Beverage transformers
Today I had a call from Jirka OK2RZ ( please see his web! ) around beverage transformers. We spoke about Amidon material 43 and 73. So I decided to do some quick measurements. I do not have material 73, so I tested only 43 and 75 one, which I have got into 2N5109 preamps...
Design is from ON4UN book:
[1] source ON4UN Low Band DXing book
S11 - SWR - for BN-43-202
S21 - insert loss - for TWO BN-43-202
S11 - SWR - for T50-75
S21 - insert loss - for BN-43-202 + T50-75
Some more info about material 73 at OK3RM web.
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