[Lowfer] Lowfer Digest, Vol 82, Issue 20

Fri Dec 16 17:38:32 EST 2011

I'm following the new Y antenna entries.
Are the details of the total structure available somewhere?

John KF0HX

On Fri, Dec 16, 2011 at 11:03 AM, <lowfer-request at mailman.qth.net> wrote:

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> Today's Topics:
>
>   1. 501.5 (Bob Raide)
>   2. Re: New vertical Y antenna (Bill Ashlock)
>   3. K1EL Followup (us66soft at aol.com)
>   4. Re: 501.5 (lloyd chastant)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sat, 10 Dec 2011 23:34:28 -0500
> From: "Bob Raide" <rjraide at hotmail.com>
> Subject: [Lowfer] 501.5
> To: <lowfer at mailman.qth.net>
> Message-ID: <BLU162-ds9F0EB7A68DB96AA6E3120ACA30 at phx.gbl>
> Content-Type: text/plain;       charset="utf-8"
>
> will be on with beacon for couple more hours on CW on 501.5 ? reports
> appreciated ?Bob WE2XGR/6 NY
>
> ------------------------------
>
> Message: 2
> Date: Thu, 15 Dec 2011 14:17:07 -0500
> From: Bill Ashlock <ashlockw at hotmail.com>
> Subject: Re: [Lowfer] New vertical Y antenna
> To: <lowfer at mailman.qth.net>
> Message-ID: <SNT116-W56B63EF4B6F549D531ADA7C9A30 at phx.gbl>
> Content-Type: text/plain; charset="iso-8859-1"
>
>
> Hi Rick,
>
> Yah, the progress has been good because the weather has been above normal
> lately... and almost no snow. Today, however, is the exception with
> freezing rain. I'm working inside modifying the one Xmitter I have up here,
> so it will drive a vertical. I'm starting with a 10 to 4 step-down ratio on
> the output transformer. That's figuring approx 10 ohm Rac total for the
> whole antenna (coil + gnd loss). The temporary loading coil I'm using has
> #18ga (equiv) Litz on it but the final, heavier, one has #12ga (equiv) Litz
> and wound interwoven for very low loss.
>
> Looking forward to receiving a return picture of the signal!
>
> Bill
>
> > From: smokinggun at verizon.net
> > To: lowfer at mailman.qth.net
> > Date: Thu, 15 Dec 2011 02:45:34 +0000
> > Subject: Re: [Lowfer] New vertical Y antenna
> >
> > Bill,
> >  Wow you work fast! Thats a lot of wire to put up in that short time. I
> > cant wait to see the results. I think I still have a capture or 2 from
>  last
> > season  and my receive setup hasnt changed.
> >  Of course once you perfect the new antenna , I will bombard you with
> > questions. Not that Im giving up the loop anytime soon.Its working too
> well
> > for me right now.
> > BTW; thanks for the "Y" formula..
> >
> >               Rick
> >
> >
> >
> >
> >
> > ----- Original Message -----
> > From: "Bill Ashlock" <ashlockw at hotmail.com>
> > To: <lowfer at mailman.qth.net>
> > Sent: Wednesday, December 14, 2011 1:36 AM
> > Subject: [Lowfer] New vertical Y antenna
> >
> >
> > >
> > > Rick and others,
> > >
> > > I'm all set to begin on-air testing of this new antenna once I install
> the
> > > loading coil and transmitter at the base and run wires to it. The
> capacity
> > > measurements between upper and lower "Ys" (plus fill-in wires) are
> > > complete and I'm seeing approx 400pf between them. This makes for a low
> > > Rac in the loading coil because of the relatively low inductance of
> 185mh
> > > at 185.3KHz.
> > >
> > > Turned out there was quite a large-sized finge field from the top "Y"
> and
> > > I had to expand the lower "Y" in order to capture a good percentage of
> it.
> > > That rule of thumb saying the radius of the ground radials must be at
> > > least equal to the height of the antenna proved to be true, BUT I think
> > > this applies to a vertical WITHOUT top hat. When a top hat is used it
> > > appears the radius must be equal to the antenna height PLUS the radius
> of
> > > the top hat. At any rate it will be interesting to see how the total
> Rac
> > > for this antenna comes out when I apply power, but I suspect it will be
> > > very low if I have captured as much of the fringe field as capacity
> > > measurements indicate. BTW there's a formula I found for the capacity
> > > between two circular conductive planes separated by a large distance
> (like
> > > 50ft) that seems to work. For Lowfer antennas it comes out approx 3
> times
> > > the capacity derived from the formula that is typically given in text
> > > books for closely spaced planes not accounting for th
> > > e fringe field off to the side. It's a bit lengthy but if anyone is
> > > interested, I'll post it.
> > >
> > > Bill
> > >
> > >
> > >
> > > ______________________________________________________________
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>
> ------------------------------
>
> Message: 3
> Date: Thu, 15 Dec 2011 18:53:33 -0500 (EST)
> From: us66soft at aol.com
> Subject: [Lowfer] K1EL Followup
> To: lowfer at mailman.qth.net
> Message-ID: <8CE899BE33A91C2-16A4-89544 at webmail-m022.sysops.aol.com>
> Content-Type: text/plain; charset="us-ascii"; format=flowed
>
> Last weekend, the K1EL Website listed the K-ID2 chip again, but the
> product page still read that it is not shipping.  As of when I checked
> back today, however, I am please to report that the following message
> is included on their home page:
>
> ''Due to popular demand. KID CW Identifier ICs are back."
>
> Now if I can just find the sheet of paper where i had worked out what
> messages I wanted mine to include...
>
> John
>
>
>
>
> ------------------------------
>
> Message: 4
> Date: Fri, 16 Dec 2011 01:06:13 +0000
> From: lloyd chastant <lloydc6 at gmail.com>
> Subject: Re: [Lowfer] 501.5
> To: "Discussion of the Lowfer (US, European,    & UK) and MedFer bands"
>        <lowfer at mailman.qth.net>
> Message-ID:
>        <CAE89MiQvfntfrnggWMKT=QSKohYSRz8uoV+MzbOmzPOTm8NCTQ at mail.gmail.com
> >
> Content-Type: text/plain; charset="utf-8"
>
> Big Sig hr
> Lloyd W3NF
>
>
> On Sun, Dec 11, 2011 at 4:34 AM, Bob Raide <rjraide at hotmail.com> wrote:
> > will be on with beacon for couple more hours on CW on 501.5 ? reports
> appreciated ?Bob WE2XGR/6 NY
> > ______________________________________________________________
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> End of Lowfer Digest, Vol 82, Issue 20
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>