Junius,

You may wish to read these four Messages about the
LF Engineering H-800 and H-900 Active Antennas.
http://groups.yahoo.com/group/Shortw...a/message/6752

ABOUT - "Omni" {Non} Directional Vertical Active Antennas
http://groups.google.com/group/rec.r...df7f47f701f5f4
http://groups.yahoo.com/group/Shortw...a/message/6549

ABOUT - LF Engineering
- "Omni" {Non} Directional Vertical Active Antennas
http://groups.google.com/group/rec.r...33e014f4850ed8
http://groups.yahoo.com/group/Shortw...a/message/6560

What About
- An LF Engineering Vertical Active Antenna + Plus a Slinky Jr. ?
http://groups.google.com/group/rec.r...bf937573bb4101
http://groups.yahoo.com/group/Shortw...a/message/6563

The Secret to most of these Small Vertical Active Antennas seems
to be Location and Placement of the Active Antenna Element.
http://groups.google.com/group/rec.r...336b89160888d8

http://groups.yahoo.com/group/Shortw...a/message/6561

As Dale Parfitt recommmended a good Ground to the mounting position
of the Active Antenna and connected to the Coax Cable's Outer End
Connector; can help reduce Noise Pick-Up along the Coax Cable .

TIP - Two Snap-On / Clamp-On Ferrite Core Choke one about 4" - 6"
down the Coax Cable from the Active Antenna and another one about
4" - 6" before the Coax Cable enters the House/Building can also help
reduce Noise Pick-Up.


hope this helps - iane ~ RHF
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* * * EXTRACTED from NewsGroups : Rec.Radio.Shortwave
= = = From: "junius" junjun...@...
= = = Date: 27 Nov 2005 16:43:10 -0800
= = = Local: Sun, Nov 27 2005 4:43 pm
= = = Subject: LF Engineering H800 Skymatch

I'm curious, for SW reception, does it work well with a portable
(like, say an SW77 or Satellite 700), as well as with your tabletop
receivers? Size-wise and being optionally battery-powered, it looks
like an attractive option for portable applications (certainly for,
say, a Drake SW8 or something of that calibre), but I'm wondering if
it's just too much an antenna for a portable...


Junius
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= = = Dale Parfitt wrote :

Active whips with good dynamic range are extremely easy to homebrew-
and
excellent article appeared in QST a couple years back using a CATV
transistor- better IP3 than likely any of the consumer antennas
available.
Seem to recall that FAR Circuits has the PC board.
Don't forget a good RF ground at the antenna- without it, the outside
of the
coax shield becomes part of the antenna- transporting house noise out
to the
pick up probe.

Dale W4OP
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Tous Sont Bienvenus ! - - - Groupe par Radio
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Alle Sind Willkommen ! - - - Shortwave Radiozuhörer
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Tutti Sono Benvenuti ! - - - Gruppo Radiofonico
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Ð’Ñ�е Ð*адушны ! - - - Группа оператора
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= = = = = Translation = = = = =
All are Welcome - - - To Join the Shortwave Listeners
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