On Mon, 27 Jun 2005 15:05:18 GMT, "Chris Trask"
wrote:

how is it that the ferrite makes the line appear longer?
The ferrite makes the line look longer by way of it's permeability

Hi Chris,

Conventionally, this is not an asset of BalUns. In fact, employing
permeability risks saturation, and saturation risks catastrophic
failure.

The paragraphs that followed (not quoted here) relate to the operation
of a conventional transformer.

Second, if this were to occur (through the design of a "transmission
line transformer" that was a voltage BalUn); what is the advantage of
longer lines?
It's a matter of what's practical.

Practical? This does not prove an advantage, it is a non-sequitur.

If you were to use very short lines
along with a high permeability material such as Fair-Rite 73, you may
encouter a region where the lines are too short to couple properly and the
magnetic material is well above the ferroresonance frequency. And even when
you do get into the flux-coupling môde, you still need to have sufficient
line in order to obtain decent coupling at lower frequencies. So, you have
to balance the two (line length and magnetic material) in order to obtain a
wideband transformer that has consistent performance over the desired
frequency range.

Most of this presumes a conventional transformer design. Your data
supports the results encountered from a conventional transformer
design. The risks of using a conventional transformer design are
legion. I see nothing that suggests this novel design is superior to
a Transmission Line Transformer (AKA Current BalUn).

73's
Richard Clark, KB7QHC