-ha...@uiuc.edu
Sr. Research Engineer Emeritus
University of Illinois, Urbana-Champaign
W6KKT (Jesse) wrote:
> On Sun, 07 Dec 1997 16:12:10 -0500, "William G. Becks"
> <wbe...@sun.lssu.edu> wrote:
>
> >
> >
> >W6KKT (Jesse) wrote:
> >
> >> On Wed, 03 Dec 1997 19:36:46 -0500, "William G. Becks"
> >> <wbe...@sun.lssu.edu> wrote:
> >>
> >> <Stuff deleted>
> >
> >> >My Stealth was retrofitted from the original factory version with the silver coil,
> >> >custom built three foot half inch diameter extension mast to elevate the top hat
> >> >well above the coil with a short three foot whip to complete the structure.
> >> >
> >> <Stuff deleted>
> >
> >> >I don't contend that it will blow away the best of the Santa Barbara competition,
> >> >but I am willing
> >> >to bet money that I'll not take much of a back seat to any antenna and mobile
> >> >installation of similar
> >> >design that is practical to drive down the road from coast to coast!
> >>
> >> Like you, I'm dismayed by unsupported claims by people who no
> >> little about the subject they are talking about.
> >> In my opinion, the Fortex mobile hardware is the best constructed
> >> and the best looking stuff I have ever seen after forty years of
> >> mobileing. However, it produces no better field strength than any
> >> other well designed, center loaded, home brew, or commercial
> >> "Bugcatcher" type system, which use well designed loading coils.
> >>
> >> If indeed you "cleaned house" by producing 3.7 db more gain than
> >> the second place system(you didn't say what it was) you must have
> >> been competing against very poor systems without capacity hats,
> >> which you used. You most certainly were not competing on a equal
> >> playing field. Your Fortex system makes a beautiful installation,
> >> but it produces no magic. A comparable center loaded,high-Q,
> >> home brew or commercial Bugcatcher system using the same size
> >> capacity hat and mobile platform will produce the same signal
Sure,
But then like any other vertical antenna, the vertical is only half of the antenna. The
other half
was not a part of the discussion thread. Do big gun dxers give the farm away?
It would appear from your comments that you alone are the world expert on high frequency
mobile antennas. Myself, I have never claimed to anything other than winning the shootout
in which I was a participant. I don't recall ever posting any finite field strength
performance
data nor claim that the sky was falling!
Get a life.
Bill WA8WG
Hi Bill, FYI, Jess has probably stared at more field strength meters during
mobile antenna shootouts than anybody else I know. You seem to have
deliberately hidden your reason for winning. My guess would be an 18-
wheeler or a camper trailer as a ground plane. Why be so coy? There's no
secret magic involved. If you won the shootout with a Fortex mounted on an
18-wheeler, that is perfectly understandable. BS, like yours above, shows
a certain disregard for the truth. Could it be that same disregard extends
to the results of your shootout? (if there was such a shootout)? Inquiring
minds, like mine and Jess', want to know the truth. If you are unwilling
to share the truth, BUZZ OFF!
73, Cecil, W6RCA, OOTC
> Hi Bill, FYI, Jess has probably stared at more field strength meters during
> mobile antenna shootouts than anybody else I know. You seem to have
> deliberately hidden your reason for winning. My guess would be an 18-
> wheeler or a camper trailer as a ground plane. Why be so coy? There's no
> secret magic involved. If you won the shootout with a Fortex mounted on an
> 18-wheeler, that is perfectly understandable. BS, like yours above, shows
> a certain disregard for the truth. Could it be that same disregard extends
> to the results of your shootout? (if there was such a shootout)? Inquiring
> minds, like mine and Jess', want to know the truth. If you are unwilling
> to share the truth, BUZZ OFF!
>
> 73, Cecil, W6RCA, OOTC
Cecil,
Having gone back over my postings relevant to this thread I am truly
hard pressed to find where I have made any false claims.
I came into this discussion about the Fortex product to provide some actual
facts as to the composition of the silver plated coil because someone made
innuendo that the silver was plated over stainless steel and started stating
new laws of physics.
My statement of being pleased with the quality of the Fortex antenna and
with it's inherent performance were in no way meant to be demeaning
of the Santa Barbara event, you, Jess or anyone else!
Like you folks, I don't subscribe to bull shit artists. On the other hand
however, it's hard to make a statement that mobile antenna systems are
an exact science. I have yet to find a methods of moments modeling
program that can give any degree of high accuracy to any given mobile
antenna model.
You can take a given vehicle and model the body a hundred different
ways and get about as many far field predictions! So at best, It is my
opinion that modeling of mobile antennas is only useful for the relative
comparison of one model to another.
Having stated this and in defense of the harsh accusations from you folks
with "Inquiring Minds", I attribute my success in winning first place in our
little regional shootout in Podunk, USA to having addressed the loss in
not only the vertical itself, but in the other half of the antenna, the ground
system.
Cecil is correct folks. I am guilty of being coy or secretive of certain details.
I was under the impression that these shootouts were done in the sprit of
friendly competitiveness. Having spent a great deal of my life in an attempt
to master certain technical skills, and having put a lot of effort into my mobile
antenna, I am not about to give the farm away!
I am not conceded enough to consider myself a big gun in the art of mobile
antenna competition. It will take a lot of beatings form some of the old timers
and one hell of a lot more events to gain that kind of expertise.
Like you folks with the ever "Inquiring Mind", I would like to see your equations
relevant to the necessity of an 18 wheeler size ground system in order that my
poor little Fortex can radiate a competitive signal!
With all due respect to Cecil and Jess, I feel that this thread has out lived it's
productiveness having become a pissing match. I apologize for the bandwidth
that I have expended contrary to this thread in an attempt to bring in a direct
quote on the coil composition from Jim Blankenship of Fortex.
Flame me if you must, I am done with it!
Sincerely,
Bill WA8WG
William G. Becks wrote:
> Cecil is correct folks. I am guilty of being coy or secretive of certain details.
> I was under the impression that these shootouts were done in the sprit of
> friendly competitiveness. Having spent a great deal of my life in an attempt
> to master certain technical skills, and having put a lot of effort into my mobile
> antenna, I am not about to give the farm away!
There are some who like you tend to be coy or secretive........but most of us want to
increase our understanding and help others to do the same. That is why I like ham radio.
Charles (Jack) Hawley
Chuck....Ham Radio KE9UW
AKA "Jack" BMW Motorcycles, MOA #224 K100RS
Wife rides...Viki, MOA #18120 K100RS
President IBMWR
Hi Cecil,
You have to give Mr. Bill a break when one pays WAY TOO much for
something one tends to be a bit a bit defensive about the purchase.
Perhaps Mr. Bill would like to show up in NM next Fall to show us what
he's got. How does Columbus Day weekend hit you guys. Any later than
that we run the risk of snow. I'll be sure to put ol' Bill on the email
list for the National Shootout.
CUL 73 de Jerry
You enter this forum admonishing us to avoid ego, then you proceed to
exhibit it in a most unseemly manner. Cecil's right, if you aren't here to
participate in open discussion of how to do things, BUZZ OFF.
Gary
Gary Coffman KE4ZV | You make it |mail to ke...@bellsouth.net
534 Shannon Way | We break it |
Lawrenceville, GA | Guaranteed |
>
>
>
>> Hi Bill, FYI, Jess has probably stared at more field strength meters during
>> mobile antenna shootouts than anybody else I know. You seem to have
>> deliberately hidden your reason for winning. My guess would be an 18-
>> wheeler or a camper trailer as a ground plane. Why be so coy? There's no
>> secret magic involved. If you won the shootout with a Fortex mounted on an
>> 18-wheeler, that is perfectly understandable. BS, like yours above, shows
>> a certain disregard for the truth. Could it be that same disregard extends
>> to the results of your shootout? (if there was such a shootout)? Inquiring
>> minds, like mine and Jess', want to know the truth. If you are unwilling
>> to share the truth, BUZZ OFF!
>>
>> 73, Cecil, W6RCA, OOTC
>
> Cecil,
>
> Having gone back over my postings relevant to this thread I am truly
> hard pressed to find where I have made any false claims.
>
> I came into this discussion about the Fortex product to provide some actual
> facts as to the composition of the silver plated coil because someone made
> innuendo that the silver was plated over stainless steel and started stating
> new laws of physics.
>
> My statement of being pleased with the quality of the Fortex antenna and
> with it's inherent performance were in no way meant to be demeaning
> of the Santa Barbara event, you, Jess or anyone else!
>
> Like you folks, I don't subscribe to bull shit artists. On the other hand
> however, it's hard to make a statement that mobile antenna systems are
> an exact science. I have yet to find a methods of moments modeling
> program that can give any degree of high accuracy to any given mobile
> antenna model.
>
> You can take a given vehicle and model the body a hundred different
> ways and get about as many far field predictions! So at best, It is my
> opinion that modeling of mobile antennas is only useful for the relative
> comparison of one model to another.
>
> Having stated this and in defense of the harsh accusations from you folks
> with "Inquiring Minds", I attribute my success in winning first place in our
> little regional shootout in Podunk, USA to having addressed the loss in
> not only the vertical itself, but in the other half of the antenna, the ground
> system.
>
> Cecil is correct folks. I am guilty of being coy or secretive of certain details.
> I was under the impression that these shootouts were done in the sprit of
> friendly competitiveness. Having spent a great deal of my life in an attempt
> to master certain technical skills, and having put a lot of effort into my mobile
> antenna, I am not about to give the farm away!
>
> I am not conceded enough to consider myself a big gun in the art of mobile
> antenna competition. It will take a lot of beatings form some of the old timers
> and one hell of a lot more events to gain that kind of expertise.
>
> Like you folks with the ever "Inquiring Mind", I would like to see your equations
> relevant to the necessity of an 18 wheeler size ground system in order that my
> poor little Fortex can radiate a competitive signal!
>
> With all due respect to Cecil and Jess, I feel that this thread has out lived it's
> productiveness having become a pissing match. I apologize for the bandwidth
> that I have expended contrary to this thread in an attempt to bring in a direct
> quote on the coil composition from Jim Blankenship of Fortex.
>
> Flame me if you must, I am done with it!
>
> Sincerely,
>
> Bill WA8WG
>
1. You posted what I thought was a sensationalistic claim, in
stating your Stelth "cleaned house by 3.7db" using the silver
plated coil. You neglected to mention what the other players
were using, distance, or type fs measuring equipment.
2. Doubting the +3.7db could have been achieved over a
well designed, capacity hat, Bug Catcher or Homebred system,
I asked you to be more technically specific (I knew the
system you used) but had no idea what you were competing against.
3. You then post you had a "very modified,top hat, Fortex system
and the second place system you beat by 3.7 db was a spiral
wound, top hat system.The rest of the field was down
from that.
4. You then insult the group intelligence with your non
technical BS about pissing contests,secrets, 18 wheeler
ground loss etc.
You have a nice looking, center loaded,
capacity hat, hi-Q system, mounted on a unit bodied
Mercedes platform. "Oh Humm"
If you really wanted to be informative you would have
included the call letters, system info, power, FS readings
of ALL the contestants.
When asked for detailed information you cry foul, you
flame,you whimper, and pick up your toys and run home
crying to mother.
I have no doubt 3.7db was achieved over something!
That something, is what I have doubts about!
> JESSE, W6KKT
>
>
>
>
>
>
>