[Lowfer] Clarification of Pacific NDBs

[Garry]

I like to tune using USB and 400 Hz audio so my receiver is set to 352.2 
kHz for the LSB of LLD, 330.6 kHz for the LSB of POA, and 399.2 kHz for 
the LSB of MDY. My receiver is an SDR-IQ that outputs demodulated audio 
via a virtual audio channel to Spectrum Laboratory usually set to 
display a 100 Hz audio frequency range between 350 and 450 Hz. I use a 
much narrower digital filter when I listen to the signal.

For example, the audio value I found last night was 399 Hz for LLD (i.e. 
the RF frequency was 352200+399=352599 Hz). That means the LSB of LLD 
was 401 Hz below the assigned carrier frequency of 353 kHz. This 
particular SDR-IQ runs off the internal XO clock and hasn't been 
calibrated recently so the frequency may be off a bit. I just checked it 
against lowfers WM and SIW at the 185.3 kHz watering hole and it seems 
pretty accurate there. Via NDBfinder software the cycle time was noted 
as approximately 8.62 seconds.
-- 
73, Garry, K3SIW, EN52ta, Elgin, IL