[Lowfer] Audio limiting using diodes, and capacitor

[Andy - KU4XR]

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 )
Coordinates:  N:  35º 43' 54" - W:  84º 3' 16"
http://www.myspace.com/beaconxr
http://webpages.charter.net/ku4xr/


--- On Sat, 4/10/10, Mike.WE0H <we0h at gmx.com> wrote:

> From: Mike.WE0H <we0h at gmx.com>
> Subject: Re: [Lowfer] Audio limiting using diodes, and capacitor
> To: "Discussion of the Lowfer (US, European, & UK) and MedFer bands" <lowfer at mailman.qth.net>
> Date: Saturday, April 10, 2010, 1:49 AM
> Wonder how that would work with WSPR
> decoding? I tried using DSP while 
> receiving WSPR signals and it caused the software to stop
> decoding even 
> though the signals were easier to hear. Don't know...I
> think Dave /17 is 
> transmitting WSPR on 600 meters. See if you can get decodes
> with the 
> noise reduction.
> 
> Mike
> WE0H
>