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Old June 27th 10, 07:07 PM posted to rec.radio.shortwave
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Default Matching transformer comparison?

RHF wrote:

- c: Same antenna with a 9:1 ratio transformer

First most of the very broadband 9:1 Matching
Transformers that are shown for Shortwave Radio
Listening (SWL) are also designed to cover the
AM/MW/BCB down to 500 kHz and SW Bands
up to 30 MHz. These usually recommend about
a 10-Turn Primary for the Feed-Line to the Radio
and about a 30-Turn Secondary for the Antenna
side.

Note - That you set a 5 MHz lower 'limit' so you
might want to cut the number of turns in half and
have a 5 -Turn Primary with a 15 Turn Secondary.




Both the examples you give have a three to one ratio. If this is a
nine to one example, I must be missing something in your explanation.

Please enlighten me.



mike





 
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