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sharjeelaziz / wspr-receiver

WSPR receiver on Raspberry PI
GNU General Public License v3.0
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rtlsdr_wsprd calibration help please #1

Closed bradshawlupton closed 2 years ago

bradshawlupton commented 2 years ago

I am 100' from my WSPR beacon, which is getting over 700 spots per day.

The instructions beautifully built the rtlsdr_wsprd

GQRX loudly hears both my WSPR beacon and the pico-cw-beacon in my attic attic, both on 10m

I calibrated the both transmit beacons with a pico frequency counter GPS standard fro vu3cer Dhiru Kholia (neat stuff)

      https://github.com/kholia/pico-cw-beacon-drs 
               and
     https://github.com/kholia/pico_ft8_xcvr

=============== results

I have to believe that I have a calibration of the receiver step to add in. a 600 hz band is so terribly tiny. How may I confirm the crummy cheapest rtl-sdr is within a few Hz of correct?

=============== results

/home/bbl/SW/rtlsdr-wsprd/rtlsdr_wsprd -f 28.1246M -c wb2tev -l FN41 a.1 -d 2 Found 1 device(s): 0: Realtek, RTL2838UHIDIR, SN: 00000001

Using device 0: Generic RTL2832U OEM Found Rafael Micro R828D tuner Enabled direct sampling mode, input 2

Starting rtlsdr-wsprd (2022-10-14, 12:29z) -- Version 0.5.4 Callsign : wb2tev Locator : FN41 Dial freq. : 28124600 Hz Real freq. : 28124600 Hz PPM factor : 0 Gain : 29 dB Wait for time sync (start in 6 sec)

          Date  Time(z)    SNR     DT       Freq Dr    Call    Loc Pwr

No spot 2022-10-14 12:30z No spot 2022-10-14 12:32z No spot 2022-10-14 12:34z No spot 2022-10-14 12:36z No spot 2022-10-14 12:38z No spot 2022-10-14 12:40z

sharjeelaziz commented 2 years ago

@bradshawlupton Sorry, at the moment I am not very current on this. Have not done this in a while. Would have loved to help.

bradshawlupton commented 1 year ago

thank you, I am learning the calibration tricks, and will post them here soon. been transmitting spots for three years, It was about time to master understanding and watching my spots, from 100' away. I moved to 10m as the chaeap cheap $9 rtl_sdr starts at 27 mhz, and is dynamite at 100' and a 1/2 wave dipole, k1te bradshaw