[Lowfer] Re: LF: Interesting reading

[Dexter McIntyre W4DEX]

J.B.

If the ARRL publication antenna design is similar to the design in the 
patent link,  I first saw it on ON7YD's excellent LF antenna page:

http://www.strobbe.eu/on7yd/136ant/

I used the parallel wire feed design shown in the patent for over a year 
and then changed back to a single wire.  I found I wasn't capable, or 
what I rather believe,  wasn't persistent enough, to make any meaningful 
field strength measurements between the two.  But after many hours of 
transmitting, watching grabbers, and signal reports received I really 
don't think one antenna was better than the other.  I also tried adding 
most of the inductance required for loading the antenna at the top which 
again didn't seem to show any improvement in my signal.  I am now back 
to a single vertical wire with most of the original top hat wires.

My web page still shows the parallel wire system:

http://www.w4dex.com/wd2xko.htm

Dex, W4DEX, WD2XKO, WD2SXH/10


> Hello J B and all ,
> look at :  
> http://patft1.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=/netahtml/PTO/srchnum.htm&r=1&f=G&l=50&s1=3984839.PN.&OS=PN/3984839&RS=PN/3984839 
>
> 73 qro J-P f1afj
>
>
> J. B. Weazle McCreath a écrit :
>> Hello Lowfers & LFers,
>>
>> My good wife gave me Volume 7 of the ARRL Antenna Compendium
>> as one of my Christmas gifts.  On page 3 is an article which describes a
>> very clever way of placing inductive loading at the top of a tower which
>> is part of a top loaded monopole. The author is John Belrose, VE2CV.
>>
>> It's done by placing an insulated conductor inside the upper portion of
>> the tower.  The top of the conductor extends above the tower slightly
>> and has the top loading attached to it.  The lower end of the conductor
>> is connected to the tower to form an air-insulated coaxial line.  Moving
>> the position of this lower connection varies the length of the 
>> coaxial line
>> which in turn varies the inductance.
>>
>> Has anyone here heard of this previously and/or tried it?
>>
>> 73, J.B., VE3EAR - VE3WZL
>> Solar and wind powered
>> Lowfer " EAR"  188.830
>> EN93dr
>>
>> http://www.hurontel.on.ca/~weazle
>>
>>
>>
>>
>>
>>
>>   
>