BJ,
It is my understanding that the Coax Cable Lead-in-Line
can not be to long. If as you say, you used good
construction techniques and Weather Proofed everything
then it should work OK OutSide.
ROTOR:
The "Rotor" should work OK for 'Peaking' and 'Nulling-Out'
Signal in the AM/MW Broadcast Band and to some degree
in the Shortwave Bands below 5 MHz. IMHO: Above 5 MHz
the Rotor may not do much good.
For 'local' Man-Made-Noise RFI/EMF InDoors or OutSide;
usually once you Null-it-Out you need not move or
position the Loop Antenna Element again.
PRE-AMPLIFER:
I would think that using a Pre-Amplifier in the
Feed-in-Line about 'one diamerter' from the Loop
Antenna Element might make the whole thing work a
lot better.
FWIW: I just tried a RadioShack Catalog # 15-1118B
TV-VCR-FM 10dB Signal Amplifier and it gave a 'boost'
of about S-5 to S-7 in the AM/MW Band and across the
Shortwave Bands.
- Listenable Signals in the S-1 to S-2 range became
S-7 to S-9 and easy to listen to.
- Very 'weak' (faint) Signals in the No S-Meter
reading (S-Zero) became Listenable at S-5 to S-7.
iane ~ RHF
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= = = bpnj*ns*n@y*h**.c*m (bpnjensen) wrote in message
= = = news:<37af7e1c.0410250716.a14918d@...>...
rhf-newsgroups@... (RHF) wrote in message
news:<ff3145e8.0410241212.31281b62@...>...
BRIAN,
I built one of these Coax Cable [Shielded] Loop Antennas for
the 60 Meter Shortwave Band; my intended Lowest Frequency:
- 4.75 MHz to 5.06 MHz with a MidPoint of 4.905 MHz
- Cut to 13.5 Feet [1/10WL] VF=0.66 using RG8 Coax Cable.
- Square shape 3.4 Feet per Side with 4.8 Cross-Arms.
- Round shape 4.3 Diameter Circle.
- Coax Cable Lead-in-Line 5 Feet.
This Coax Cable [Shielded] Loop Antenna is very 'quiet' and
work very well if you are limited to an InDoor Antenna ONLY.
<good stuff snips>
RHF - is there any reason why this antenna could not be adapted for
outdoor use? Good construction, some simple weatherproofing and
mounting on a rotator with plenty of slack coax for turning should
give a unit that could stand up fairly well, right?
Bruce Jensen
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