[600MRG] More surprises for w0yse on 630m WSPR

[Neil Klagge]

A new station decoded my 630m WSPR peanut whistle overnight, W7LUX near Flagstaff AZ at 405 miles!
Earlier KM5SW in NM decoded me at the very limit of capture. Paul is about 480 miles from me. Paul has a K9AY loop, 80 ft tall and pointed NW.


6 unique spotters:

Timestamp       Call    MHz     SNR     Drift   Grid    Pwr     Reporter        RGrid   km      az      Mode    # Spots
 2023-01-05 01:44        W0YSE   0.475762        -34     0       DN41ah          0.001   KM5SW/NW        DM65st          776     140     2       1
 2023-01-05 08:12        W0YSE   0.475762        -26     0       DN41ah          0.001   W7LUX   DM45    654     173     2       1
 2023-01-05 01:24        W0YSE   0.475762        -27     0       DN41ah          0.001   KA7OEI-1        DN31uo          43      320     2       51
 2023-01-05 01:24        W0YSE   0.475764        -26     0       DN41ah          0.001   W0KP    DN41ab          28      180     2       174
 2023-01-05 01:24        W0YSE   0.475763        -13     0       DN41ah          0.001   KZ7O    DN31xe          16      207     2       102
 2023-01-05 07:16        W0YSE   0.475763        -5      0       DN41ah          0.001   WB7RLX          DN41af          9       180     2       92


My antenna is sooo inefficient that my 5w TPO is lucky to produce more than about 1 mW of EIRP. ( I will try to take more measurements today to see if I can confirm my EIRP)

The TX antenna is a base loaded inverted L whose top wire lays on the roof shingles and goes over an 18 ft peak and down the other side. The top wire is only 30 ft long and the vertical part is only 10 ft. The shingles alter the wire's capacitance which becomes about 140 pf rather than the much lower open-air wire predicted value.

My 'ATU' is simply a parallel tuned tank circuit with taps at the bottom, one tap to the coax, and one back to the output of the IRF 510 FET amplifier. It brings my SWR down to 1.1:1 going into the coax. I am surprised at how well it works.

Thanks and kudos to all who are hearing me. Much appreciated!

73

*´¨)
¸.•´¸.•*´¨) ¸.•*¨)
(¸.•´ (¸.•`   Neil , wØyse, DN41ah, North Ogden, Utah 84414

My ham radio website: http://w0yse.webs.com/
<http://wg2xsv.webs.com>
My Faith website: http://neilsfaith.webs.com/
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