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Articles

Articles for those passionate about amateur radio and beyond. A blog dedicated to wireless communications enthusiasts, especially for beginners.

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RF Amplifiers
24/02/2024

3-30MHz HF Amplifier 3-10W | ROWPA-01EXP

HF amplifier for 3-30MHz designed for QRP and similar applications, conceived as an experiment to validate a particular schematic architecture detailed in the article.

RF Amplifiers
02/02/2024

25W HF Linear Amplifier 2 x IRF510 Miudinho (PY2OHH)

This is an experimental 25W HF Linear Amplifier built after i built the BITX multiband transceiver. It can deliver min. 22W 160-10m with an everage gain of 33dB.

RF Filters
24/01/2024

7th Order Low Pass Filter Set for 160 -10m (WARC included), 20W

7th order Low Pass Filter using T37-2, T37-6 and T50-2 iron powder rings, for QRP power amplifiers testing or for experimental lab use.

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