[600MRG] 600m Antenna

[Alan Cooper]

Hello All,

That was an interesting design! My thought was to lift that drop at the end of his top wire

and layout the 90degree turn out horizontal in some direction if needed. Then add a counterpoise  to follow that top wire somewhere near the ground as much as possible.

That would increase the total capacitive loading of the slinky for 630m. Use the loading

coil and the auto gyro 5gallon bucket setup like we do now and it should tune just fine

on 630m….maybe….  it did cause some creative thought to get going at least if nothing

else.

 

73 Alan w7aln 

 

From: 600mrg-bounces at mailman.qth.net [mailto:600mrg-bounces at mailman.qth.net] On Behalf Of Brian, WA1ZMS
Sent: Saturday, April 28, 2018 5:02 AM
To: Bob and Jane
Cc: /600MRG /600MRG
Subject: Re: [600MRG] 600m Antenna

 

Bob-

 

My 2 cents....

 

Seems like there's a lot going on within that antenna design.  I have not looked at the NEC model but I expect what makes it "work" comes down to the radials he has. A few 1/4-wave radials makes a big difference.

 

The slinky could very well be replaced with just a single loading coil. And the drop wire at the far end of the horizontal wire is likely cancelling some vertical radiation from the slinky. That's counter productive.

 

My feeling is that if you could scale every dimmension he used by 4x, then you'd have the same antenna performance it gives but on 630m.  But for all that effort.....you'd be better off putting up a single vertical wire with lots of capacity hat wire and forget the slinky part.

-Brian, WA1ZMS


On Apr 27, 2018, at 4:03 PM, Bob and Jane <bobjane99 at sbcglobal.net> wrote:

Has anyone looked at the 160m antenna design described in the May issue of QST (page 43)?

Would something like that work on 600m if scaled correctly?

The NEC data is available on the ARRL website, which someone who knew what they were doing (that leaves me out), could play with the parameters to see if a reasonable antenna design could be created.

Bob, WB8ILI

-- 

 <mailto:bobjane99 at sbcglobal.net> bobjane99 at sbcglobal.net

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