[Lowfer] ZL1BPU LF DDS exciter

Sat, 2 Nov 2002 11:15:14 +1300

I've had a 3 watt beacon running continuously on 181.0000 kHz for the last 2
months now-using the ZL1BPU  DDS LF exciter. It has a normal speed (approx
10wpm) CW id, followed by a 25 second dot QRSS callsign ident and then a
Jason ident with a couple of callsigns and qth.
I'm  about to start lashing up another exciter so I can leave the beacon one
running and play with another- they are VERY cheap to build compared to any
other LF DDS source you can think of.

73
 Dave
ZL3FJ

----- Original Message -----
From: "Michael Silvers" <[email protected]>
To: <[email protected]>
Sent: Friday, November 01, 2002 7:58 AM
Subject: Re: [Lowfer] LW-MAX support

> Hi,
>
> Anyone in this group consider using ZL1BPU Murray's LF
> Exciter?  See
> http://www.qsl.net/zl1bpu/micro/EXCITER/Index.htm
>
> 73 de Mike KB6WFC k ..
>
>
> --- Les Rayburn <[email protected]> wrote:
> > At 01:19 AM 10/31/2002 -0500, you wrote:
> >
> > >Les,
> > >
> > > >>Is there anyone out there that has succeeded in
> > getting these boards to
> > > >>work?
> > >
> > > >My LW-MAX worked great for weeks on end...when I
> > checked it during the
> > > summer
> > > >it was still working fine too. The frequency was
> > a little off from the
> > > >"dial" frequency, but once verified with a
> > frequency meter it was "dead
> > > on" for weeks at a time.
> > >
> > >I remember this now. This is good! I hope there are
> > more out there that
> > >have had good luck with the card and see these
> > postings.
> > >
> > >Mike is really confident after making some more
> > measurements that his
> > >frequency is close to 185.300. He DID just mention
> > that his new loop
> > >position is very close to a metal building so maybe
> > we will learn
> > >something about how a loop performs in this kind of
> > environment. Paul C
> > >had some problems when he attempted to operate his
> > TX loop next to his big
> > >tower having many guys all around the loop.  I
> > think the problem showed up
> > >when he tried to tune it to resonance. Not the case
> > with Mike S.
> > >
> > >Thanks for the comeback, Les. What are your
> > beaconing plans for the coming
> > >season?
> >
> >
> > Bill,
> >
> > My beacon plans are uncertain at the moment. Work
> > has been
> > a disaster since the 9/11 attacks, and lately I'm
> > working a 2nd
> > job at nights to make ends meet. Not much time for
> > dxing, etc.
> >
> > The LW transmitter is ready to go, just need to find
> > the time to
> > reconnect it and tune the antenna.
> >
> > My experience with the LW MAX is that the "frequency
> > readout" is
> > ballpark at best. But once I used a frequency meter
> > to establish
> > the frequency it was accurate to within 1hz over
> > long periods
> > of time.
> >
> > Lyle had no trouble copying my Christmas message two
> > seasons ago in QRSS mode using the LW Max
> > transmitter
> > at 900+ miles.
> >
> > It's a shame that more folks weren't interested in
> > the unit.
> > In general, I think software defined radios are the
> > future
> > of our hobby, and this early example was very well
> > made for it's inexpensive price.
> >
> > There is still the possibility of users writing code
> > to
> > implement WOLF, or other modulation schemes, but
> > if he'd sold 50 units or so, we might have
> > encouraged
> > more software to be written.
> >
> > Oh well...perhaps if we get the 136khz band, there
> > will
> > be more demand for something like this.
> >
> > I'm looking at one of the new WinRadio receivers now
> > for the same reasons.
> >
> > 73,
> >
> >
> >
> > Les Rayburn, director
> > High Noon Film
> > 100 Centerview Drive
> > Suite 111
> > Birmingham, AL 35216
> > (205) 824-8930
> > (205) 824-8960 FAX
> > (205) 253-4867 CELL
> > http://www.highnoonfilm.com
>
>
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