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Date: Sat, 13 Feb 2016 20:30:21 +0000
Message-ID: <CAA8k23RmL2fA7r4ZrWW6_7+XooCcfMTbiohWB_Fx-aS0Ny6Fbg@mail.gmail.com>
From: Andy Talbot <andy.g4jnt@gmail.com>
To: rsgb_lf_group@blacksheep.org, rsgb_lf_group@yahoogroups.co.uk
Subject: LF: Third-method LF Upconverter
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I've just completed a write up of my third-method direct audio upconverter,
this can be found at http://www.g4jnt.com/ThirdMethodUpconverter.pdf

It's an all-analogue design, so probably could be considered a bit dated
when the input circuitry, and possibly even more, could now all be done on
a DSP chip.  But at least it's simple to build and to visualise!

There are three PICs inside it, two doing completely trivial tasks,  but
was the easiest way to implement them; the other is a DDS tuning
controller.  Source and Hex code for all of them can be downloaded from the
link given in the .PDF

In view of the complete lack of interest in PCBs when I mentioned this
earlier - I shan't be designing one.  My breadboard PCB design, shown in
the photograph at Figure 6,  isn't really suited for distributing as it has
been hacked around more than a bit.

Andy  G4JNT

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<div dir=3D"ltr">I&#39;ve just completed a write up of my third-method dire=
ct audio upconverter, this can be found at=C2=A0<a href=3D"http://www.g4jnt=
.com/ThirdMethodUpconverter.pdf">http://www.g4jnt.com/ThirdMethodUpconverte=
r.pdf</a><div><br></div><div>It&#39;s an all-analogue design, so probably c=
ould be considered a bit dated when the input circuitry, and possibly even =
more, could now all be done on a DSP chip.=C2=A0 But at least it&#39;s simp=
le to build and to visualise!</div><div><br></div><div>There are three PICs=
 inside it, two doing completely trivial tasks, =C2=A0but was the easiest w=
ay to implement them; the other is a DDS tuning controller.=C2=A0 Source an=
d Hex code for all of them can be downloaded from the link given in the .PD=
F</div><div><br></div><div>In view of the complete lack of interest in PCBs=
 when I mentioned this earlier - I shan&#39;t be designing one.=C2=A0 My br=
eadboard PCB design, shown in the photograph at Figure 6, =C2=A0isn&#39;t r=
eally suited for distributing as it has been hacked around more than a bit.=
</div><div><br></div><div>Andy =C2=A0G4JNT</div></div>

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