How do i make a 9 to 1 balun out of a 3/8 ferrite rod (Receiving only)

Gilles VE2ZTT

ve2ztt wrote:
How do i make a 9 to 1 balun out of a 3/8 ferrite rod (Receiving only)

Gilles VE2ZTT


http://www.dxzone.com/cgi-bin/dir/jump2.cgi?ID=5979

JS

John Smith wrote in :

http://www.dxzone.com/cgi- ...


Hmmm, another site hijacked by dxzone.com

If web developers don't use frames, the following code snippet inserted
after the /head tag will prevent dxzone and the like opening your content
under their banner... Owen

script language="JavaScript"
!-- Begin code
if(top!=self) top.location.href=self.location.href
// End code --
/script

Owen Duffy wrote:
John Smith wrote in :

http://www.dxzone.com/cgi- ...


Hmmm, another site hijacked by dxzone.com

If web developers don't use frames, the following code snippet inserted
after the /head tag will prevent dxzone and the like opening your content
under their banner... Owen

script language="JavaScript"
!-- Begin code
if(top!=self) top.location.href=self.location.href
// End code --
/script

homepage:
http://www.qsl.net/wars/

mlb page:
http://www.qsl.net/wars/construct/mlb.htm

more balun stuff and just stuff:
http://www.qsl.net/wars/construct/

JS

How do i make a 9 to 1 balun out of a 3/8 ferrite rod (Receiving only)


Take 3 pcs of wire, put little temporary tags on them to identify the ends,
wind them together on the core. Then wire them in series. Call one end
ground and the other end hot. Your high impedance terminals are the hot to
ground and your low Z terminals are one winding up from ground, and ground.
In other words your low Z is one winding and your high Z is all three
windings.

Rick K2XT

Thank you
No problem to make it now. By the way John i didn't know about it. One
of these day my pc will post by itself and will be answered by another
pc or what!!!!
Thank you Rick too and Merry Christmas
Gilles VE2ZTT

"Rick" wrote in message
...


How do i make a 9 to 1 balun out of a 3/8 ferrite rod (Receiving only)


Take 3 pcs of wire, put little temporary tags on them to identify the
ends, wind them together on the core. Then wire them in series. Call one
end ground and the other end hot. Your high impedance terminals are the
hot to ground and your low Z terminals are one winding up from ground, and
ground. In other words your low Z is one winding and your high Z is all
three windings.

Rick K2XT

It might work better if you twist the three wires together first.

Tam/WB2TT

"Tam/WB2TT" wrote in message
...

"Rick" wrote in message
...


How do i make a 9 to 1 balun out of a 3/8 ferrite rod (Receiving only)


Take 3 pcs of wire, put little temporary tags on them to identify the
ends, wind them together on the core. Then wire them in series. Call
one end ground and the other end hot. Your high impedance terminals are
the hot to ground and your low Z terminals are one winding up from
ground, and ground. In other words your low Z is one winding and your
high Z is all three windings.

Rick K2XT

It might work better if you twist the three wires together first.

Tam/WB2TT


Made one up tonight and hooked it up to my Halicrafter rx. I never knew how
much I was missing on this radio.

"ve2ztt" wrote in message
ups.com...
How do i make a 9 to 1 balun out of a 3/8 ferrite rod (Receiving only)

Gilles VE2ZTT


NOTE: With (Matching) Transformers "Baluns" it is the "Ratio" of the Squares
of the Number of Turns that 'defines' the "Ratio" of the Matching
Transformer.

Here are some straight math common examples:

* One to One "1:1" = (1X1) : (1X1) = 1 Turn to 1 Turn



A 3:1 balun would have a Turns Ratio of 1.7320508 Turns to 1 Turn


* Four to One "4:1" = (2X2) : (1X1) = 2 Turns to 1 Turn

* Nine to One "9:1" = (3X3) : (1X1) = 3 Turns to 1 Turn



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



Nine-to-One (9:1) Balun.
Primary (Antenna) Turns to Secondary (FeedLine) Turns.
21 Turns to 7 Turns

OR
30 Turns to 10 Turns

OR
42 Turns to 14 Turns




First: Use large enough wire for the Primary (Antenna) Windings to
cover 85%-99% of the ferrite rod's area. Or, "Space Evenly" the Primary
Windings 'far enough apart' to cover 85%-99% of the
ferrite rod's area.

Second: Wind the Secondary Windings over the Primary
Windings. Use the same size wire "Spaced Evenly" to wrap
the Secondary Windings to cover 85%-99% of the Toroid's
Area.



How To Make A High Power 4:1 Balun Info

http://www.bloomington.in.us/~wh2t/balun.html



73, Ace - www.WH2T.com