Ian Jackson wrote:

I can't totally disagree with you, but you seem to have totally failed
to answer the OP's question, which was "Do I keep the same number of
turns for each winding (9) if I use a T68-2 toroid?" I think that the
answer could be a "maybe".

While I had written:

In reality, there is not much that a few turns or an impedance mismatch
will do, so wind it the same way you would on the other toroid.


So we had both burried the same answer in a lot of other text. :-)

Geoff.

--
Geoffrey S. Mendelson, N3OWJ/4X1GM/KBUH7245/KBUW5379

In message , Geoffrey S.
Mendelson writes
Ian Jackson wrote:

I can't totally disagree with you, but you seem to have totally failed
to answer the OP's question, which was "Do I keep the same number of
turns for each winding (9) if I use a T68-2 toroid?" I think that the
answer could be a "maybe".

While I had written:

In reality, there is not much that a few turns or an impedance mismatch
will do, so wind it the same way you would on the other toroid.


So we had both burried the same answer in a lot of other text. :-)

But in the end, I decided that the answer was a probable 'yes'.

As to the efficacy of 9:1 un-uns, the augment in their favour is that
over the HF spectrum, they give a better match to a typical long wire
over more of range. However, there are relatively narrow parts where the
match is made worse.
--
Ian

Ian Jackson wrote:

As to the efficacy of 9:1 un-uns, the augment in their favour is that
over the HF spectrum, they give a better match to a typical long wire
over more of range. However, there are relatively narrow parts where the
match is made worse.

In my experince the ability to separate the DC path of the antenna to ground
did far more to improve readabilty than any slight improvment in matching.

This was both with modern (Kenwood R5000 and similar radios) and Drake
SPR-4s.

Geoff.

--
Geoffrey S. Mendelson, N3OWJ/4X1GM/KBUH7245/KBUW5379