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I am using this amp on a Xiegu X5105 with an ameritron arb-74 to do the switching with a homemade accessory Cable. The amp puts out and honest 25watts on 20m. On 80m it does 38watts. As you go up in frequency the power output gets lower. I put this amp on a spectrum analyzer and it looks pretty clean on all bands except 30m. 30m had a lot of harmonics and it just made it to be legal to use. There is no way of getting 45watts with this amp. Maybe measurement was taken without the low pass filters engaged. i guess you get what you pay for. The Xiegu XPA-125 amp is much more pricey at $600.00 but it does have a built in antenna tuner and it also is 125watts.
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Get suprisingly hot when in use! But seems to handle it ok. Only use cw mode here on different qrp radios like Sky Sdr/Ariel51 and KX3. Use it for dx contacts out in the woods/summits. I have 2 of them!
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Works really well - addition of 20m would be great
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Working without no problem, easy to use
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Worked from first start. Responds to power control on input. However I see no action on ACC line. I would need some instruction on that matter Unfortunately no user manual available Aside from that looks like a neat little device. YO3ITK, Steve
Verified purchase: Yes | Condition: New