[1000mp] Audio - FT1OOOmp + rfi

Sat, 24 Aug 2002 10:39:27 -0500

Hi Hans,

A very clear picture of your grounding bulkhead - impressive!

Two questions for you -

Please explain what the term "double pulse" (ground) means.

If the antenna/shack ground system is separated from the houses electrical
ground, won't a lightning hit to your antenna result in a very large voltage
difference between the equipment ground and the AC input?  (start a fire?)
In the U.S., when the antenna and AC grounds are tied together well, the AC
line voltage rises with the ground voltage rise due to the center tap of the
AC transformer being tied to the ground.  This reduces the amount of arcing
that would occur.  Perhaps lightning is not a big problem there as it is
here, sometimes even in the Winter.  (Or maybe I'm am not understanding
something!)

Thanks,

John  W0DC

----- Original Message -----
From: <[email protected]>
To: <[email protected]>
Sent: Friday, August 23, 2002 6:14 AM
Subject: Re: [1000mp] Audio - FT1OOOmp + rfi

> I use ladder line too. In fact two antennas with each their own ladder
line.
> I don't have any RF problems with my rigs (e.g. FT-1000MP Mark V). But I
use
> a good groundsystem for my equipment. My opinion is that a good earth
system
> is very important and may solve a lot of problems, e.g. RFI.
>
> Today I made a photograph of the groundsystem in my shack. I put it on my
> site and will let you know the URL tomorrow.
>
> 73,
> Hans.
>
> Ham Radio:
> PA1HR
>
> Sites:
> www.remeeus.nl
> www.qsl.net/pa1hr
>
> e-mail:
> [email protected]
>
>
> ----- Original Message -----
> From: "Tom Homewood" <[email protected]>
> To: <[email protected]>
> Sent: Friday, August 23, 2002 2:15 PM
> Subject: Re: [1000mp] Audio - FT1OOOmp + rfi
>
>
> > When I had ladder line feeders coming into the shack I had rf problems
on
> 10
> > meters.  The rig would do a master reset and end up on 40 meters.
> >
> > So I think the FT-1000MP is more susceptible than other rigs to rf.
> >
> > The ladder line is out of the shack now and all is well here.
> >
> > 73, Tom, W1TO
> >
> > ----- Original Message -----
> > From: "on4vp" <[email protected]>
> > To: <[email protected]>
> > Sent: Thursday, August 22, 2002 5:42 PM
> > Subject: [1000mp] Audio - FT1OOOmp + rfi
> >
> >
> > > Does other people can confirm the yaesu been sensitive to picking up
RFI
> ?
> > >
> > > 73, Philippe
> > > ON4VP
> > >  .... starting to understand all functionality ...
> > >
> >
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