Mike,

try here http://www.usfamily.net/web/k9eq/ah4/ah4.htm

regards,

Roger G7JAQ

--


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You just need a simple choke balun between the balanced ladder line and the
unbalanced tuner.

A choke balun can be made by winding a pair of wires (like 18 or 16 gauge
speaker cable) around a 2" diameter ferrite ring. 12 to 18 turns will do
provided cable length on the ring is not longer than 1/10th wavelength at
the highest frequency of use.

How it works is intuitively obvious.
---
Reg.


"Michael Melland" wrote in message
...
Anyone feeding a dipole with ladder line feed from an Icom AH-4 ?

I can find articles from people using it with whips and random length
wires.... but I'd like to feed a dipole with ladder line from it.... one
leg
to the tuner's ground and the other leg the active tuner output. I think
I
would be able to float the tuner without a fixed "ground" connection then
.... the non active leg acts like a counterpoise in a balanced antenna
like
this right (?).

Mike


--
Michael Melland, W9WIS
Winneconne, WI USA
http://webpages.charter.net/w9wis

Dipole and Icom AH-4
 

Anyone feeding a dipole with ladder line feed from an Icom AH-4 ?

I can find articles from people using it with whips and random length
wires.... but I'd like to feed a dipole with ladder line from it.... one leg
to the tuner's ground and the other leg the active tuner output. I think I
would be able to float the tuner without a fixed "ground" connection then
..... the non active leg acts like a counterpoise in a balanced antenna like
this right (?).

Mike


--
Michael Melland, W9WIS
Winneconne, WI USA
http://webpages.charter.net/w9wis

1) Do NOT float the tuner, you will destroy the electronics. Grounding one
side of a dipole won't affect it unless you have a low impeadence ground
surface and a high impeadence antenna. Even then it will just skew your
pattern.

2) I ran an Alinco version of that tuner to balanced line for several
years. Worked well ( I got the idea from an SGC publication). When I
was later changing to a Johnson matchmatch box, I did some A / B comparisons
and found that receive signal strength was higher on the Matchbox on some
bands than it was on the unbalanced autotuner, but I had to look for the
differences.

3) I tried a home made air core 1:1 balun in the line. It tuned but the
signal strength was better with out the balun.

4) I fed both dipoles and loops this way.

KA9CAR


"Michael Melland" wrote in message
...
Anyone feeding a dipole with ladder line feed from an Icom AH-4 ?

I can find articles from people using it with whips and random length
wires.... but I'd like to feed a dipole with ladder line from it.... one
leg
to the tuner's ground and the other leg the active tuner output. I think
I
would be able to float the tuner without a fixed "ground" connection then
.... the non active leg acts like a counterpoise in a balanced antenna
like
this right (?).

Mike


--
Michael Melland, W9WIS
Winneconne, WI USA
http://webpages.charter.net/w9wis

Hi Mike,

How did you plan to float the tuner? It would
probably be grounded through the coax shield and
possibly through the dc power ground, wouldn't it?

Chuck


Michael Melland wrote:
Anyone feeding a dipole with ladder line feed from an Icom AH-4 ?

I can find articles from people using it with whips and random length
wires.... but I'd like to feed a dipole with ladder line from it.... one leg
to the tuner's ground and the other leg the active tuner output. I think I
would be able to float the tuner without a fixed "ground" connection then
.... the non active leg acts like a counterpoise in a balanced antenna like
this right (?).

Mike


--
Michael Melland, W9WIS
Winneconne, WI USA
http://webpages.charter.net/w9wis