I was looking at utube video's and came across a few for the G90. Looks cool, 20 watts (5 watts carrier), its an sdr, so maybe its great on AM. Then it came up on Amazon, order by 4 pm and get it today. Today? Its sunday at 2pm! Well, it arrived next morning before 6:30. I have no idea how they do it. Anyway, the radio arrived working ok on RX but not at all on TX, all distorted and nasty sounding. It arrived with version 1.6 firmware, I loaded 1.7.1 and it seems to work much better. As it is now, AM is stuck at 5 watts carrier max (which is fine) but it only does about 20% positive at 100% negative, maybe they will fix that in the future. Bandwidth on TX is 5.5 Khz audio, about 11 Khz wide signal. If they fix the modulation, it can sound good, receive is good, not great, the screen is small, not for vision impaired operators, its got little buttons as well. More a man pack rig that does 160 to 10 with a good wide range antenna tuner built in. The output is clean, it does not get hot, it seems very well made, its heavy for its size. Its a 24 bit sdr, the RF spectrum is downconverted to baseband like the old Flex 3000 and 5000 rigs, but its a 24 bit A/D converter. The RF passes through the band pass filters as well as the antenna tuner (if selected). Bandwidth is adjustable on RX, audio is good in the headphones and not bad in the built in speaker. The front is detachable and hooks up with a DB9 cable, but I am not sure what you would then do with it. It has no way to mount it to anything. The radio has an IQ output so you could run it into a computer and run hdsdr on a big screen, or one of the many other programs. I am still waiting for a small easy to use hifi sdr transceiver, the G90 is not it. Its just too small for easy use and the TX is not great (yet). The MChf and its clones (R928 plus) are great in every respect except the poor TX. Easy to use, nice display, nice options, fantastic audio on RX, and a totally crappy transmitter in every respect. The Elad fdm duo has fantastic audio rx and tx, and overall great performance, and about 10 buttons or knobs short of easy to use. The elecraft stuff stuff needs more knobs and buttons and audio is so so. The Nouveau 75 is fair on RX (it overloads and does not have sharp filters) but it quite good on TX with some simple mods. Its not an sdr, and its 80 meters only. All the smaller Japanese rigs I have tried were very poor on AM. As it is, if you want a small portable or battery operated station, there is nothing good that I know of. The Elecraft is about best, the KX2 and KX3 at least work like you expect, not hifi, but not a dirty distorted mess. The G90 comes close if they fix the modulation, its small, but its all band, all mode, has a (good) tuna built in. Thats my two cents anyway.