[Lowfer] Beacon Schematic

[KA4SEY]

I'm going to keep it in the circuit just in case. Thanks for the heads up.

Kasey

On Mon, Nov 23, 2020, 3:41 PM William E. Isakson <bill.isakson at gmail.com>
wrote:

> you need the low pass filter.  The harmonics are in the broadcast band.
>  You probably want another lowpass filter actually at the antenna too, just
> to make sure we keep the band for HAMs.   In other words, you do not want
> to raise dust.
> --------
>
>
> *Ø  I am not a Politician*
>
> Bill Isakson     AC6QV
> Roseburg, Oregon USA
> bill.isakson at gmail.com
>
>
>
>
> On Mon, Nov 23, 2020 at 10:19 AM John Hamer <wilbur0611 at gmail.com> wrote:
>
> > Kasey,
> > What about something like this? I simplified the oscillator
> configuration.
> > You could use the capacitors Jay offered to send you. I removed the low
> > pass filter so you won't have to deal with impedance matching on your
> > loading coil.
> >
> > I'm sure this is where your failed components are coming from. I'm sure
> you
> > wont have issues with interference from your transmitter on other
> devices,
> > but if you do, you could add a low pass filter later that is the
> impedance
> > of your antenna instead of 50 ohms. I wouldn't worry about that now
> though.
> >
> > I added an LM317 adjustable regulator to the input to the final so you
> can
> > adjust your voltage without needing an adjustable power supply. I added
> the
> > 5v regulator that was missing from the schematic. I added an optional
> volt
> > meter. You can just use your handheld meter here instead. But, it shows
> > where to measure your voltage since you need that along with the current
> to
> > determine your power to the final.
> >
> > It's missing the Keyer IC, but you can just use your other schematic for
> > that and connect it the same way.
> >
> > This transmitter and antenna configuration is much easier to set up and
> > tune than the one you have and I used to have.
> >
> > Regards,
> > John Hamer
> > Lowfer JH
> >
> > [image: simpltx_mod.gif]
> >
> > On Mon, Nov 23, 2020 at 8:48 AM KA4SEY <ka4sey at gmail.com> wrote:
> >
> > > Down below I put a different schematic of a Lowfer transmitter.
> Hopefully
> > > that one will be better than the one I followed. Please let me
> know.Sent
> > > from my Verizon, Samsung Galaxy
> > >
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