The QCX cw transceiver from QRP-Labs is one of the most popular kits for radio amateurs on the market and sells for just $49. It comes in single band versions from 80m to 17m. Earlier in 2019, they sold their 8,000th kit which just testifies how popular this little 5 watt radio is.
QRP-Labs have now announced that they are releasing an accompanying amplifier which is capable of 50 watts.
Some of the key features...
Designed for the QCX CW transceiver kit
Up to 50W power output on 40m with 20V supply, falling to around 25W at 13.8V supply
50-ohm input and output
Fast clean solid-state Tx/Rx switching provides full break-in operation (QSK)
Can be built for one of 40, 30m or 20m bands with the supplied components (or other bands with suitable choice of Low Pass Filter components)
Uses two low-cost IRF510 transistors as the power amplifier in push-pull configuration
Recommended amplifier operation in Class C (Not suitable for SSB)
On-board 7-element Low Pass Filter for harmonic attenuation
Standard inexpensive components throughout (easy to replace)
The chart below shows how the output power is dependent on the supply voltage and the frequency.
The price of the amplifier is just $29.50. There is also an optional enclosure for an additional $16.
For more info, go to https://qrp-labs.com/50wpa.html
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