Ok Jan. Thanks for reply.
Your system in the boat sounds Good.
I have tried sometimes "resonating" counterpoises.
At the moment there is only one for 20m.
Some years ago I had wooden motorboat abt 7m long with cabin
for sleeping and driving. I wish to have that time this kind
modern radios with auto ATUs that time.I was using IC730 with
HomeMade ATU, Antenna was 4 m long fiberglass stick.
Ground was done by seweral connections to engine and steels outside.
Now I am driving small fiberglass boat with windscreen and 30 hp outboard.
There is no space for radios..
part of 80m. To make it tune 80m I have to add a 0.4m
pigtail to the
antenna connection of the tuner, parallel to the antenna
wire.
How is that pigtail positioning when it is working, how did you found
idea to use it ? That is intresting!
As I have told, winter is soon here, this weekend goeing to cottage
to empy all water tanks and pots. There is only IC730 and G5RV, my
20 years old base station, still working very well.
FT897/FC40 are already at town QTH. FT897 is now connected to multiband vertical on the top of roof. Inv L antenna is fed by IC706/AH3 .
After you writing, I have to make fast some counterpoises with L ant,
before snow and ice comes.
73s es gl dx de rami, oh6bi
--- On Mon, 27/10/08, fil_jds <fil_jds@...> wrote:
From: fil_jds <fil_jds@...>
Subject: [YaesuTuner] Re: AH3 vs FC40
To: YaesuTuner@...
Date: Monday, 27 October, 2008, 3:53 PM
Rami,
yes indeed you might need a good counterpoise system. The
best
starting point is at least 1 tuned (cut for 1/4 wave
length) radial
per frequency you want to use, and stretch them on the
ground,
starting from a central ground bus bar point close to your
antenna
tuner.
Of course even better is a system with 16 or 32 radials in
a star
formation, but who has the available and free garden
surroundings to
do so....
On my sailing boat, the FC40 is working quite well with
following
counterpoise:
1. wide copper tape running from atu to a bronze underwater
object
(coupling to the seawter)
2. copper tape from atu ground connected to the stainless
steel "lifelines" that run along both sides of
the boat and are
about 8 m long
3. 2 tuned radials for 20 m and 2 tuned radials for 40m
running
along both sides of the boat on the deck, strapped to the
aluminium
toerails
The wire antenna is 9.60m long, and tunes all freq but only
upper
part of 80m. To make it tune 80m I have to add a 0.4m
pigtail to the
antenna connection of the tuner, parallel to the antenna
wire.
With this the FC40 tunes perfectly with SWR's lower
than 1.5:1 on
all ham bands. So when the FC40 cán tune a frequency, then
it works
super super fast.
I've made good DX contacts with this system on 20m and
on 17 m (even
japan) from the boat with only 100Watts.
Jan
--- In YaesuTuner@..., raimo ilkka
<oh6bi@...> wrote:
Thanks for your reply Jan.
When I bought FC40 I believed that it is as the
competitors.
After three months testing I finally found some wire
lengths
which were quite good, but even founded lengths were
not stable.
I checked many times my wiring and nothing was changed
after
earlier
weekend. Then it came two weeks "rains
season" and 23m wire
started behave same way as I got it working in the middle
of testing
period. Almost all bands were tuned again.. So, how was my
ground ?
I did plenty of works for ground system and still same
situation,
I didnt know what was goeing on ??
Making several tests and "speakings" through
HAM groups, no
explains.
My ground is not the best one but quite good anyway, I
really know
that.
I have told through this group how it is built, so I
am not goeing
to write that all agn.
My "final" feelings with FC40 are OK, if not
expecting that it can
tune whatever...
Like manual "standard" ATUs there are many
different types for
different antennas and bandwidths.
With FC40 5 or 10 percents away from the half wave
length is not
enough.
I have learned that it suppose to be at least 15 to 20
percents.
Maybe FC40 is built (or programmed) different way than
AH3 (or4),
because changes with the ground or soil are more
effective.
I have FT897 and I like it much. FC40 is the best
friend of that
Rig
and good thing them together is FC40s memory,,but,,
when antenna
system is stable.
I should have more time to continue testing after I
have got
some experience, but winter and other type of antennas
(magloop)
are taking my time now, maybe next summer at the cottage
agn.
I think best way to get FC40 working is against of
counterpoise,
then soil doesnot effect so much as straight
connection to gnd.
best regards and 73?s de rami, oh6bi
--- On Fri, 24/10/08, fil_jds <fil_jds@...>
wrote:
From: fil_jds <fil_jds@...>
Subject: [YaesuTuner] Re: AH3 vs FC40
To: YaesuTuner@...
Date: Friday, 24 October, 2008, 7:23 PM
Well Rami, this is what I was complaining about.
Apparently
the
tuning range (impedance matching range) of the
FC40 is
quite narrow
as compared to other ATU's. I think it is
only 15-600
Ohms Z. Don't
know about reactance tuning.
THis is why it mostly does not tune well on all
bands for a
given
wire length. One thing that can help id putting a
4:1 or
9:1 UNUN
between the wire and the ATU.
Jan
ON3ZTT
--- In YaesuTuner@...,
"oh6bi"
<oh6bi@> wrote:
Hi.
It was week ago I had HAM weekend with my
friend at
cottage.
My friend wanted to test his Icom rig in low
level QRM
QTH.
So, I took my AH3 tuner (almost similar as
FC40) to
cottage for him.
The 23 meter wire I found good during my
earlier tests
was used
with
AH3 and Icom radio.
I dont member exactly how 23wire was working
during
last year
tests,
but there was some frequencies where FC40
didnt tune.
Those FRGs
were
tuned perfectly with AH3. And FRGs what I
never tested
with FC40
was
tuned well by AH3. Even the down end 1.8 MHz
was tuned
nicely.
This FC 40 compared to AH3 has smaller coils
and
should be compare
with icom AH4. Unfortunately I dont have
AH4, just 2
pcs
AH3 and one FC40.
I am not telling that FC40 is not good. I
try to tell
that the HAM
has to know his stuff and make the things
working.
There is NO Perfect tuner what can tune
everything.
FC40 is goog stuff for Yaesu radios, but
have to think
how to use
it.
73s es GL DX de rami, oh6bi
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