Last evening and night I was monitoring 630m WSPR with my Zachtek WSPR RX using the outer of the coax up to my 2m big-wheel antenna via a ferrite rod ATU and a mains plug ground. 7 different stations were copied. The RX certainly works with DX over 1000km with this poor setup.
Although more expensive, I preferred to buy from Zachtek in Sweden although I know there is a Chinese copy of the Zachtek TX and probably the RX now.
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