[Antennas] Balanced line optimum conductor spacing?
Richard Karlquist
[email protected]
Sat, 5 Jan 2002 14:54:18 -0800
I have an 850 ft open wire line made from
#4 aluminum THHN stranded wire on 5 inch
centers (450 ohms). It is very low loss
(.25 dB on 40 meters). This is despite
violating three taboos:
1. Aluminum wire
2. Stranded wire
3. Insulated wire
I also used PVC spacers (another "taboo").
I should mention that it is a "flat" line;
I do not run it at high VSWR.
YMMV.
Rick N6RK
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]]On Behalf Of George, W5YR
> Sent: Saturday, January 05, 2002 1:28 PM
> To: [email protected]
> Subject: Re: [Antennas] Balanced line optimum conductor spacing?
>>>> > Gene Mason wrote:
>> > > The technical data on designing and constructing open
> > > wire feeders, suggests that the wire is not insulated and low loss
> > > spreaders are used. To do otherwise will produce undesireable
> > > results.
>> I question the validity of these statements. Most open-wire feeders that I
> have seen have been constructed from enameled copper wire, hence are
> insulated. What "undesireable results" obtain from the use of insulated
> wire?
>> 72/73, George W5YR - the Yellow Rose of Texas QRP-L 1373
> NETXQRP 6
> Fairview, TX 30 mi NE of Dallas in Collin county EM13qe SOC 262 COG 8
> Amateur Radio W5YR, in the 56th year and it just keeps getting better!
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