> > --- In
QRPLabs@..., "Paul KE7HR" wrote:
> > >
> > > The GPS is not needed to make WSPR work. All of my U2 WSPR work has been
> > without a GPS. A few iterations of setting the 20 MHz oscillator frequency
> > are required, but mine has run for more than a week solid with less than 1
> > second drift after adjustment. Because one of my applications for WSPR will
> > never have GPS, I may eventually build an accurate real time clock based on
> > the ChronoDot module and an Arduino to simulate the GPS, but so far I have
> > not seen the need.
> > >
> > > For the final output power supply I used a cheap switching regulator
> > from eBay. Similar to:
> > >
> >
> > > I use them because they are more efficient than the linear regulator.
> > Less heat, and heatsinking, and the signal is not interfered with as far as
> > I can tell.
> > >
> > > There are versions of the LM2596 regulator with a voltmeter now attached
> > that I see on eBay which might be nice for setup.
> > >
> > > Yes, the manual for Hans kit and the WSPR documentation makes good
> > reading. Enjoy.
> > >
> > > Paul KE7HR
> > >
> > > --- In
QRPLabs@..., "Don" <don1mh@> wrote:
> > > >
> > > > Paul,
> > > > From what you said, a variable PS just for the final or finals might
> > be interesting. Use a LM-317 and pot for regulator. Bad news yesterday. Was
> > going th use my old FV-M8 for the GPS. Data out was good on scope, but no 1
> > pps output. Using it on other projects, I never needed this output. What a
> > letdown! Checked it over and over. Nothing. Sparkfun shows FV-M8 retired,
> > so went with the EM-406A. Guess WSPR will have to wait a few days. OK on
> > questions. I should read the manual!
> > > >
> > > > Don
> > >
> >
> >
> >
>
