Owen Duffy wrote:
"Walter Maxwell" wrote in
:

"John Smith" wrote in message
...
wrote:
...
deals with a Windom Antenna, his text on the design, construction,
function and implementation of baluns is well worth the read.

Doesn't that article espouse the Guanella 4:1 current balun built on a
single toroid?

The extent to which such a construction works is due to flux leakage,
rather than the principles described by Guanella.

Owen

Owen:

You might have missed this part from the Windom URL:

"As far as the forward power to the antenna is
concerned there is no ferrite core. This is
because we have transmission “through two
transmission lines”. There is no external flux
around transmission lines. However if the
antenna is unbalanced there will be leakage or
common mode current flow through the
balun. These currents are not transmission line
mode currents. These currents will see a
choking reactance presented by the balun and
be stopped or significantly reduced. These
leakage currents if extremely excessive can
cause heating of the balun (but you have
probably got a serious problem that you need
to fix). Very high SWR can cause voltage
dielectric loss and even flashover between the
windings. Again this would indicate a more
serious problem with the antenna."

I should think a single core would be superior in relation to the above
stated phenomenon. Indeed, I suspect it to be preferable to two cores.
However, if such "leakage" is occuring, the author indicates you have
a problem with the antenna proper which needs a fix ...

However, this URL:

http://www.n0ss.net/qrp_4-1_guanella-type_balun.pdf

in the include pick 4-1_schematic.jpg, in the URL, contains a "blurb" on
how to move a single core design on to two cores.

Regards,
JS

John Smith wrote:

However, this URL:

http://www.n0ss.net/qrp_4-1_guanella-type_balun.pdf

in the include pick 4-1_schematic.jpg, in the URL, contains a "blurb" on
how to move a single core design on to two cores.

Did you mean a two core design onto one core?

Here is an analysis of the single core version:
http://www.vk1od.net/balun/gsc/index.htm .

Guanella did not show the 4:1 balun on a shared magnetic circuit, and it
is an error on the part of those who think that the two independent TLTs
in Guanella's circuit can be coupled without changing the behaviour
significantly (basically, ruining it).

Owen

Owen wrote:

...
Did you mean a two core design onto one core?

Here is an analysis of the single core version:
http://www.vk1od.net/balun/gsc/index.htm .

Guanella did not show the 4:1 balun on a shared magnetic circuit, and it
is an error on the part of those who think that the two independent TLTs
in Guanella's circuit can be coupled without changing the behaviour
significantly (basically, ruining it).

Owen

Let's cut the crap, currents in one winding which cause lines of force
in the toroid/ferrite-core, should only assist the lines of force
generated in the core by the other winding on the opposite side of the
core--in the single core model of the guanella balun--composed of two
1:1s in a 1:4 configuration (or guanella TLT, since you seem to prefer
acronyms.) At least TLT get the transmission line requirement out in
the open ...

Since toroids naturally demonstrate "economy of loss" in the magnetic
lines of force within their structure, few, if any, lines of force would
be shared between two separate cores, stacked.

Now, wasn't it Einstein who recommended that things only be made as
complex as necessary and not one iota more?--Or, watch out for the gray
haired man who keeps attempting to sneak behind the curtains in this
train ride though Oz--and KEEP HIM AWAY FROM THE LEVERS! ;-P

Regards,
JS

--
It is like a nightmare where the public servants are the people which
the police are supposed to protect us from!