DIY audio fanatics appreciate this ‘chipamp’ a lot. See for example https://audio-creative.nl/audio-creative/diy-lm3886-chipamp/
LM3886 as 65 Watt audio amplifier
It provides 65 Watts audio into 8 ohms. Audio quality is more than all right. PCB’s with this chip are available for about 10 euro’s (eBay, Aliexpress).
Bunch of low-cost LM3886 PCB's (10 euro each)
The frequency response curve shows that we are dealing with a broadband amplifier. @ 200 kHz the attenuation is only 1.7 dB !
Therefore, this chip should be able to be used as an RF amplifier for the 2200 m band (135.7 – 137.8 kHz) and lower bands.
A challenge for the designer is of course to adapt the 8 ohms output to the antenna impedance.