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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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