[Lowfer] NC

[Bill Ashlock]

Peter,

>>......he showed that a 4 to 1 ratio improves the signal approximately >>8X 
>>over direct connection to the line.

>Interesting. So, Bill, given you are using a greater ratio but how many
>turns are used on the coax side?

Bill B used 16 turns on the coax side with a #43 core (64 on the antenna 
side for his 50ft antenna). I'm using a higher permeability #77 core with 
only 4 turns (40 on the antenna side to achieve a 10 to 1 ratio). I could 
have used a #43 core but 160 turns would have been required on the antenna 
side - not a fun task.

>Also, what is the basis of orientation when using "primary" and
>"secondary" for windings? Is it that pri. is input and sec. is output
>w.r.t. to a given circuit?

Yes, the primary winding would be the antenna side so this would called a 
step-down transformer, matching the high Z of the antenna to the low Z of 
the line/receiver.

BTW, I use the ferrite core also as a ring to physically tie the upper 
antenna wire, the ground wire, and the coax together. This junction is 
hanging in space below the tree limb.

Bill

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