[Lowfer] Audio limiting using diodes, and capacitor

[Mike.WE0H]

That's cool. The clipped audio definitely sounds fuzzy but it works fine 
for digital modes. So take that and WSPR mode and see what a Lowfer 
station can do on 1750 meters. I am thinking there will be some good 
distances covered day & night using a setup like you are doing now. 
Interesting experiment.

Mike
WE0H



Andy - KU4XR wrote:
> Mike:
> 
> I tried it with WAAYYY too much volume to try to obliterate the
> data stream by clipping. The clipping is audible, a raspy sound
> on the audio, and still getting good decodes. Going from rig into
> the diode clipper, then into the RC Tone control, into the PC
> sound card, feeding my DSP filter, then into WSPR as digital input.
> 
> 100410 0618  21 -12  1.0   0.503928  WD2XSH/12 33            0 19419  -15
> 100410 0620  16 -14  1.1   0.503939  <...> FN42PB 33        -1    12    0
> 100410 0620  13 -18  1.3   0.503960  WD2XSH/37 30            0     2    0
> 100410 0624  20 -12  1.5   0.503928  <WD2XSH/12> DM79GX 33   0     1    0
> 100410 0624  16 -16  1.6   0.503960  <WD2XSH/37> FN42FO 30   0     1    0
> 100410 0630  19 -12  1.4   0.503928  WD2XSH/12 33            0     1    0
> 100410 0630  17 -13  1.6   0.503940  WD2XSH/17 33            0     1    0
> 100410 0630  12 -20  1.6   0.503960  WD2XSH/37 30            0     4    0
> 
> Kinda surprising me. I figured the clipping would destroy decodes....
> 
> Andy - KU4XR - EM75xr - Friendsville, TN. USA
> LOWfer Beacon " XR " @ 185.29875 KHz ( QRSS-60 )
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