[SOC] Strange phenomenon occurring ....

[Joseph L Pontek Sr]

It's funny your bring up John and his helical antennas as I was 
justlooking his book, "Antennas" two days ago.
In the mid 60s, I worked for a company in the DC area and we used his 
helical in a passive radar system.
I think I wore out a pair shoes walking back and forth on the antenna 
range as we made adjustments.
John's book was my bible!  I was going to bring it back from Texas, but 
like other things, I ran out of room.
We wound them on fiberglass tubes and covered them with heat shrink to 
load down the frequency.
Seems like we did make a couple for 70 MHz as well, but are project was 
for K & L bands.


On 5/5/2015 3:52 PM, NG7A wrote:
> Or just build W8JK's Helical antenna (he's the inventor) to really narrow things down.  Normally they re used to produce pencil beams in the microwave regions, but JK actually built one for 10 MHz.  The 15 M version should be twice as easy:)
>
> 73 NG7A

-- 
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