[Lowfer] DDS exciter completed!

[Dexter McIntyre]

Looks good Eric!  Perhaps you took Lyle's advice to build on a slightly
larger board than his original. Wish I had done that.  Mine got a little
crowded.  See mine at:

http://www.w4dex.com/DDSboard.jpg

http://www.w4dex.com/DDSfront.jpg 

73,
Dex


Eric Smith wrote:
> 
> Alone here in the wee hours of the morning (I never sleep) I've completed
> the DDS exciter.  I can't believe it, but it worked the FIRST TIME!  Even
> the RS-232 interface worked the first time, both ways.  I know that's
> almost impossible to believe, but it is true.  The only thing I did wrong
> was to forget the DC blocking capacitor between the little Phillips amp
> and the output transformer, but I figured that out before I completed the
> thing.
> 
> I've programmed it (D5a) and started playing with the KISS commands.  This
> is SO cool!
> 
> I'll get it in its enclosure over the next couple of days.  I'll have the
> protoboard beacon I've been using replaced with this exciter and the
> remote final as soon as I can.
> 
> Here are the pictures of the exciter as I'm testing it right now (and also
> of the remote amp, which you've already seen):
> http://www.nutstreet.net/radio/projects/lowfer/dds/
> 
> Thanks to Lyle and Murray...this circuit is a hybrid of their designs.
> And thanks to Stewart Nelson for the 12.8 MHz TCXO.
> 
> 73
> Eric, KD5UWL