> Rich and Plil have had an interesting discussion on torroid types, Here is
> a follow up question.
>
> If the type 61 starts to saturate at 10 MHz and is good to 30 MHZ at QRPP
> levels, what types
> are good for transformers, baluns, un-uns etc at 30 MHz at OR power levels?
> I have notices that
> the QRO amps are using a balun of some sort in there output circuit, what
> type of torroid is used in that application?
>
> TNX ES 73
>
> Jim Zellmer, KA0VSL
That is a 4:1 un un transformer to step 200 ohms down to 50 ohms.
The harmonic attenuation is the same as a Pi network, but this method
is much cheaper to produce than either a Pi or a Pi L tank circuit.
(((73)))
Phil, K5PC
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