[PVRCNC] OCF dipole as a vertical

[Pete Soper]

A vertical dipole isn't as sensitive to ground quality as a monopole.  
It's got the other quarter wavelength to work against. :-)

I put up a weird 1/2wl vertical for 15m during the ARRL contest. I say 
"weird" because I fed it at the center, with the feedline coming 
straight out 12 feet and then down at an angle to keep the omni pattern 
intact and to avoid the contortions of end feeding. I used a common 
choke balun with a bunch of mix 73 around RG316. But the feedline 
impedance was closer to 75 ohms than 50. It worked well for receiving. I 
didn't expect to use it for transmit but couldn't resist on Sunday and 
worked all but a 3-4 stations I could hear using 100 watts.

-Pete AD4L

On 3/31/20 7:38 AM, Marty Young via PVRCNC wrote:
> Hi Will,
>   
> Our beach antenna for 40 during our July yearly IOTA expedition to Harkers Isl. (NA-067) is a half wave end fed up vertically on an MFJ 70' collapsible fiberglass pole.  Its fed/matched at the bottom and is straight up in the air like a vertical. It has always performed superbly for us.
>   
> We don't put out any ground radials, that I remember, but Paul, AA4XX, has always been in charge of deploying this antenna, so you may want to get up with him as to the details if you are interested.
>   
>   
> Stay well,
>   
> 73  Marty W4MY
>   
>   
> -----Original Message-----
> From: "Will via PVRCNC" <pvrcnc at mailman.qth.net>
> Sent: Monday, March 30, 2020 7:46pm
> To: pvrcnc at mailman.qth.net
> Subject: [PVRCNC] OCF dipole as a vertical
>
>
>
> I'm planning on using some "quarantine" time to do some antenna experimentation. At Surf City, I have been using an 80m OCF dipole as an inverted vee with apex at 65-70'. So far, I have been underwhelmed by its  performance all around. I expect if I could mount it as a flat top, it would probably work well, but I only have the single support and only smaller trees in the neighboring vacant lot.
> What I am thinking of doing is mounting a 40 meter OCF as a slanted wire vertical. As my shack is on the 4th floor, the feed point being raised is no problem. In fact, it shortens the coax run needed. Does anyone have any experience with vertical dipoles?
> Y'all stay safe in this madness!
> Hope to see you for the virtual meeting on Thursday. We wouldn't have to do it on the internet if we all had access to some HF radios...hmmm...anybody got one? :>)
> 73,
> Will
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