WSPR 10 MW on 10M Band

I test WSPR beacon on 10M band. Beacon on Si5351+Arduino+BS170 AMP radiate only 10 mW. My antenna is wire 10 m long, 4 m upper the ground. Beacon is working two weeks continiously. Some spots:
2017-12-12 17:28 R2AJA 28.126060 -27 -1 KO85xt 0.01 PG0DX/1 JO33ce 2052 275
2017-12-12 17:04 R2AJA 28.126049 -26 0 KO85xt 0.01 OZ7IT JO65df 1608 278
2017-12-08 12:38 R2AJA 28.126028 -11 -3 KO85xt 0.01 OZ1FJB JO55si 1651 279
2017-12-08 12:18 R2AJA 28.126041 -26 0 KO85xt 0.01 OZ9QV JO65cp 1603 280

See the photos in Attachments.

AttachmentSize
Image icon My beacons (2016 year)283.68 KB
Image icon Spots WSPR 10M, 10MW217.59 KB
Image icon WSPR BEACON in working 10M, 10MW457.05 KB
Image icon T-match520.9 KB