[Lowfer] Beacon Schematic

[William E. Isakson]

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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