[SOC] G5RV

Wed, 11 Jun 2003 17:23:32 +0100

Hi Guys,

Well I've done a little research and it seems that most G5RV manufacturers
recommend a choke balun comprising about 10 turns of the co-ax feed close
wound with a diameter of four to six inches fitted, as Chris suggested,
right at the point the phasing line connects to the feed.

One supplier suggested a second, similar balun where the feed enters the
shack.

I concede that for RX only installations there's likely to be little gained
but when transmitting, I gather this helps to keep RF out of the shack.

Also, I've got a 17" monitor about three feet from the K2 and the mess
picked up from that is causing problems. I hope that when the G5RV is
installed (with a 30m run to the base of the antenna) these problems will
diminish. I also get a massive hum from the speakers with key down. I put
that down to the currently unmatched long wire causing massive radiation
from the feeder.

Do these observations make sense?

Paul M3CRQ :-)

----- Original Message -----
From: "Chris Redding" <[email protected]>
To: <[email protected]>
Sent: Tuesday, June 10, 2003 11:42 PM
Subject: Re: [SOC] G5RV

> Agreed...if you live in an electrically 'quiet' location, then just plug
the
> thing in as it comes out of the bag. There is little or no benefit from
> using a balun. Only consider the balun if you've got noise, such as TV
> timebases, low-spec switched-mode PSUs etc around you.
>  73,
> Chris G4PDJ
> ----- Original Message -----
> From: "Hank Kohl K8DD" <[email protected]>
> To: <[email protected]>
> Sent: Tuesday, June 10, 2003 11:06 PM
> Subject: Re: [SOC] G5RV
>
>
> I've made quite a few G5RV's .... 102' for 80 - 6M and 51' for 40 -
> 6M.  Never used
> a balun and they work just fine (with a tuner).
>
> But I have an SOC opinion of baluns on dipoles and other wire antennas!
>
> 73    Hank    K8DD
> soc #69
>
> At 6/10/2003 07:49 PM +0100, Paul Bartlett wrote:
>
> >Hi Gang,
> >
> >I'm in the process of erecting a 102' G5RV. I seem to recall reading
> >somewhere that a choke balun on the 50R feed back to the shack is
> advisable.
> >I gather that half a dozen turns of about 6" diameter on the feed will do
> >the trick.
> >
> >Any comments?
> >
> >Best
> >
> >Paul :-) M3CRQ SOC#529
>
>
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