[Lowfer] ZL1BPU DDS exciter

Tue Feb 24 00:49:18 EST 2009

http://www.qsl.net/zl1bpu/MICRO/EXCITER/Index.htm

Source code/firmware - see the bottom of the article - 

Cheers from snowy China...

-----Original Message-----
From: lowfer-bounces at mailman.qth.net
[mailto:lowfer-bounces at mailman.qth.net] On Behalf Of Zack Widup
Sent: Tuesday, February 24, 2009 12:41 PM
To: Discussion of the Lowfer (US, European, &amp,UK) and MedFer bands
Subject: Re: [Lowfer] ZL1BPU DDS exciter

I have an STK-500 programmer.

Is the source code or at least the hex file available somewhere?

73, Zack W9SZ

On 2/23/09, Howell, Laurence (Shanghai/Singapore) <
L.Howell at conocophillips.com> wrote:
>
> I think the biggest problem was getting a slow enough PC to prog the
> Atmel device - I ended up using an old IBM parallel port running Win
> 95..wonder where that is?
>
> I did get some corruption in the registers from induced RF noise from
my
> transmitting array but I was dealing with 10's of Volts per meter at
137
> kHz from a loop running nearly 40/50A of current and a 1.25kW tx just
a
> few metres away  http://www.kl1x.com/shack.jpg ; I sorted this out by
> improving the filtering to the DC 12V  to the unit and adding common
> mode chokes suitable for LF on the control ports. In standalone mode
it
> ran for weeks by itself with no issues resending the same format.
>
> I think the only other problem is going to be how to program the
sucker
> seeing as I haven't powered it up/seen it in over 3 years...  I ran
the
> DDS and 1W 4426 PA thru a 137kHz LPF (just in case) and that drive the
> Decca Transmitter directly
>
http://homepage.ntlworld.com/mike.dennison/index/lf/decca/transmitter.ht
> m  (thanks Mike)
>
> Laurence BY3A-KL 1 X, Tianjin China
>
> Aka x WD2XDW and now   WE2XPQ...Wasilla AK
>
>
>
>
> -----Original Message-----
> From: lowfer-bounces at mailman.qth.net
> [mailto:lowfer-bounces at mailman.qth.net] On Behalf Of Andy - KU4XR
> Sent: Tuesday, February 24, 2009 10:36 AM
> To: Discussion of the Lowfer (US, European,& UK) and MedFer bands
> Subject: Re: [Lowfer] ZL1BPU DDS exciter
>
> --- On Mon, 2/23/09, Charles W5COV <cvest at cox.net> wrote:
>
>
> > The Futurlec development board would make a simple approach to it
> > and not have to do all of the point to point wiring .
> > I have one here , that I have never taken the time to build up .
>
>
> Thanks for the reply Charlie; That's my next biggest question.
> Lyle spoke of " adding to " or " modifying " the board with additional
> components. And your term " taken the time to build up " Once I get
> that little circuit board full of parts out of its box; I'm gonna
> be standing there looking at it and saying " now what ? " I'm pretty
> much convinced I'm ordering the board, and any other computer related
> parts will probably be on hand or at Radio Shack.
>
>
> > Once programmed with mode , ID , frequency , it is stand alone .
> > Just  have to hook it back up to the computer to make changes to
> > these parameters
>
> OK; that answered those questions, so ; I've already made progress.
>
> I appreciate your input. 73 for now:::
>
>
>
> Andy - KU4XR - EM75xr - Friendsville, TN.
> LOWfer Beacon " XR " @ 184.322 KHz ( QRSS-60 )
> Coordinates:  N:  35* 43' 54" - W:  84* 3' 16"
> http://www.myspace.com/beaconxr
>
>
> --- On Mon, 2/23/09, Charles W5COV <cvest at cox.net> wrote:
>
> > From: Charles W5COV <cvest at cox.net>
> > Subject: Re: [Lowfer] ZL1BPU DDS exciter
> > To: "Discussion of the Lowfer (US, European, & UK) and MedFer bands"
> <lowfer at mailman.qth.net>
> > Date: Monday, February 23, 2009, 9:15 PM
> > Andy , Peter ,
> >
> >    When Lyle and I first contacted Murray about this , Lyle
> > bought enough
> > parts for I think it was 10 "kits" . He sold them
> > almost immediately .
> >    Several of us built them and I am not aware of anyone
> > that had a problem
> > with getting them up and running . Well actually I think I
> > made a couple of
> > stupid mistakes.
> >    The people I was in contact with , used the 12.8 MHz .
> > TCXO . That is I
> > believe the single most expensive part . Even at that some
> > of us were able
> > to obtain those at no cost from a list member , Stewart ,
> > when I built a
> > second one . Mine were built with point to point wiring .
> >    It might seem a bit intimidating just reading the page ,
> > but really is
> > pretty user friendly , once you get to the point of
> > programming it .
> >    The Futurlec development board would make a simple
> > approach to it and not
> > have to do all of the point to point wiring . I think Dex
> > used the Futurlec
> > board and I have one here , that I have never taken the
> > time to build up .
> >    As far as spare parts , I keep a spare AT90S2313 on hand
> > and the usual
> > spares used in the classic K0LR amplifier . I ended up
> > using that instead of
> > the original design by Murray .
> >    There is a world of wealth and knowledge on this list
> > and I am quite sure
> > between everyone there is enough patience and technical
> > ability to help you
> > out of any problems that you might encounter .
> >    Once programmed with mode , ID , frequency , it is stand
> > alone . Just
> > have to hook it back up to the computer to make changes to
> > these parameters
> > .
> >
> > Charlie , W5COV , WE2XXO
> >
> > CV , 185.2983 kHz . , QRSS60 , 24 / 7 , EM26ex , OK.
> >
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