LF Engineering H800 and H900
gi...@yahoo.com
Im in a situation where the best I can do is about 50 feet of wire to a
tree and was wondering if one of these active antennas would be an
upgrade or a downgrade from my 50 footer endfed?
Thanks...Gil
RHF
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The LF Engineering H800 Skymatch Active Antenna
-= Verses =- The Low Noise Inverted "L" Antenna
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/2217
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ABOUT - The LF Engineering H800 Skymatch Active Antenna
http://www.lfengineering.com/pdf/H800inst.pdf
http://www.grove-ent.com/ANT15.html
http://www.lfengineering.com/com_products.htm
<Review-at-the-Bottom> http://entropy.brneurosci.org/radio.html
NOTE - The LF Engineering H-800 Active Antenna covers
the full LF/HF/VHF spectrum from 10kHz through 50 MHz.
* Antenna Probe Size: 26" Length, 1" Diameter
* 50 Feet of RG174U Coax Cable Feed-in-Line
* Power Gain 30dB (1MHz)
* DC Power: 12-18 Volt, 10 ma
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GIL - Since you can have an External Shortwave Antenna
to use with your Radio(s). I would recommend a Low Noise
Inverted "L" Antenna over the LF Engineering H800 Skymatch
Active Antenna.
.
ABOUT - The Low Noise Inverted "L" Antenna
http://tinyurl.com/4ejjl
http://tinyurl.com/43lhx
http://tinyurl.com/4phm9
http://tinyurl.com/68phl
http://tinyurl.com/4nngb
http://tinyurl.com/559us
.
For the casual Shortwave Radio Listener; the Inverted "L"
Antenna is easy to visualize and conceive of building as
a Do-It-Yourself Project.
.
READ - The 'simple' Answer (in most cases) is the Low Noise
Inverted "L" Antenna
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/1785
.
When properly laid-out, arranged and constructed;
the Inverted "L" Antenna provides a relatively 'low noise'
"Omni-Directional" Shortwave Listener's (SWL) Antenna.
.
READ - The Inverted "L" Antenna - It's 'basic' Lay-Out
and Structure {Why It Works}
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/1969
.
For the 'non-technical' Shortwave Listener the Inverted
"L" Antenna meets the "KISAP" Test and that is good.
KISAP = Keep-It-Simple And Practical [.]
.
TIP - For those who do not wish to go through the process
of building their own Inverted "L" Antenna; they can buy
a pre-build Random {LongWire} Wire Antenna and configure
it as an Inverted "L" Antenna - Two come to mind:
.
First - If You Want A "Ready-Made" Low Noise Antenna that
lends itself to be installed as an Inverted "L" Antenna
then simply Buy a PAR End Fed Shortwave Listener (EF-SWL)
Antenna and 'configuring' the Antenna in the [Shape] of an
Inverted "L" Antenna.
* PAR Electronics "End Fed Shortwave Listener" (EF-SWL) Antenna
POPCOM=> http://www.popular-communications.com/23HomelandOct04.html
MT=> http://www.monitoringtimes.com/html/mt2003reviews.html
eHAM=> http://www.eham.net/reviews/detail/3707
PAR=> http://www.parelectronics.com/swl_end.htm
UR=> http://www.universal-radio.com/catalog/sw_ant/2205.html
GE=> http://www.grove-ent.com/ANT8.html
.
READ - Par EF-SWL End-Fed Shortwave Antenna configured as
an Inverted "L" Antenna
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/1562
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/1711
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/1717
.
Another Ready-Made Option is the High-Z Shortwave Longwire
Antenna with Matching Transformer (MLB) and SO-239 Connector
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/1659
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/1709
.
READ - Inverted "L' Antenna Reading List
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/374
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A NOTE ABOUT THE "LOW NOISE" ANTENNA 'DESIGN CONCEPTS':
A Random Wire Antenna Element coupled via a 9:1 Matching
Transformer at the Near-End of the Antenna with a Ground
Rod and Coax Cable Feed-in-Line to the Receiver. This is
the basic SWL Antenna that uses the "Low Noise Antenna"
'design concepts' that were {popularized} by John Doty.
http://www.anarc.org/naswa/badx/antennas/low-noise_antenna.html
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/2
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/374
READ - Three "Must" Links to Read -wrt- Low Noise SWL Antenna
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/949
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When All Is Said and Done {Written} . . . What Works - WORKS !
.
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iane ~ RHF
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All are WELCOME and "Invited to Join" the
Shortwave Listener (SWL) Antenna eGroup on YAHOO !
<http://groups.yahoo.com/group/Shortwave-SWL-Antenna/>
.
Some Say: On A Clear Day You Can See Forever.
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/502
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I BELIEVE: On A Clear Night . . .
You Can Hear Forever and Beyond, The BEYOND !
With a Shortwave Listener SWL Antenna of your own making.
"If You Build It {SWL Antenna} You Will Hear Them !"
.
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Mark S. Holden
I have an H800 that I picked up for camping and vacations.
I can't predict how it'll perform compared to your present antenna, but
considering how small it is, it performs quite well. Given the entire
antenna would be farther from the house, I'd expect it to pick up less
RFI.
My pet peeve is the normal ones like Grove has come with the coax
"permanently" attached. If you order direct from LF engineering, you
can get one with a connector so you can easily replace the coax. It
adds little to the cost.
Mine still works, but I've stopped using it because the coax is showing
wear at the antenna end.
But personally, if I was in the market for an active antenna for
permanent use in one location, I'd go with the Wellbrook.
RHF
SWL => http://groups.yahoo.com/group/Shortwave-SWL-Antenna/
= = = From: "Dwight Weidman" <dmw**dm*n@*nn*rn*t.n*t>
= = = Date: Fri Feb 11, 2005 5:31 am
= = = Subject: Re: [Shortwave-SWL-Antenna] LF Engineering H800
= = = Skymatch Active Antenna -=V=- Low Noise Inverted "L" Antenna
.
I had no success at all with the LF Engineering H800 Skymatch antenna.
The biggest problem was severe overloading of my R75.
.
I also tried the LF Engineering LF/VLF models in the past,
and they had the same problem.
.
Dwight K3WVU
.
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sdan...@nyc.rr.com
I used an H800 for a while. I thought it was a good
antenna...surprisingly good. It's small size is the key to its success.
If you find a nice, quiet spot for it, you'll pick up very little noise
and hear lots and lots of signals. It's especially good below 5 mhz, in
my experience.
I know they're a lot more expensive, but have you considered one of the
Wellbrook loops? They're made for people with space limitations and I
suspect that they would outperform your wire by a considerable margin.
Steve