Up to now I have used the shack PC on mains power with the internal PC battery charging. In a few minutes I shall run the PC on its internal battery hoping for a lower noise floor.
UPDATE 2054z: Shack PC now running on its internal battery.
UPDATE 2132z: From the evidence of the last 1.5 hours the S/N of signals received on 630m WSPR improves by at least 10dB when the shack PC is on internal batteries. Previous tests were rather inconclusive, but results this evening are very clear.
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