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Hi All

In June I wrote here abt 23m long wire testings, I got some good
results. Last weekend I did new tests and started with 24,5 m long
wire, running tests all bands (160 to 10m), then shortening abt 20 cm
and running tests again. I did that abt 10 times so long that length
22m length was reached.
I was wery surprised: antenna or tuner didnt work as it was working
earlier! I got match only with 18, 21 and 10 m bands, not at all with
lower bands. FC40 telling just HSWR... I checked all connections,
grounding etc and they where OK.
Is it possible that FC40 needs the Reset from internal DIP switch.
Anyone done that ?

73s de rami, oh6bi

Rami,

did your ground conditions change?
If the FC-40 does not find a match it is often due to not sufficiant
ground. Increasing the number of radials helped me often.

A reset clears the memories and helps in some situations.
However, if you manually tune, the FC-40 should find a match if
possible, regardless whether the memory is used or clear.

If the memories are filled up with matching settings from an earier
used antenna, you will have to rewrite them all with the values for
your new antenna by manual tuning.
If the memories are clear, the tuner will use the next valid
"neighbour" memory, which is obviously better than using values from a
different antenna.


I never found a wire length that worked on all bands. Your earlier
posting sounded very promising to me...

73, Jurgen, DJ5HD

Hi Jurgen and Clive

Only change was the rain, it was quite rainy week and
ground was much more better than during earlier tests.
Soil in my cottage is not good, it is on island where
some soil is covering rocky hill..
Radials and counterpoises will come later: the reason I am doing this
way is to find simple and fast antenna when I am travelling.

Anyway I will make some new tests again starting tomorrow evening.
Will see what happens, I have been searching the web and found
some other HAMs who are also speaking abt 23m long wire.

Always when I am at cottage I have two radios on HF.
The Old Radio (IC 730) is mostly QRV at 3680 kHz, connected to G5RV
antenna. If You want we can try QSO... abt after 1600 GMT until the
80 band comes too noisy. (and SAT and SUN whole day)

73s de rami, oh6bi

--- In YaesuTuner@..., "dj5hd" <jurgen@...> wrote:

Rami,

did your ground conditions change?
If the FC-40 does not find a match it is often due to not sufficiant
ground. Increasing the number of radials helped me often.

A reset clears the memories and helps in some situations.
However, if you manually tune, the FC-40 should find a match if
possible, regardless whether the memory is used or clear.

If the memories are filled up with matching settings from an earier
used antenna, you will have to rewrite them all with the values for
your new antenna by manual tuning.
If the memories are clear, the tuner will use the next valid
"neighbour" memory, which is obviously better than using values

from a

different antenna.


I never found a wire length that worked on all bands. Your earlier
posting sounded very promising to me...

73, Jurgen, DJ5HD



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

Hi All

In June I wrote here abt 23m long wire testings, I got some good
results. Last weekend I did new tests and started with 24,5 m

long

wire, running tests all bands (160 to 10m), then shortening abt

20 cm

and running tests again. I did that abt 10 times so long that

length

22m length was reached.
I was wery surprised: antenna or tuner didnt work as it was

working

earlier! I got match only with 18, 21 and 10 m bands, not at all

with

lower bands. FC40 telling just HSWR... I checked all connections,
grounding etc and they where OK.
Is it possible that FC40 needs the Reset from internal DIP switch.
Anyone done that ?

73s de rami, oh6bi

Rami
Improving ground conditions can most definitely make it more
difficult to find a match. I believe that the reason is that ground
losses can attenuate the reflected signal seen by the tuner.

Whatever the underlying reason I know from my own experience with the
FC-40 that improving your ground will often increase your SWR.

Roy

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

Hi Jurgen and Clive

Only change was the rain, it was quite rainy week and
ground was much more better than during earlier tests.
Soil in my cottage is not good, it is on island where
some soil is covering rocky hill..
Radials and counterpoises will come later: the reason I am doing

this

way is to find simple and fast antenna when I am travelling.

Anyway I will make some new tests again starting tomorrow evening.
Will see what happens, I have been searching the web and found
some other HAMs who are also speaking abt 23m long wire.

Always when I am at cottage I have two radios on HF.
The Old Radio (IC 730) is mostly QRV at 3680 kHz, connected to G5RV
antenna. If You want we can try QSO... abt after 1600 GMT until the
80 band comes too noisy. (and SAT and SUN whole day)

73s de rami, oh6bi

--- In YaesuTuner@..., "dj5hd" <jurgen@> wrote:

Rami,

did your ground conditions change?
If the FC-40 does not find a match it is often due to not

sufficiant

ground. Increasing the number of radials helped me often.

A reset clears the memories and helps in some situations.
However, if you manually tune, the FC-40 should find a match if
possible, regardless whether the memory is used or clear.

If the memories are filled up with matching settings from an

earier

used antenna, you will have to rewrite them all with the values

for

your new antenna by manual tuning.
If the memories are clear, the tuner will use the next valid
"neighbour" memory, which is obviously better than using values

from a

different antenna.


I never found a wire length that worked on all bands. Your earlier
posting sounded very promising to me...

73, Jurgen, DJ5HD



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

Hi All

In June I wrote here abt 23m long wire testings, I got some

good

results. Last weekend I did new tests and started with 24,5 m

long

wire, running tests all bands (160 to 10m), then shortening abt

20 cm

and running tests again. I did that abt 10 times so long that

length

22m length was reached.
I was wery surprised: antenna or tuner didnt work as it was

working

earlier! I got match only with 18, 21 and 10 m bands, not at

all

with

lower bands. FC40 telling just HSWR... I checked all

connections,

grounding etc and they where OK.
Is it possible that FC40 needs the Reset from internal DIP

switch.

Anyone done that ?

73s de rami, oh6bi

Hi Roy, Heippa Rami!
Roy, you hit the nail with that, my Finland QTH has been built literally on a rock. No possibility of banging in a ground rod- and even if you do, its of no use unless it's resonant at the op freq!
Its why i selected the loop, as its a balanced antenna....
Has anyone any experience with offset dipoles / doublets and the FC-40 to share with us Rock Hounds?

Cheers,
Clive
OH2FBK / G1WZM

- original message -
Subject: [YaesuTuner] Re: New Problem FC40 ?
From: "roycarlson12" <ny0r@...>
Date: 10/08/2007 12:54 am

Rami
Improving ground conditions can most definitely make it more
difficult to find a match. I believe that the reason is that ground
losses can attenuate the reflected signal seen by the tuner.

Whatever the underlying reason I know from my own experience with the
FC-40 that improving your ground will often increase your SWR.

Roy

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

Hi Jurgen and Clive

Only change was the rain, it was quite rainy week and
ground was much more better than during earlier tests.
Soil in my cottage is not good, it is on island where
some soil is covering rocky hill..
Radials and counterpoises will come later: the reason I am doing

this

way is to find simple and fast antenna when I am travelling.

Anyway I will make some new tests again starting tomorrow evening.
Will see what happens, I have been searching the web and found
some other HAMs who are also speaking abt 23m long wire.

Always when I am at cottage I have two radios on HF.
The Old Radio (IC 730) is mostly QRV at 3680 kHz, connected to G5RV
antenna. If You want we can try QSO... abt after 1600 GMT until the
80 band comes too noisy. (and SAT and SUN whole day)

73s de rami, oh6bi

--- In YaesuTuner@..., "dj5hd" <jurgen@> wrote:

Rami,

did your ground conditions change?
If the FC-40 does not find a match it is often due to not

sufficiant

ground. Increasing the number of radials helped me often.

A reset clears the memories and helps in some situations.
However, if you manually tune, the FC-40 should find a match if
possible, regardless whether the memory is used or clear.

If the memories are filled up with matching settings from an

earier

used antenna, you will have to rewrite them all with the values

for

your new antenna by manual tuning.
If the memories are clear, the tuner will use the next valid
"neighbour" memory, which is obviously better than using values

from a

different antenna.


I never found a wire length that worked on all bands. Your earlier
posting sounded very promising to me...

73, Jurgen, DJ5HD



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

Hi All

In June I wrote here abt 23m long wire testings, I got some

good

results. Last weekend I did new tests and started with 24,5 m

long

wire, running tests all bands (160 to 10m), then shortening abt

20 cm

and running tests again. I did that abt 10 times so long that

length

22m length was reached.
I was wery surprised: antenna or tuner didnt work as it was

working

earlier! I got match only with 18, 21 and 10 m bands, not at

all

with

lower bands. FC40 telling just HSWR... I checked all

connections,

grounding etc and they where OK.
Is it possible that FC40 needs the Reset from internal DIP

switch.

Anyone done that ?

73s de rami, oh6bi