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1-30 MHz 0.5-1W class C amplifier

Using 5 cheap BJT (BC547) I built a small, cheap and easy class C QRP amplifier for HF bands.

guidoGuido
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I needed to amplify the SI5351 output from my HF FT8 transceiver.
I got the inspiration from http://sm0vpo.altervista.org/tx/qrp-hf1.htm where the two transformers weren't exactly specified.
I experimented the use of two small BN43-2302 binocular ferrites

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