[Lowfer] CW Spacings

John Andrews w1tag at w1tag.com
Sat Mar 24 19:14:44 EST 2007


Robert,

The long integration to which you refer is possible only if the signal 
stays put in frequency, as it would at LF or VLF. The Doppler shifting 
and similar effects even at 160 meters can be pretty wild. I remember 
when K0LR tried WOLF and slow QRSS on 160. The results were not pretty!

Some of us have tried similar experiments at 13.5 MHz, and QRSS3 has 
been the minimum practical speed. QRSS10 is possible, but both depend on 
repetitive "beacon" text so that you can catch characters the next time 
around. Narrower BW stuff just turns into mush.

John Andrews



More information about the Lowfer mailing list