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Ultra small HF CW Transceiver

Very nice construction of the ultra small CW QRP multiband portable transceiver by Peter OK1XGL. The transceiver gives up to 5W. Receiver uses switched mixer so the IP3 is very good.

Info Battery Pack for Ultra small HF CW Transceiver (HF_TRAMP)

The NiMH battery pack for miniature SW transceiver HF_TRAMP. The battery is packed into the same small housing as transceiver itself and gives energy for up to 8 hours of work. The internal intelligence supervises charge and discharge processes and monitors the state of the battery. It is possible to charge the battery from any power source with voltage from 8V up to 22V capable giving 14W. The output current from the battery is limited to 2A.

Home measurement of RTX parameters

Is it possible to measure parameters of RTX at home? The text is trying to show, what is possible to measure on transceivers at home.

Transceiver NIVEA II

NIVEA II is improved version small telegraph transceiver for children. It works on a single frequency (XTAL) and it has good receiver part and correctly made PA.