[Lowfer] Audio limiting using diodes, and capacitor

[Andy - KU4XR]

I am still working on my transverter setup for 1750. I hope to get it
running very soon. Got to get a power supply going, and then get the
transverter driving the switching PA. Still some bugs to work out,
but I'll get there.

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, 2:43 AM
> 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 )
> > Coordinates:  N:  35º 43' 54" - W: 
> 84º 3' 16"
> > http://www.myspace.com/beaconxr
> > http://webpages.charter.net/ku4xr/
> ______________________________________________________________
> Lowfer mailing list
> Home: http://mailman.qth.net/mailman/listinfo/lowfer
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Lowfer at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>