开云体育

开云体育

Thanks for the replies. The antenna starts off at the corner of my
fence which is about 5' up from the ground. It then runs straight to
the top peak of my house which is about 30'+ high. This run is about
65'. The wire passes through a ceramic insulator then it comes down
to the left corner of my house were it is looped in a ceramic
insulator. It then passes through the wall to the tuner which is
inside the crawl space. The tail from the insulator to the tuner is
about 14 inches long. I have buried a 4' long piece of rebar into the
moist dirt of the crawl space. I attached a ground rod lug and a
piece of 12 guage wire from the tuner to the lug. One question I have
, does distance from ground rod to tuner matter? After some testing
last night I confirmed again that I cannot tune 80 or 30 meters. I
have also picked up rfi in one tv and the surround sound of another.
This was not a problem with my OCF. Hope this helps, I will be
experimenting more today. Thanks again.

73

JR

--- In YaesuTuner@..., "jay_hendershott" <jrcomp@...> wrote:
. I do need to find a way to get at

least 75/80 back into the mix. Anyways wondering if anyone has
upgraded the input connection cable and the internal output wire size?
If so was any improvement noted? I believe that the benefits would
not outway the time, effort and risk but I could be wrong. Any hints
on gaining 75/80 meters back would be appreciated. Thanks and 73

JR
K7GFH

Hi JR,
You shouldn't have to do anything to the tuner. This tuner, or more
accurately, antenna coupler, is a great tuner when used correctly
(similar to Icom's AH-4. and SCG couplers).
We need more info on your antenna. You said you're have about 90'of
wire, but how is it set up, i.e. long wire, inverted L, etc.) and most
importantly, what are you using for a counterpoise?
And the coax is fine. The SWR from the tuner to your radio will
(almost) always be around 1.5 to 1 so loss should low, even with
longer lengths.
I will also e-mail a PDF on antenna's from the SCG company. It's very
good reading. I use an AH-4 with a vertical loop, about 200' of wire.
Keep asking questions and we'll help. 73, Jeff/wb0m

Hello,

New to the group and to the FC-40. I have owned an 857D for a few
years now running barefoot into a homebrew OCF. Within the last few
days I purchased the FC-40 and have strung up about 90' of wire. After
looking over the FC-40 I found it a little odd that they supply you
with 8X or larger coax but the connection into the unit is RG-58
sized. Internally the output wire which connects to the ceramic
insulator seems a little small, sized 12 guage wire. Not trying to
sound negative here, the unit works great. The only bands I cannot
tune now is 80 and 30 meters. I have never been able to tune 160 on
my OCf which is exciting for me. I do need to find a way to get at
least 75/80 back into the mix. Anyways wondering if anyone has
upgraded the input connection cable and the internal output wire size?
If so was any improvement noted? I believe that the benefits would
not outway the time, effort and risk but I could be wrong. Any hints
on gaining 75/80 meters back would be appreciated. Thanks and 73

JR
K7GFH

开云体育

Hello,

New to the group and to the FC-40. I have owned an 857D for a few
years now running barefoot into a homebrew OCF. Within the last few
days I purchased the FC-40 and have strung up about 90' of wire. After
looking over the FC-40 I found it a little odd that they supply you
with 8X or larger coax but the connection into the unit is RG-58
sized. Internally the output wire which connects to the ceramic
insulator seems a little small, sized 12 guage wire. Not trying to
sound negative here, the unit works great. The only bands I cannot
tune now is 80 and 30 meters. I have never been able to tune 160 on
my OCf which is exciting for me. I do need to find a way to get at
least 75/80 back into the mix. Anyways wondering if anyone has
upgraded the input connection cable and the internal output wire size?
If so was any improvement noted? I believe that the benefits would
not outway the time, effort and risk but I could be wrong. Any hints
on gaining 75/80 meters back would be appreciated. Thanks and 73

JR
K7GFH

There are alternatives to the FC-40 tuner. I have a huge loop with an
apex around 75 feet up in a tree. My SG-239 will tune all frequencies
from 160-10 meters. It has operated flawlessly at my QTH with temps
ranging from 10F-95F. The SG-239 is mounted about 75 feet from my rig
and is fed with Davis Buryflex coax.

You may want to take a look at the SG-239 from SGC.

Lets look at a few reasons why you may want one.

1 It will tune a long wire with radials and loops. The FC-40 will not
tune a loop.

2 The SG-239 does not need a control line for the rig but the FC-40
does. This makes installation much easier. I bought some buryable
wire for 120 volts (but carries 12v for the tuner) and ran it out to
my tuner which is in a waterproof electrical box that I got on ebay
for $15.00. SGC makes a device that lets you run DC over the coax
going to the tuner. It costs $160 so that is why I went with the
buryable wire for DC.

2 It costs $195.99 from AES and the FC-40 costs $250.00.

4 The only disadvantages to the SG-239 is that it needs to be put in
a waterproof box. And it will not tune 6 meters.

5 It will handle 80 watts for 100% duty cycle (CW & RTTY) but the FC-
40 will do 100. Not really a very big difference for the guy at the
other end of you signal.


For a real sweet antenna you could install one of these and put the
SG-239 at the base of it and get coverage from 160-10 meters.

My bet is that it would outperform any vertical from GAP, Cushcraft
or the like. Having a tuner at the base of the antenna makes it a lot
more efficient.

BTW, there is a Yahoo group devoted to the line of SGC tuners. I have
photos there of an SG-237 installation but it now has a SG-239 in it.
;

Zack
N8FNR


_______________________________________________________
Here are the SG-239 specs.

HF Frequency Range: 1.8-30 MHz
Power Input Range: 1.5-200 watts (PEP)
Or CW duty cycle 40%
Number of channels: unlimited
Revolving memory bins: 165 TX; 5 RX
Input Impedance Range: .2-5000 ohms
VSWR: (Typical) Typically less than 2:1
DC Input Requirement: +13.8 VDC (nominal)
DC Operating Range: +10 to 18.5 VDC
Input Current: Average: 230 milliamps
Random set time: Typical: less than 2 seconds
Recurrent set time: Typical: less than 10 milliseconds
Antenna Length: Minimum length of 9 ft. - 7 to 30 MHz
Minimum length of 40 ft.-3 to 30 MHz
Minimum length of 100 ft. - 1.8-30 MHz
Installation: Any position
Operating Temperature: -35° to +70°C
Size: 7.5"L x 6"W x 1.85"H
(19cm x 15cm x 4.5cm)
Weight: 2 pounds
Case Construction: Irradiated aluminum case
Control Cable Standard coaxial and 2 wires for DC plus 2
(not supplied) wires for optional SmartLock gauge 14-18
Antenna types: 1. Whip
2. Backstay (marine, sail)
3. Dipole centerfed
4. Dipole with feedline
5. Loop (small) 2x2 multi turn
6. Loop (large) 10 ft. and up single turn
7. Longwire
8. Ladder feed

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

------------------------------------

Yahoo! Groups Links

------------------------------------

Yahoo! Groups Links

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

------------------------------------

Yahoo! Groups Links

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

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

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

First partly copy from the message I wrote to Jan, maybe it is
intresting to others:

About the FC40 testing, this summer was somehow more busy and not
enough time for one vawelenght loop testing, some tests I did but not
enough to store results to the web. You should member from my
messages that I am doing tests in the summercottage, not useful in
the wintertime.

One tricky test I did when camping at SRAL summerhappening (SRAL is
like ARRL here in OH country ). I got thought abt G5RV what I have
been using all my RadioTime.. abt 25 yrs, idea was to use the
standard G5RV length 31,5 meters straight from the FC40 and it was
working nicely with several bands, I didnt write up the results
because test was done in the bush.

I didnt hear enough OH stations with that G5RV mod and I made
horisontal one vawlength loop to 3,7 MHz , that one didnt work, I
dont know why ? Tuner did his work and SWR was OK, but no QSOs,
it still questionmark.

When I was in ZamBia ( 9j2bi) , I got better results with temporary
G5RV, than with 23 m long wire what I told in my earlier messages.
but it still good idea jusgt to throw wire over tree and start QSOs.
should be realistic.. it is not so easy ****
... and the ground is needed too

One thing more I have to tell you, at town qth I have inv L antenna,
horisontal length abt 42 meters and vertical part 21 meters,
horisontal part abt 18 meters high , free space.
After coming back from that camping I told, I was thinking maybe
something wrong in FC40. I installed FC40 instead of my AH3 (icom
similar stuff) and FC40/FT897 was working OK
all bands.. not so good as IC706/AH3, but good anyway.

--------
Now back to Reply itself.

Ok Jan, good reply.

OCF Dipole can be fed different ways as you described, always
have to find best way to fit your needs and what are possibilities.
I did some OCF tests, but they were not perfectly documented,
thatswhy I didnt wrote results here. It was working OK in some bands,
the 23m wire is better, Maybe because of better ground.
Longer wire was connected to FC40 output and shorter wire to Ground
connector, the "real" ground connection was only in my ground bar,
where all my stuff is grounded, FC40 was not connected there during
this test. Suppose to do more testing with OCF..

Once I made windom to my AH3 / IC706 so that feeding was one third
from "shorter" side and single feeding wire length abt 8 to 10 m .
Cottage ground was there in the AH3 gnd connector. Whole system was
like inverted V, shorter line to town direction and longer part to DX
direction. It was GOOD antenna, but also no documentation. I did it
abt 8 years ago. What to learn from this:

DOCUMENTATION IS IMPORTANT !!!!

After years you can member just something !

73s de rami, oh6bi




--- In YaesuTuner@..., "fil_jds" <fil_jds@...> wrote:

Hi Rami,

I am also "forced" to use the FC40 and in reality I regret not

having

bought the SGC-230 instead...
The FC40 seems to have only a limited impedance and reactance

tuning

range and therefore is rapidly 'running out of breath" with more
demanding antenna systems.
As you will have found out, it is quite difficult to find an end-

fed

wire length that it will tune all-band.
A 23m inverted L with goud ground system it will tune.
On my sailing boat it is really giving me a headache.I use a

sloping

backstay wire as wire antenna, with a halyard running down from

mast

top, sloping to port sisde aft, with heavy duty isolator through

the

deck and 40 cm extra wire untill the FC 40. As RF ground I use wide
copper tape running to engine mass and also to an underwater bronze
strut underwater. Via copper tape also coupled to the stailess

steel

lifelines that run on both sides of the boat, + 2 radials cut for

40m

and 2 cut for 20m.
I can only tune all band (and still miss bottom part of 80m) with
9.6m total wire length till FC40. 12.5 or 13m does not work.
The FC 40 is also very very sensitive to length even some distande
away from 1/2 waves.
I tried to insert a 1:9 Unun at bottom just before tuner, with

12.5m

wire. Works more or less but this is lossy.

Now why do you try to tune an OCF dipole? Do you mean installing

the

FC40 AT the antenna, just where the 2 uneven dipole halves meet?
Normally the impedance there should be around 300 Ohms for most of
the usable bands (since normally a 1:6 balun + good choke is
installed there before running down coax).
The FC40 should be able to handle that 300 Ohms!
But why don't you justhook the FC40 at the end of the coax at your
transceiver, and install the normal 1:6 balun at the antenna? The
FC40 should easily tune-up the slight SWR you will find with and

OCF

dipole on some bands.

Another idea: run down a twin lead (450 Ohms of 1/2 electrical wave
on lowest band, then a 1:1 current balun and this into your FC 40?

I

would guess this would be a very losless system?

In a field situation like the Zambia, I would use 20m, 17m and 15m
simple wire vertical dipoles (no tuner needed) and maybe an 80m
horizontal loop, hanging at leats 10m high, fed with twin lead out

of

corner, to a 1:4 balun at the tuner.

Jan
ON3ZTT










--- In YaesuTuner@..., "oh6bi" <oh6bi@> wrote:

Hello All after long winter !

Yesterday I put my boat to sea and today goeing to summer
cottage with FT897 and FC40..
If you dont know about me, just read some earlier messages
from oh6bi in this group.

OK, last messages during autumn I told to start testing
FC40 and OCF dipole, yes I will do that.

During this winter I spent 3 months in Zambia (9J2BI)
and I didnt get good contacs to Europe with 23m long Wire.
I installed The Wire four times to different directions
to get better EU signals, but no good success, only some
QSOs to Europe, none to OH. JA and UA9 where the best.
Also local QRM and QRN where strong with The Wire.

After that I did some tests with 7 MHz deltaloop and that was much
better. QRN and QRM where lower and receiving signals better.
Unfortunately work was disturbing The Hobby and not enough
time for the loop. That means I will start this summer experiments
with 7 MHz Delta Loop.

You will see what happens..

By the way, does anyone have information how FC40 really works ?
I mean would be nice to build "universal control box" same way
as many has done with Icom AH4(and AH3, what I am using with

IC706).

Check in AH4 section from
AA7OL Niko Takahashi: "AH4 connetion to any Radio".

Best Regards and 73s de rami, oh6bi

Hi Rami,

I am also "forced" to use the FC40 and in reality I regret not having
bought the SGC-230 instead...
The FC40 seems to have only a limited impedance and reactance tuning
range and therefore is rapidly 'running out of breath" with more
demanding antenna systems.
As you will have found out, it is quite difficult to find an end-fed
wire length that it will tune all-band.
A 23m inverted L with goud ground system it will tune.
On my sailing boat it is really giving me a headache.I use a sloping
backstay wire as wire antenna, with a halyard running down from mast
top, sloping to port sisde aft, with heavy duty isolator through the
deck and 40 cm extra wire untill the FC 40. As RF ground I use wide
copper tape running to engine mass and also to an underwater bronze
strut underwater. Via copper tape also coupled to the stailess steel
lifelines that run on both sides of the boat, + 2 radials cut for 40m
and 2 cut for 20m.
I can only tune all band (and still miss bottom part of 80m) with
9.6m total wire length till FC40. 12.5 or 13m does not work.
The FC 40 is also very very sensitive to length even some distande
away from 1/2 waves.
I tried to insert a 1:9 Unun at bottom just before tuner, with 12.5m
wire. Works more or less but this is lossy.

Now why do you try to tune an OCF dipole? Do you mean installing the
FC40 AT the antenna, just where the 2 uneven dipole halves meet?
Normally the impedance there should be around 300 Ohms for most of
the usable bands (since normally a 1:6 balun + good choke is
installed there before running down coax).
The FC40 should be able to handle that 300 Ohms!
But why don't you justhook the FC40 at the end of the coax at your
transceiver, and install the normal 1:6 balun at the antenna? The
FC40 should easily tune-up the slight SWR you will find with and OCF
dipole on some bands.

Another idea: run down a twin lead (450 Ohms of 1/2 electrical wave
on lowest band, then a 1:1 current balun and this into your FC 40? I
would guess this would be a very losless system?

In a field situation like the Zambia, I would use 20m, 17m and 15m
simple wire vertical dipoles (no tuner needed) and maybe an 80m
horizontal loop, hanging at leats 10m high, fed with twin lead out of
corner, to a 1:4 balun at the tuner.

Jan
ON3ZTT










--- In YaesuTuner@..., "oh6bi" <oh6bi@...> wrote:

Hello All after long winter !

Yesterday I put my boat to sea and today goeing to summer
cottage with FT897 and FC40..
If you dont know about me, just read some earlier messages
from oh6bi in this group.

OK, last messages during autumn I told to start testing
FC40 and OCF dipole, yes I will do that.

During this winter I spent 3 months in Zambia (9J2BI)
and I didnt get good contacs to Europe with 23m long Wire.
I installed The Wire four times to different directions
to get better EU signals, but no good success, only some
QSOs to Europe, none to OH. JA and UA9 where the best.
Also local QRM and QRN where strong with The Wire.

After that I did some tests with 7 MHz deltaloop and that was much
better. QRN and QRM where lower and receiving signals better.
Unfortunately work was disturbing The Hobby and not enough
time for the loop. That means I will start this summer experiments
with 7 MHz Delta Loop.

You will see what happens..

By the way, does anyone have information how FC40 really works ?
I mean would be nice to build "universal control box" same way
as many has done with Icom AH4(and AH3, what I am using with

IC706).

Check in AH4 section from
AA7OL Niko Takahashi: "AH4 connetion to any Radio".

Best Regards and 73s de rami, oh6bi

Hello,

This email message is a notification to let you know that
a file has been uploaded to the Files area of the YaesuTuner
group.

File : /Yaesu-FC-40-Brochure.pdf
Uploaded by : vtnn43e48073 <vtnn43e@...>
Description : Yaesu FC-40 Brochure

You can access this file at the URL:


To learn more about file sharing for your group, please visit:


Regards,

vtnn43e48073 <vtnn43e@...>

Hello,

This email message is a notification to let you know that
a file has been uploaded to the Files area of the YaesuTuner
group.

File : /SGC stealthbook.pdf
Uploaded by : vtnn43e48073 <vtnn43e@...>
Description : SGC Stealth Antennas - lots of ideas for antennas to use with the FC-40

You can access this file at the URL:


To learn more about file sharing for your group, please visit:


Regards,

vtnn43e48073 <vtnn43e@...>

Hi all

I am planning to install FC40 to the roof but I am worried
of lightning, now FC40 is in my balcony and I am able to
connect and disconnect the antenna wire from it.

How is FC40 built ? Is there something to eliminate electric
pulses , sure I dont mean from the straight shot.

What happens in FC40 when I turn my FT897 on, I can hear some
noice from FC40.
When Radio is on but not "tuned" is Tuner in ByPass mode ?

Does it give some extra protection if build sparking gap between
antenna wire and FC40 ?

73s de rami, oh6bi

--- In YaesuTuner@..., "kd4hri" <mark@...> wrote:

Anyone know if there is any reason to use the Yaesu YA-007 as opposed
to a generic 102 to 108 inch whip?
de k4ed
aka Mark Sunderlin

Hi Mark,
It think it's mostly to get more money out of your pocket - as if
gas prices aren't doing that already. I've never heard of any good
reason. The same goes for the Icom AH-4 and their whip. I've even
heard of people loading the fiberglass CB whips. GL & 73, Jeff/wb0m

Does anyone have a FC-40 and 102-108 inch whip mounted in a RAV4?

Anyone know if there is any reason to use the Yaesu YA-007 as opposed
to a generic 102 to 108 inch whip?

--
de k4ed
aka Mark Sunderlin