Jim M0BMU was firing up his transmitter on 137kHz today using WSPR. Managed very good reception of his 200mW ERP here at 69kms range. See screenshot - he is the yellow dashes. He was clearly audible by ear too, so a 12 wpm CW signal would have been copied well.
You are able to search for products and find amplifiers and ham radio transmitters here.
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