On Tue, 04 Nov 1997 09:23:35 +0100 Ryszard Tymkiewicz <rtym@ippt.gov.pl>
writes:
>At 10:05 AM 11/3/97 EST, you wrote:
>
>>I tried one almost identical to yours many years ago. It worked the
>same
>>as you described and was also the only thing that I had to listen
>South.
>>All my Beverages were W , NW or NE due to property lines.
>>It was then that I tried the Slinky Beverage which did show
>directivity
>>and had better SNR than the low loop. At that QTH I used 5 Slinky's
>>stretched over about 150'.
>>
>>73 Carl KM1H
>>>--
>
>Hello Carl,
>I have a request to you.Could you send me /when you have some time/
>some
>descriptions of "Slinky"?
>I'v never found any informations in any books I have been reading
>/ON4UN etc/.
>I have 18m tower with TH6DXX and Half Sloper from the top.This is my
>main
>receiving antenna,only during winter time I'm using 2X200m Beverages
>switched S-N.
>Last time I have more noise /probably from power lines/ and I will try
>to
>make shielded loop thhis afternoon but I'm very interested in Slinky
>too.
>The problem is my garden is only 1000 sq m /32mx32m/ but my neighbours
>are
>my friends,so I could use some of their area too.
>I have now 235 countries and you know very well how difficult is find
>/especially to hear/ something new HI.
>
>
> 73 Rys SP5EWY
Hello Rys,
The Slinky is a childs toy that has been popular in the USA for over 50
years. It is made of 80 + turns of cadmium plated spring steel and is
approximately 3 inches in diameter. When you solder 5 of them together
and stretch out over 150-200' you wind up with a fairly effective and
directional antenna. For simplicity it may be terminated and fed as a
regular wire Beverage.
W8JI and others who ran tests report the terminating impedence is in the
1000-1500 Ohm range. For best performance that would require a bit of
experimenting and a two step matching transformer.
I have been using the Slinky Beverage here for about 12 years and at this
QTH it often outperforms in SNR, compared to 580 to 750' wire Beverages.
73 Carl KM1H
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