[Lowfer] DK7FC

[Michael Sapp]

Hi All: Just two decodes from DK7FC last nite, although his signal was lightly visible what one 
could interpret as the mid to high -30s  level several times.  I had an image carrier line from
the 137.6 mystery signal right on Stefan's WSPR signal likely interfering. Successful decodes
were with the input level to the WSPRX package set in the 23~24 dB range. NB and AGC off.
Time to test to see if those light image lines from the 137.6 mystery signal are intermod or
actual in-band signals.  I tried a 1dB pad on the input, no help....should have done the
3dB pad test.... Perhaps time to replace  that fixed gain resistor on the MC1496 mixer
 pins 2-3 with a variable pot.....or get my +17DBM and 10MHz rubidium oscillator up and running....


       2013-02-17 04:30   DK7FC   0.137610   -38   1   JN49ik   1   WA3TTS   EN90xn   6636   298  
       2013-02-17 04:15   WE2XEB   0.137617   -1   1   FN12lq   1   WA3TTS   EN90xn   343   228  
       2013-02-17 04:00   DK7FC   0.137610   -33   1   JN49ik   1   WA3TTS   EN90xn   6636   298 


73  Mike wa3tts