Today's Message Index:
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1. 05:30 AM - Hand-made Glide Slope Antenna (Sam)
2. 06:20 AM - Re: Hand-made Glide Slope Antenna (Robert L. Nuckolls, III)
3. 11:05 PM - Re: Hand-made Glide Slope Antenna (Henry Hallam)
Message 1
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| Subject: | Hand-made Glide Slope Antenna |
Bob -
I am considering using/making a hand-made glideslope antenna like
the one you show in chapter 13, figure 13-13 (it's a good thing I'm not
superstitious!). My only issue is the ferrite beads. They are available
in a bewildering variety. What should I use for a dedicated GS antenna?
Sam Staton
Jackonsville, FL
Message 2
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| Subject: | Re: Hand-made Glide Slope Antenna |
At 07:28 2015-03-07, you wrote:
>
>Bob -
> I am considering using/making a hand-made glideslope antenna
> like the one you show in chapter 13, figure 13-13 (it's a good
> thing I'm not superstitious!). My only issue is the ferrite beads.
> They are available in a bewildering variety. What should I use for
> a dedicated GS antenna?
Leave them off. Those are coming out in the
next revision to the 'Connection. Cessna
built thousands of similar antennas in the '60s
with no beads. Laboratory tests have show them
to offer no observable or even measurable
benefit.
Bob . . .
Message 3
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| Subject: | Re: Hand-made Glide Slope Antenna |
Bob,
Are you still a believer in ferrite beads for transmit antennas, if
not for receivers? I was under the impression they helped form a sort
of crude balun, preventing RF current from flowing back through the
coax sleeve rather than into the arm of the dipole.
Cheers, Henry
On Sat, Mar 7, 2015 at 6:18 AM, Robert L. Nuckolls, III
<nuckolls.bob@aeroelectric.com> wrote:
> <nuckolls.bob@aeroelectric.com>
>
> At 07:28 2015-03-07, you wrote:
>>
>>
>> Bob -
>> I am considering using/making a hand-made glideslope antenna like the
>> one you show in chapter 13, figure 13-13 (it's a good thing I'm not
>> superstitious!). My only issue is the ferrite beads. They are available in a
>> bewildering variety. What should I use for a dedicated GS antenna?
>
>
> Leave them off. Those are coming out in the
> next revision to the 'Connection. Cessna
> built thousands of similar antennas in the '60s
> with no beads. Laboratory tests have show them
> to offer no observable or even measurable
> benefit.
>
>
> Bob . . .
>
>
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