[Lowfer] Lowfer KE

Sun Nov 22 10:19:06 EST 2020

Kasey,

Ohh, yeah,  you don't need to tre the 24v until you get the new
configuration.

Regards,
John Hamer
Lowfer JH

On Sun, Nov 22, 2020, 10:17 AM KA4SEY <ka4sey at gmail.com> wrote:

> No the original setup.
>
> On Sun, Nov 22, 2020, 10:13 AM John Hamer <wilbur0611 at gmail.com> wrote:
>
> > Kasey,
> >
> > Are you using the new loading coil configuration?
> >
> > Regards,
> > John Hamer
> > Lowfer JH
> >
> > On Sun, Nov 22, 2020, 10:07 AM KA4SEY <ka4sey at gmail.com> wrote:
> >
> > > John,Glad you could get it going, I'm messing around with 13.8 and 24
> > > volts and 13.8 seem s to work better? Now sure why but on 24 it draws
> > 20ma
> > > and on 13.8 it draws 40ma. At 13.8 it also has a stronger signal here
> at
> > > the house. Not sure if that's overloading it or what.KaseySent from my
> > > Verizon, Samsung Galaxy smartphone
> > > -------- Original message --------From: John Hamer <
> wilbur0611 at gmail.com
> > >
> > > Date: 11/22/20  9:53 AM  (GMT-05:00) To: "Discussion of the Lowfer (US,
> > > European, & UK) and MedFer bands" <lowfer at mailman.qth.net> Subject:
> Re:
> > > [Lowfer] Lowfer KE Kasey,That sounds good.  You are going to need the
> 24v
> > > to get 1 watt with thatconfiguration. I think it will work better for
> > you.
> > > It made a bigdifference for me. The new computer is working well.  I
> have
> > > been going through windowsupdates for hours because it has been off for
> > > years,  but it's almostthere.RegardsJohn HamerLowfer JHOn Sun, Nov 22,
> > > 2020, 9:48 AM KA4SEY <ka4sey at gmail.com> wrote:> Hey John, how is your
> > > computer setup doing? I meant to tell you, I took> the LPF out and both
> > > transistor are doing good. I put a 10W 50 ohm resistor> from the output
> > to
> > > ground and supplied 24v to the circuit and got 75ma to> the finals. It
> > was
> > > putting out a whopping 1.8 watts! The resistor even got> got. I'm
> > excited!
> > > Now with it out of line and back at the antenna it's on a> 13.8v power
> > > supply with the same configuration and I was getting 35ma to> the
> > finals. I
> > > believe that's about 450mw. But looking at the signal here on> the
> radio
> > > it's much stronger. I even picked the tub up and sat a milk crate>
> under
> > it
> > > and now it's a strong 20 over. So both of those helped. I will try> the
> > > configuration you told me to try today and see how that goes. I might>
> > try
> > > the thing on 24 volts and see if the signal increases.KaseySent from
> my>
> > > Verizon, Samsung Galaxy smartphone> -------- Original message
> > --------From:
> > > John Hamer <wilbur0611 at gmail.com>> Date: 11/22/20  9:38 AM
> (GMT-05:00)
> > > To: "Discussion of the Lowfer (US,> European, & UK) and MedFer bands" <
> > > lowfer at mailman.qth.net> Subject: Re:> [Lowfer] Lowfer KE I Believe he
> > has
> > > the capacitors on the oscillator and> they are just not onthe schematic
> > he
> > > posted.  I went through datasheet with> him over the summerand
> calculated
> > > the proper capacitor values.RegardsJohn> HamerLowfer JHOn Sun, Nov 22,
> > > 2020, 9:28 AM KA4SEY <ka4sey at gmail.com>> wrote:> Thank you John, I
> will
> > > add those capacitors on in the future and> make any> other changes.
> Like
> > I
> > > said I'm going to try another configuration> with the> coil today to
> see
> > if
> > > it will do any better. I will hopefully find> an> ammeter which would
> > help
> > > me a lot. Thanks againKaseySent from my> Verizon,> Samsung Galaxy
> > > smartphone> -------- Original message> --------From: J D <
> > > listread at lwca.org> Date:> 11/22/20  2:27 AM> (GMT-05:00) To:
> > > lowfer at mailman.qth.net Subject: Re:> [Lowfer] Lowfer KE> Kasey, it
> would
> > > appear from your schematic that a few> components may be> missing,
> > thereby
> > > preventing your oscillator from being as> stable as it> needs to be.
> This
> > > same situation is found in a commercially> made sorta-kit> rig for 22
> > > meters, and beacons using it there can often be> identified by> their
> > > tendency to wander or even outright jump around in> frequency from> day
> > to
> > > day.A Pierce oscillator needs capacitance from both> legs of the>
> crystal
> > > to ground as part of a phase shift network. There is> stray>
> capacitance
> > > present, of course, without which it would not oscillate> at> all; but
> > that
> > > is neither of sufficient magnitude nor stability to ensure>> reliable
> > > oscillation at the design frequency of the crystal. A good>> starting
> > value
> > > for capacitors for a typical 3 MHz parallel resonant> crystal> would be
> > 27
> > > pF each.In addition, there n>  eeds to be a series> resistor between
> pin
> > 10
> > > and the crystal. It serves> three functions that> each affect frequency
> > > stability to a certain extent:> it isolates the> crystal somewhat from
> > the
> > > complex impedance of the gate> output, it limits> current and thereby
> > power
> > > dissipation in the crystal, and> it is part of> the phase delay
> network.
> > As
> > > a rough first approximation, I'd> suggest 1 K,> maybe as high as 2.2
> > > K.Finally, the shunt resistance across> the crystal> could be a little
> > > higher in value for 3 MHz operation, such as> 3.3 M to> 4.7 M. It's not
> > > terribly critical, but it is preferable to operate> it with> as high a
> > > value as will allow for reliable startup. Lowering the> operating> Q of
> > the
> > > crystal with a low parallel resistance could allow a> crystal to> jump
> > too
> > > easily between primary resonance and any secondary> resonance> modes it
> > may
> > > have.These comments are some basic rule of thumb> guidance.> For more
> > > detailed treatment of Pierce oscillators implemented> with logic>
> gates,
> > I
> > > believe Crystek s>  till offers this article:>>
> > >
> >
> https://www.crystek.com/documents/appnotes/pierce-gateintroduction.pdfJohn
> > >>
> > >
> >
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